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Difficulty: 4 of 5Under LOP (in Geometry)
Posted on 2017-12-13 (3 Comments)
re(2): GSP exploration by Charlie (2017-12-13 15:24:45)
re: GSP exploration by Charlie (2017-12-13 15:02:18)
Some Thoughts GSP exploration by Charlie (2017-12-13 12:12:07)
Difficulty: 3 of 5Under Perform and explain (in Tricks)
Posted on 2017-12-12 (11 Comments)
re(2): Computer results--but but but... by Charlie (2017-12-13 07:48:50)
re: Answer by Charlie (2017-12-12 11:30:34)
re: Computer results -- proof of sorts by Charlie (2017-12-12 11:27:25)
Solution Computer results by Charlie (2017-12-12 11:01:33)
Difficulty: 2 of 5Under Enigma (in Logic)
Posted on 2017-12-11 (2 Comments)
re: Just kidding (spoiler) by Charlie (2017-12-11 11:06:33)
Difficulty: 4 of 5Under Verify and prove (in Sequences)
Posted on 2017-12-10 (5 Comments)
Solution re: computer verification no proof ... or, come to think about it ... by Charlie (2017-12-10 10:32:30)
Some Thoughts computer verification no proof by Charlie (2017-12-10 10:26:50)
Difficulty: 4 of 5Under All, except two (in Sequences)
Posted on 2017-12-09 (4 Comments)
re: ERRATIC SOLUTION (spoiler) by Charlie (2017-12-09 17:43:57)
Difficulty: 3 of 5Under Spelling bee results (in Just Math)
Posted on 2017-12-08 (1 Comments)
Solution computer solution with most of the bonuses by Charlie (2017-12-08 15:24:50)
Difficulty: 3 of 5Under Three fours (in Numbers)
Posted on 2017-12-06 (3 Comments)
re(2): computer solutions (spoilers) by Charlie (2017-12-07 09:05:40)
Solution computer solutions (spoilers) by Charlie (2017-12-06 19:34:47)
Difficulty: 3 of 5Under Just name the date (in General)
Posted on 2017-12-05 (2 Comments)
Solution solution by Charlie (2017-12-05 10:03:01)
Difficulty: 3 of 5Under Just 4 different digits (in Numbers)
Posted on 2017-12-03 (10 Comments)
re: @ Charlie: Answers for the revised puzzle: by Charlie (2017-12-03 19:29:13)
just 3 different digits by Charlie (2017-12-03 12:03:10)
Solution re(2): Too many - here's some by Charlie (2017-12-03 11:45:15)
re: computer solution to the puzzle as is continued by Charlie (2017-12-03 11:31:35)
Solution computer solution to the puzzle as is by Charlie (2017-12-03 11:30:08)
Difficulty: 4 of 5Under One ninth of a pandigital (in Numbers)
Posted on 2017-12-02 (1 Comments)
Solution computer solution by Charlie (2017-12-02 14:44:27)
Difficulty: 3 of 5Under A square pairing (in Numbers)
Posted on 2017-11-29 (1 Comments)
Solution computer solution by Charlie (2017-11-29 13:31:55)
Difficulty: 3 of 5Under Dice stacking (in Games)
Posted on 2017-11-28 (4 Comments)
re(3): solution (spoiler) by Charlie (2017-11-28 13:31:14)
re: solution (spoiler) by Charlie (2017-11-28 10:00:11)
Solution solution (spoiler) by Charlie (2017-11-28 09:53:21)
Difficulty: 1 of 5Under Quickie XI (in Numbers)
Posted on 2017-11-27 (2 Comments)
Solution solution by Charlie (2017-11-27 13:06:02)
Difficulty: 3 of 5Under A special pandigital (in Numbers)
Posted on 2017-11-26 (1 Comments)
Solution computer solution by Charlie (2017-11-26 16:30:12)
Difficulty: 4 of 5Under Unique decimal primes (in Algorithms)
Posted on 2017-11-24 (1 Comments)
Some Thoughts computer exploration by Charlie (2017-11-24 14:22:49)
Difficulty: 3 of 5Under A pandigital sum (in Numbers)
Posted on 2017-11-21 (1 Comments)
Solution computer solution (spoiler) by Charlie (2017-11-21 10:32:45)
Difficulty: 3 of 5Under What is .... ...... (in Numbers)
Posted on 2017-11-19 (1 Comments)
Solution computer solution by Charlie (2017-12-02 14:55:23)
Difficulty: 3 of 5Under Ulam numbers II (in Numbers)
Posted on 2017-11-18 (1 Comments)
Solution computer "solution" by Charlie (2017-11-18 16:10:30)
Difficulty: 3 of 5Under Pythagorean areas (in Numbers)
Posted on 2017-11-17 (7 Comments)
re: computer solution after fixing bug by Charlie (2017-11-19 09:48:06)
Solution computer solution after fixing bug by Charlie (2017-11-19 08:44:36)
Some Thoughts Either .... by Charlie (2017-11-17 14:26:43)
Difficulty: 3 of 5Under Where Did You Start? (in Just Math)
Posted on 2017-11-16 (3 Comments)
Solution tried analytic but had to resort to program (spoiler) by Charlie (2017-11-16 15:19:18)
Difficulty: 3 of 5Under Your creativity challenged (in Riddles)
Posted on 2017-11-15 (5 Comments)
I'm not sure why that posted twice by Charlie (2017-11-15 10:15:28)
Some Thoughts two ideas by Charlie (2017-11-15 10:13:32)
Some Thoughts two ideas by Charlie (2017-11-15 10:13:32)
Difficulty: 3 of 5Under Fun primes (in Numbers)
Posted on 2017-11-14 (2 Comments)
Solution computer solution by Charlie (2017-11-14 14:08:09)
Difficulty: 3 of 5Under Making a 10 (in Numbers)
Posted on 2017-11-13 (4 Comments)
re: 02 01 2387 (Spoiler) by Charlie (2017-11-13 14:46:41)
Difficulty: 3 of 5Under Beast number as a substring (in Numbers)
Posted on 2017-11-11 (2 Comments)
Solution computer investigation including a solution by Charlie (2017-11-11 12:02:15)
Difficulty: 3 of 5Under Talking BIG (in Numbers)
Posted on 2017-11-10 (3 Comments)
Solution solution by Charlie (2017-11-10 11:02:25)
Difficulty: 3 of 5Under Reverse Engineering I (in Cryptography)
Posted on 2017-11-09 (2 Comments)
Solution answer by Charlie (2017-11-09 13:25:23)
Difficulty: 2 of 5Under One digit answer (in Numbers)
Posted on 2017-11-08 (3 Comments)
re: Solution by Charlie (2017-11-08 15:49:59)
Difficulty: 2 of 5Under Attributed to Lewis Carroll (in Probability)
Posted on 2017-11-07 (4 Comments)
Solution 2 scenarios: with and without replacement by Charlie (2017-11-07 14:19:37)
Difficulty: 2 of 5Under Rectangle in a circle (in Just Math)
Posted on 2017-11-07 (3 Comments)
Solution GSP and calculus solution by Charlie (2017-11-07 10:07:58)
Difficulty: 3 of 5Under No big digits involved (in Numbers)
Posted on 2017-11-06 (2 Comments)
Solution solution by Charlie (2017-11-06 18:04:58)
Difficulty: 2 of 5Under Searching for the minimal repunit (in Numbers)
Posted on 2017-11-06 (1 Comments)
Solution computer solution by Charlie (2017-11-06 12:38:05)
Difficulty: 3 of 5Under Square triplets (in Just Math)
Posted on 2017-11-05 (2 Comments)
Solution computer solution by Charlie (2017-11-05 14:14:00)
Difficulty: 4 of 5Under Truth or consequences (in Just Math)
Posted on 2017-11-02 (2 Comments)
Solution solution by Charlie (2017-11-02 17:51:44)
Difficulty: 3 of 5Under Counting appearances (in Numbers)
Posted on 2017-11-01 (1 Comments)
Solution solution by Charlie (2017-11-01 16:09:16)
Difficulty: 2 of 5Under Mutual dependence (in Numbers)
Posted on 2017-11-01 (3 Comments)
Solution answer by Charlie (2017-11-01 10:55:23)
Difficulty: 2 of 5Under 2 ways to prove it (in Just Math)
Posted on 2017-10-31 (2 Comments)
Solution my offered proofs... are they really the same by Charlie (2017-10-31 13:58:26)
Difficulty: 2 of 5Under Create 2 congruent triangles (in Geometry)
Posted on 2017-10-31 (4 Comments)
re: Solution (spoiler) by Charlie (2017-10-31 10:30:21)
Solution solution by Charlie (2017-10-31 10:23:52)
Difficulty: 2 of 5Under Letters in a Box (in Logic)
Posted on 2017-10-30 (2 Comments)
My apologies re: official solution by Charlie (2017-11-16 18:47:36)
Difficulty: 4 of 5Under A common feature (in Numbers)
Posted on 2017-10-29 (1 Comments)
Solution researched solution by Charlie (2017-10-29 11:35:41)
Difficulty: 3 of 5Under Two SPECIAL PARTITIONS (in Numbers)
Posted on 2017-10-28 (4 Comments)
oh, and the program... by Charlie (2017-10-28 11:22:23)
re: computer solution by Charlie (2017-10-28 11:20:37)
Solution computer solution by Charlie (2017-10-28 11:17:31)
Difficulty: 2 of 5Under Leaving the least (the most) (in Numbers)
Posted on 2017-10-27 (2 Comments)
Solution computer solutions by Charlie (2017-10-27 10:40:23)
Difficulty: 2 of 5Under It is not SIX (in Numbers)
Posted on 2017-10-26 (4 Comments)
Solution computer solution (spoiler) by Charlie (2017-10-26 10:42:39)
Difficulty: 3 of 5Under Obtuse angle? (in Probability)
Posted on 2017-10-25 (2 Comments)
Solution solutions by Charlie (2017-10-25 15:02:17)
Difficulty: 3 of 5Under One word - created by two others (in Word Problems)
Posted on 2017-10-25 (3 Comments)
re: No Subject by Charlie (2017-10-25 10:41:00)
Difficulty: 2 of 5Under 3 multiples of cubes (in Numbers)
Posted on 2017-10-24 (1 Comments)
Solution computer solution by Charlie (2017-10-24 11:06:36)
Difficulty: 3 of 5Under Urban architecture (in Word Problems)
Posted on 2017-10-23 (1 Comments)
Some Thoughts computer findings by Charlie (2017-10-23 15:52:28)
Difficulty: 4 of 5Under 31 or more (in Games)
Posted on 2017-10-21 (4 Comments)
re: computer aided solution by Charlie (2017-10-21 17:16:49)
Solution computer aided solution by Charlie (2017-10-21 16:59:55)
Difficulty: 4 of 5Under 3 lowest score words (in Word Problems)
Posted on 2017-10-20 (3 Comments)
Solution computer solution by Charlie (2017-10-20 16:14:49)
Difficulty: 3 of 5Under Does it continue? An original. (in Numbers)
Posted on 2017-10-20 (7 Comments)
re(2): computer solution by Charlie (2017-10-20 14:21:05)
Solution computer solution by Charlie (2017-10-20 11:04:42)
Difficulty: 3 of 5Under The Odds Must Be Crazy (in Probability)
Posted on 2017-10-19 (4 Comments)
re(2): My take on it by Charlie (2017-10-19 22:37:36)
Some Thoughts My take on it by Charlie (2017-10-19 13:43:53)
Difficulty: 4 of 5Under √22 (in Numbers)
Posted on 2017-10-18 (3 Comments)
Solution short general proof by Charlie (2017-10-18 15:28:53)
Difficulty: 3 of 5Under SUM = PR0DUCT (in Numbers)
Posted on 2017-10-18 (3 Comments)
Solution computer solution by Charlie (2017-10-18 10:52:00)
Difficulty: 4 of 5Under Alfey revava ... (in General)
Posted on 2017-10-17 (3 Comments)
re: computer solution by Charlie (2017-10-17 16:25:34)
Solution computer solution by Charlie (2017-10-17 16:16:32)
Difficulty: 3 of 5Under 9 cubes (in Numbers)
Posted on 2017-10-17 (1 Comments)
Solution computer solution by Charlie (2017-10-17 12:51:10)
Difficulty: 3 of 5Under He, me, and you (in Word Problems)
Posted on 2017-10-16 (2 Comments)
computer aided part 1 by Charlie (2017-10-16 18:32:37)
Difficulty: 3 of 5Under Two-three integers (in Numbers)
Posted on 2017-10-15 (6 Comments)
re: Analytic Solution by Charlie (2017-10-15 21:16:32)
re(2): computer-aided solution -- another number continued by Charlie (2017-10-15 17:01:30)
re: computer-aided solution -- another number by Charlie (2017-10-15 16:57:59)
Solution computer-aided solution by Charlie (2017-10-15 16:54:45)
Difficulty: 4 of 5Under What's out? (in Word Problems)
Posted on 2017-10-13 (3 Comments)
re: anagrammatic spoilers by Charlie (2017-10-13 10:27:05)
Difficulty: 3 of 5Under Equal Power Sum Sets (in Numbers)
Posted on 2017-10-11 (1 Comments)
Solution computer solution by Charlie (2017-10-11 15:13:30)
Difficulty: 3 of 5Under Somewhere in the USA (in Word Problems)
Posted on 2017-10-10 (6 Comments)
Solution Computer search finds other geographic entities by Charlie (2017-10-10 13:35:40)
Difficulty: 3 of 5Under Does it continue? 10: Alternate differences (in Numbers)
Posted on 2017-10-07 (2 Comments)
Some Thoughts computer exploration by Charlie (2017-10-07 22:22:53)
Difficulty: 4 of 5Under Squeeze in (in Word Problems)
Posted on 2017-10-05 (4 Comments)
Solution computer aided solution by Charlie (2017-10-05 14:43:54)
Difficulty: 3 of 5Under In Europe (in General)
Posted on 2017-10-04 (6 Comments)
re(2): the equation part by Charlie (2017-10-04 13:35:08)
Some Thoughts the equation part by Charlie (2017-10-04 10:26:43)
Difficulty: 3 of 5Under A set of ages (in Just Math)
Posted on 2017-10-02 (1 Comments)
Solution computer aided solution by Charlie (2017-10-02 11:07:08)
Difficulty: 3 of 5Under Oddly even numbers (in Numbers)
Posted on 2017-10-01 (1 Comments)
Solution computer solution by Charlie (2017-10-01 15:48:18)
Difficulty: 3 of 5Under Does it continue? 8: Prime together (in Numbers)
Posted on 2017-09-30 (1 Comments)
Solution computer solution by Charlie (2017-09-30 15:52:22)
Difficulty: 4 of 5Under A scrambled BEDLAM (in Just Math)
Posted on 2017-09-29 (2 Comments)
Solution with computer assistance by Charlie (2017-09-29 10:42:53)
Difficulty: 3 of 5Under Does it continue? 7: Partial sums again (in Numbers)
Posted on 2017-09-28 (1 Comments)
Some Thoughts computer exploration by Charlie (2017-09-28 15:15:27)
Difficulty: 3 of 5Under Toasting the eternal (in Just Math)
Posted on 2017-09-27 (1 Comments)
Solution computer solution (spoilers) by Charlie (2017-09-27 11:49:50)
Difficulty: 3 of 5Under Does it continue? 6: Partial sums (in Numbers)
Posted on 2017-09-25 (7 Comments)
Some Thoughts answers by Charlie (2017-09-25 12:32:44)
Difficulty: 3 of 5Under Does it continue? 5: powers of 2 (in Numbers)
Posted on 2017-09-24 (6 Comments)
Some Thoughts computer findings by Charlie (2017-09-24 16:53:43)
Difficulty: 4 of 5Under 3 by 3 by 5 (in Word Problems)
Posted on 2017-09-22 (6 Comments)
Some Thoughts computer finds few words, apparently not all compatible by Charlie (2017-09-22 12:17:16)
Some Thoughts only two words found -- no computer program used by Charlie (2017-09-22 10:38:15)
Difficulty: 3 of 5Under Does it continue? 4: Euclid's next prime (in Numbers)
Posted on 2017-09-21 (3 Comments)
Some Thoughts Initial thought and computer exploration by Charlie (2017-09-21 13:05:22)
Difficulty: 3 of 5Under Does it continue? 3: Growing table of primes (in Numbers)
Posted on 2017-09-19 (3 Comments)
Solution first thought and computer vindication by Charlie (2017-09-19 10:54:29)
Difficulty: 4 of 5Under Reverse Engineering (in General)
Posted on 2017-09-15 (3 Comments)
Solution researched answer by Charlie (2017-09-15 10:45:16)
Difficulty: 2 of 5Under Does it continue? 1: Chord regions (in Sequences)
Posted on 2017-09-13 (9 Comments)
re(2): Huh?......ehe by Charlie (2017-09-13 10:44:18)
Difficulty: 2 of 5Under MMMMMM Donut (in Just Math)
Posted on 2017-09-11 (4 Comments)
Solution solution by Charlie (2017-09-11 12:16:35)
Difficulty: 4 of 5Under Product of 100 factorials (in Just Math)
Posted on 2017-09-07 (8 Comments)
bringing my original table up to n=100 by Charlie (2017-09-08 11:05:02)
miscellany by Charlie (2017-09-08 08:51:28)
Some Thoughts when it works -- computer exploration by Charlie (2017-09-07 10:53:24)
Difficulty: 3 of 5Under Who began with 50 cents? (in Just Math)
Posted on 2017-09-06 (3 Comments)
Solution solution by Charlie (2017-09-06 13:13:58)
Difficulty: 3 of 5Under Getting closer to your pie (in Numbers)
Posted on 2017-09-04 (10 Comments)
re(2): A little less obvious, for part c by Charlie (2017-09-05 07:40:34)
Some Thoughts A little less obvious, for part c by Charlie (2017-09-04 10:36:41)
Difficulty: 2 of 5Under Two sums of digits (in Just Math)
Posted on 2017-09-02 (5 Comments)
Solution computer solution (spoilers) by Charlie (2017-09-02 12:54:29)
Difficulty: 3 of 5Under Tea-time cakes (in Just Math)
Posted on 2017-09-01 (2 Comments)
Solution of course there's the computer way by Charlie (2017-09-01 13:53:37)
Difficulty: 3 of 5Under Are we there yet? (in Probability)
Posted on 2017-08-30 (5 Comments)
re: Part 3 by Charlie (2017-08-31 15:40:15)
Some Thoughts parts 1 & 2 only; outline of 3 by Charlie (2017-08-30 12:28:14)
Difficulty: 1 of 5Under Triangle in a triangle (in Shapes)
Posted on 2017-08-28 (4 Comments)
Solution answer by Charlie (2017-08-28 12:17:22)
Difficulty: 3 of 5Under Strobogrammatic to pandigital (in Numbers)
Posted on 2017-08-26 (4 Comments)
Solution computer solution by Charlie (2017-08-26 16:31:15)
Difficulty: 3 of 5Under Leaving a maximal result (in Algorithms)
Posted on 2017-08-25 (1 Comments)
Solution algorithm by Charlie (2017-08-25 10:47:40)
Difficulty: 3 of 5Under Next Numbers Please #9 (in Numbers)
Posted on 2017-08-23 (9 Comments)
re(5): When 12 appears by Charlie (2017-08-29 09:54:43)
re(4): When 12 appears by Charlie (2017-08-29 09:47:19)
Difficulty: 3 of 5Under The trio (in Liars and Knights)
Posted on 2017-08-21 (1 Comments)
Solution solution by Charlie (2017-08-21 12:23:07)
Difficulty: 3 of 5Under A repunit product (in Word Problems)
Posted on 2017-08-19 (4 Comments)
Solution solution by Charlie (2017-08-19 22:04:28)
Difficulty: 4 of 5Under Marbles in boxes (in Algorithms)
Posted on 2017-08-16 (5 Comments)
Solution solution by Charlie (2017-08-16 11:41:37)
Difficulty: 3 of 5Under Divisibility in a sequence (in Numbers)
Posted on 2017-08-12 (2 Comments)
Existence proof (lowest pair requiring 79) by Charlie (2017-08-12 12:36:27)
Solution proof (but not a proof that this is the lowest achievable) by Charlie (2017-08-12 11:42:49)
Difficulty: 3 of 5Under Bob and Alice make a poor choice (in Numbers)
Posted on 2017-08-11 (7 Comments)
Solution re(2): solution (spoiler) - precision check by Charlie (2017-08-11 14:29:42)
Solution solution (spoiler) by Charlie (2017-08-11 12:33:55)
Difficulty: 3 of 5Under Straight or rotated (in Numbers)
Posted on 2017-08-10 (3 Comments)
Solution program and solution (spoilers) by Charlie (2017-08-10 11:16:22)
Difficulty: 3 of 5Under Even (related) chances (in Probability)
Posted on 2017-08-09 (4 Comments)
Solution solution (spoiler) by Charlie (2017-08-09 11:34:37)
Difficulty: 3 of 5Under Palindromic sum (in Just Math)
Posted on 2017-08-08 (3 Comments)
Solution The "grunt work" left to the computer (spoiler) by Charlie (2017-08-08 10:13:42)
Difficulty: 3 of 5Under A text sans (in Word Problems)
Posted on 2017-08-07 (1 Comments)
Solution He who hesitates is lost by Charlie (2017-08-07 12:33:13)
Difficulty: 4 of 5Under A unique Heronian triangle (in Geometry)
Posted on 2017-08-05 (6 Comments)
re(4): easy - spoiler by Charlie (2017-08-06 07:58:16)
Difficulty: 4 of 5Under Published in the thirties (in Famous Riddles)
Posted on 2017-08-03 (3 Comments)
Solution An Isle of Joy (this is not Kansas any more) (spoiler) by Charlie (2017-08-04 10:18:07)
Difficulty: 4 of 5Under Think big (in Numbers)
Posted on 2017-08-03 (2 Comments)
Solution Actually it could be done with VB by Charlie (2017-08-03 11:08:15)
Solution Think Big ... Think UBASIC (spoilers) by Charlie (2017-08-03 10:31:36)
Difficulty: 3 of 5Under Dec = xeh (in Numbers)
Posted on 2017-08-02 (5 Comments)
Solution computer solutions. Don't know the commonality. by Charlie (2017-08-02 14:16:35)
Difficulty: 2 of 5Under Two parallelograms (in Geometry)
Posted on 2017-08-01 (3 Comments)
Solution GSP by Charlie (2017-08-01 10:11:30)
Difficulty: 3 of 5Under Find this word (in Word Problems)
Posted on 2017-07-31 (7 Comments)
Solution Funny... (spoilers) by Charlie (2017-07-31 10:27:48)
Difficulty: 4 of 5Under Add'em all ! (in Numbers)
Posted on 2017-07-27 (3 Comments)
Solution computer solution (spoiler) by Charlie (2017-07-27 10:30:14)
Difficulty: 3 of 5Under Pandigitals Divided by 11 (in Numbers)
Posted on 2017-07-23 (4 Comments)
Some Thoughts computer exploration by Charlie (2017-07-23 10:39:48)
Difficulty: 3 of 5Under Almost-pandigital sets (in Numbers)
Posted on 2017-07-22 (1 Comments)
Solution computer solution by Charlie (2017-07-22 11:32:40)
Difficulty: 3 of 5Under 2 bases (in Numbers)
Posted on 2017-07-21 (2 Comments)
Solution computer solution (spoiler) by Charlie (2017-07-21 10:47:40)
Difficulty: 2 of 5Under 3 and 4-digit numbers (in Numbers)
Posted on 2017-07-17 (6 Comments)
re(3): Just counting (spoiler) by Charlie (2017-07-17 21:59:59)
re: Just counting (spoiler) by Charlie (2017-07-17 13:53:40)
Difficulty: 3 of 5Under Brazilian numbers (in Sequences)
Posted on 2017-07-15 (4 Comments)
Program had a bug -- fixed it by Charlie (2017-07-15 12:36:30)
Difficulty: 4 of 5Under Unpainting Black (in Probability)
Posted on 2017-07-14 (5 Comments)
Details of the results by Charlie (2017-07-15 11:29:16)
Solution corrected program with revised answer by Charlie (2017-07-14 22:20:16)
Some Thoughts proposed computer solution by Charlie (2017-07-14 17:05:24)
re: Preliminary work & thoughts by Charlie (2017-07-14 10:13:03)
Difficulty: 3 of 5Under Make the proof full-proof (in Word Problems)
Posted on 2017-07-11 (1 Comments)
Solution first the computer,then a human correction by Charlie (2017-07-11 10:48:27)
Difficulty: 3 of 5Under Pythagorean H/L ratios (in Just Math)
Posted on 2017-07-08 (2 Comments)
Solution computer solution by Charlie (2017-07-08 11:49:48)
Difficulty: 4 of 5Under Commutative Exponentiation (in Just Math)
Posted on 2017-07-07 (6 Comments)
Some Thoughts exploration by Charlie (2017-07-07 14:22:36)
Difficulty: 4 of 5Under Just add 2 letters (in Word Problems)
Posted on 2017-07-06 (2 Comments)
Solution computer findings (spoilers) by Charlie (2017-07-06 09:53:55)
Difficulty: 3 of 5Under 4 couples make a new word (in Word Problems)
Posted on 2017-07-04 (3 Comments)
The preceding subject should have been computer solution (spoiler) by Charlie (2017-07-04 13:38:54)
Solution No Subject by Charlie (2017-07-04 13:37:01)
Difficulty: 2 of 5Under Larger area / larger perimeter (in Numbers)
Posted on 2017-07-03 (3 Comments)
Solution computer solution by Charlie (2017-07-03 14:24:05)
Difficulty: 3 of 5Under 38s and Bunches of 1s (in Numbers)
Posted on 2017-06-30 (7 Comments)
re(2): No proof but a pattern found by Charlie (2017-06-30 10:14:56)
Some Thoughts No proof but a pattern found by Charlie (2017-06-30 09:04:10)
Difficulty: 3 of 5Under Square Egyptians (in Numbers)
Posted on 2017-06-28 (1 Comments)
Solution computer solution by Charlie (2017-06-28 13:59:04)
Difficulty: 3 of 5Under Words and hints (in General)
Posted on 2017-06-27 (1 Comments)
Solution computer aided solution by Charlie (2017-06-27 12:23:17)
Difficulty: 3 of 5Under 2017 to start with (in Numbers)
Posted on 2017-06-23 (7 Comments)
re(2): computer results (spoilers) extended by Charlie (2017-06-24 17:32:15)
program by Charlie (2017-06-23 18:17:48)
Solution computer results (spoilers) by Charlie (2017-06-23 18:11:50)
Difficulty: 3 of 5Under Letters to digits to letters (in Numbers)
Posted on 2017-06-22 (1 Comments)
Solution computer solution by Charlie (2017-06-22 10:34:01)
Difficulty: 3 of 5Under Odd Egyptians (in Numbers)
Posted on 2017-06-21 (2 Comments)
re: Programming exercise (spoiler); 20/20 hindsight by Charlie (2017-06-21 21:53:57)
Solution Programming exercise (spoiler); 20/20 hindsight by Charlie (2017-06-21 16:02:27)
Difficulty: 3 of 5Under Make It Even Again (in Probability)
Posted on 2017-06-20 (4 Comments)
Some Thoughts computer findings by Charlie (2017-06-20 15:18:19)
Difficulty: 2 of 5Under Punchline I (in Word Problems)
Posted on 2017-06-19 (3 Comments)
Solution Part 2: Of course it was... by Charlie (2017-06-19 14:37:35)
Difficulty: 3 of 5Under Love story (in General)
Posted on 2017-06-17 (1 Comments)
Solution computer solution by Charlie (2017-06-17 18:49:13)
Difficulty: 2 of 5Under Candy lover (in Liars and Knights)
Posted on 2017-06-12 (3 Comments)
Solution solution by Charlie (2017-06-12 13:56:57)
Difficulty: 3 of 5Under A madness sequence (50 digits) (in Sequences)
Posted on 2017-06-11 (1 Comments)
Solution solution by Charlie (2017-06-11 15:58:14)
Difficulty: 2 of 5Under Add another line (in General)
Posted on 2017-06-10 (6 Comments)
re(4): solution a typo by Charlie (2017-06-11 14:52:18)
re(2): solution please correct- spoiler by Charlie (2017-06-11 10:04:49)
Solution solution by Charlie (2017-06-10 10:52:26)
Difficulty: 4 of 5Under A powerful anagram (in Word Problems)
Posted on 2017-06-09 (2 Comments)
Solution annotated computer listing by Charlie (2017-06-09 18:24:36)
Difficulty: 1 of 5Under 18 is not enough (in Sequences)
Posted on 2017-06-06 (2 Comments)
Solution solution by Charlie (2017-06-06 11:22:53)
Difficulty: 3 of 5Under Red vs Black Cuts (in Numbers)
Posted on 2017-06-05 (8 Comments)
Solution solution by Charlie (2017-06-05 10:43:06)
Difficulty: 3 of 5Under Ulam numbers (in Numbers)
Posted on 2017-06-03 (5 Comments)
re: The proof and the bonus by Charlie (2017-06-03 14:34:24)
Solution The proof and the bonus by Charlie (2017-06-03 14:31:38)
Difficulty: 3 of 5Under Memory Match Game (in Probability)
Posted on 2017-05-31 (9 Comments)
re: Question by Charlie (2017-06-02 04:57:16)
re(3): computer discovery by Charlie (2017-06-01 10:32:45)
re(2): computer discovery by Charlie (2017-06-01 08:58:32)
Solution computer discovery by Charlie (2017-05-31 16:20:20)
Difficulty: 3 of 5Under N dice (in Probability)
Posted on 2017-05-25 (3 Comments)
Solution computer aided solution by Charlie (2017-05-25 12:14:14)
Difficulty: 3 of 5Under Higher Powers of Eleven (in Numbers)
Posted on 2017-05-24 (4 Comments)
re: Analytic Solution by Charlie (2017-05-26 15:45:40)
Solution computer solution by Charlie (2017-05-24 11:32:24)
Difficulty: 2 of 5Under Four balls (in Probability)
Posted on 2017-05-19 (22 Comments)
re(4): Who's right by Charlie (2017-05-21 22:13:24)
Solution re(2): Who's right by Charlie (2017-05-21 16:37:54)
re: I agree with Brian by Charlie (2017-05-19 23:01:06)
Solution Solution by Charlie (2017-05-19 11:00:34)
Difficulty: 3 of 5Under Hands off! (in Weights and Scales)
Posted on 2017-05-16 (3 Comments)
Solution Two ways of looking at it both agree by Charlie (2017-05-16 10:36:39)
Difficulty: 3 of 5Under Inder Taneja's discovery (in Numbers)
Posted on 2017-05-11 (4 Comments)
re: How far could the list be extended? by Charlie (2017-05-12 13:50:00)
How far could the list be extended? by Charlie (2017-05-12 13:17:11)
A step beyond Taneja's list by Charlie (2017-05-11 22:42:29)
Some Thoughts some computer results by Charlie (2017-05-11 14:08:31)
Difficulty: 3 of 5Under One more line (in Logic)
Posted on 2017-05-10 (4 Comments)
Some Thoughts trivial solution? -- or is this not the solution? by Charlie (2017-05-10 10:32:24)
Difficulty: 3 of 5Under The length of the belt (in Geometry)
Posted on 2017-05-09 (5 Comments)
Solution solution by Charlie (2017-05-09 09:35:50)
Difficulty: 3 of 5Under No software allowed ! (in Numbers)
Posted on 2017-05-07 (6 Comments)
re(2): Solution by Charlie (2017-05-07 16:26:51)
Difficulty: 3 of 5Under All ten (in Numbers)
Posted on 2017-05-06 (1 Comments)
Solution computer solution by Charlie (2017-05-06 13:35:05)
Difficulty: 4 of 5Under Sum and Difference II (in Numbers)
Posted on 2017-05-05 (1 Comments)
Solution computer solution by Charlie (2017-05-05 13:47:42)
Difficulty: 3 of 5Under Pandigital + (in Probability)
Posted on 2017-05-03 (3 Comments)
Solution Analytic solution with Computer calculations by Charlie (2017-05-03 14:19:51)
Difficulty: 3 of 5Under The smallest non-conformist (in Numbers)
Posted on 2017-05-02 (3 Comments)
Solution with computer assistance by Charlie (2017-05-02 12:47:47)
Difficulty: 2 of 5Under A cent or more? (in Probability)
Posted on 2017-05-01 (2 Comments)
Some Thoughts conditional nature of the problem (spoilers) by Charlie (2017-05-01 08:56:54)
Difficulty: 3 of 5Under Smallest pandifibo number (in Numbers)
Posted on 2017-04-29 (1 Comments)
Solution UBASIC solution by Charlie (2017-04-29 13:57:59)
Difficulty: 2 of 5Under Prime with no prime digits (in Numbers)
Posted on 2017-04-25 (5 Comments)
BTW, why there are no 5's by Charlie (2017-04-28 15:38:57)
re(2): solution via computer -my remarks by Charlie (2017-04-26 11:45:50)
Solution solution via computer by Charlie (2017-04-25 09:18:01)
Difficulty: 3 of 5Under Liars can figure (in Liars and Knights)
Posted on 2017-04-24 (4 Comments)
re: I am between two answers (spoiler) by Charlie (2017-04-24 10:31:01)
Difficulty: 3 of 5Under Is it a conic? (in Geometry)
Posted on 2017-04-19 (7 Comments)
I guess my computer finding actually agrees, as do both others. by Charlie (2017-04-19 20:36:36)
Some Thoughts Computer findings -- probably wrong, based on previous posts by Charlie (2017-04-19 14:09:46)
Difficulty: 2 of 5Under A factorial in seconds (in Numbers)
Posted on 2017-04-18 (6 Comments)
Solution solution in under 200 seconds with calculator by Charlie (2017-04-18 09:21:01)
Difficulty: 2 of 5Under Polygon Overlap (in Geometry)
Posted on 2017-04-17 (1 Comments)
Solution solution by Charlie (2017-04-17 10:49:34)
Difficulty: 3 of 5Under Pandigital and square (in Numbers)
Posted on 2017-04-15 (6 Comments)
Solution computer solution by Charlie (2017-04-15 14:22:31)
Difficulty: 4 of 5Under Growth Potential (in Algorithms)
Posted on 2017-04-13 (4 Comments)
Solution Two proposed proofs by Charlie (2017-04-13 10:03:35)
Difficulty: 3 of 5Under Names in Boxes (in Logic)
Posted on 2017-04-09 (10 Comments)
re(3): Loops by Charlie (2017-04-12 14:41:51)
re: Loops by Charlie (2017-04-12 10:54:02)
Difficulty: 3 of 5Under Excellent numbers (in Numbers)
Posted on 2017-04-08 (3 Comments)
Solution computer solution: 6-, 8- and 10-digits by Charlie (2017-04-08 12:17:11)
Difficulty: 4 of 5Under The magnificent twelve (in Numbers)
Posted on 2017-04-07 (2 Comments)
Solution computer solution (spoiler) -- with a caveat on the restrictions by Charlie (2017-04-07 12:26:51)
Difficulty: 3 of 5Under Three mirrored multiplications (in Numbers)
Posted on 2017-04-02 (1 Comments)
Solution computer solution by Charlie (2017-04-02 12:40:21)
Difficulty: 3 of 5Under Prime power puzzle (in Just Math)
Posted on 2017-04-01 (8 Comments)
re(2): Half A proof by Charlie (2017-04-02 19:08:32)
re: computer so far by Charlie (2017-04-02 09:56:47)
computer so far by Charlie (2017-04-01 15:57:10)
Difficulty: 2 of 5Under Why is it D2? (in Numbers)
Posted on 2017-03-27 (4 Comments)
In the other spirit by Charlie (2017-03-27 11:15:37)
part 2 by Charlie (2017-03-27 10:41:15)
Solution A different answer by Charlie (2017-03-27 10:37:55)
Difficulty: 4 of 5Under 1 is one of them (in Numbers)
Posted on 2017-03-25 (2 Comments)
Solution computer solution by Charlie (2017-03-25 14:51:18)
Difficulty: 3 of 5Under True for nine and up (in Numbers)
Posted on 2017-03-24 (3 Comments)
Solution With some computer aid by Charlie (2017-03-24 11:00:45)
Difficulty: 2 of 5Under Elongated Pentagonal Orthocupola's vertices (in Shapes)
Posted on 2017-03-20 (3 Comments)
Solution re: solution by Charlie (2017-03-20 12:31:07)
Difficulty: 2 of 5Under Leave no stone unturned (in Logic)
Posted on 2017-03-19 (5 Comments)
re: Other cases by Charlie (2017-03-19 14:33:33)
Solution solution by Charlie (2017-03-19 13:32:00)
Difficulty: 4 of 5Under A rare palindrome (in Numbers)
Posted on 2017-03-18 (1 Comments)
Solution computer solution by Charlie (2017-03-18 13:48:46)
Difficulty: 4 of 5Under Primes and factors (in Numbers)
Posted on 2017-03-17 (2 Comments)
Solution computer solution carried beyond by Charlie (2017-03-17 10:23:55)
Difficulty: 3 of 5Under Same side story (in Probability)
Posted on 2017-03-16 (5 Comments)
Solution re: Corrected solution by Charlie (2017-03-29 10:46:12)
Difficulty: 2 of 5Under Integers and their sums of digits (in Just Math)
Posted on 2017-03-13 (3 Comments)
computer solution by Charlie (2017-03-19 11:38:14)
Difficulty: 2 of 5Under Facing each other (in Just Math)
Posted on 2017-03-07 (2 Comments)
Solution solution (spoiler) by Charlie (2017-03-07 09:39:18)
Difficulty: 3 of 5Under Only real x counted (in Probability)
Posted on 2017-03-01 (3 Comments)
Solution solution (spoiler) by Charlie (2017-03-01 10:52:32)
Difficulty: 2 of 5Under a KISS puzzle (in Just Math)
Posted on 2017-02-27 (2 Comments)
Solution solution by Charlie (2017-02-27 10:10:00)
Difficulty: 3 of 5Under Areas ratio (in Probability)
Posted on 2017-02-24 (1 Comments)
Solution solution by Charlie (2017-02-24 11:18:28)
Difficulty: 3 of 5Under Odds are ... (in Probability)
Posted on 2017-02-14 (8 Comments)
Higher numbers before overflow by Charlie (2017-02-14 11:42:28)
probabilities by Charlie (2017-02-14 11:34:26)
re: Argument (no math) by Charlie (2017-02-14 10:03:01)
Difficulty: 4 of 5Under Most words from your word (in Word Problems)
Posted on 2017-02-10 (10 Comments)
re: some computer results -- the program by Charlie (2017-02-10 23:31:27)
Some Thoughts some computer results by Charlie (2017-02-10 23:27:17)
Difficulty: 3 of 5Under Lies, truth, and logic (in Liars and Knights)
Posted on 2017-02-09 (2 Comments)
Solution Lots of solutions even between 20 and 40 by Charlie (2017-02-09 21:31:10)
Difficulty: 3 of 5Under A better approximate Pythagorean Theorem (in Calculus)
Posted on 2017-02-08 (1 Comments)
Some Thoughts heuristic estimate based on computer program by Charlie (2017-02-08 10:51:42)
Difficulty: 3 of 5Under Forward and Backward Word Values (in General)
Posted on 2017-02-07 (5 Comments)
Solution I don't know what truncated my previous list, but by Charlie (2017-02-08 08:28:57)
Solution computer solution (spoiler) by Charlie (2017-02-07 12:51:37)
Difficulty: 2 of 5Under Given VI, evaluate VII (in Sequences)
Posted on 2017-02-01 (1 Comments)
Solution computer solution (spoiler) by Charlie (2017-02-01 10:55:25)
Difficulty: 3 of 5Under Multiples with 3 (in Numbers)
Posted on 2017-01-31 (3 Comments)
Solution computer solution, taken beyond by Charlie (2017-01-31 12:59:29)
Difficulty: 2 of 5Under Opening your eyes (in Famous Riddles)
Posted on 2017-01-28 (2 Comments)
A Google search on the wording by Charlie (2017-01-29 12:49:59)
Difficulty: 4 of 5Under A false conjecture (in Numbers)
Posted on 2017-01-27 (7 Comments)
re: computer attempt by Charlie (2017-01-27 14:24:25)
Some Thoughts computer attempt by Charlie (2017-01-27 12:37:47)
Difficulty: 3 of 5Under 1,3,8 ...extend! (in Numbers)
Posted on 2017-01-26 (4 Comments)
Some Thoughts computer finding by Charlie (2017-01-26 14:38:53)
Difficulty: 2 of 5Under Ain't she clever? (in Just Math)
Posted on 2017-01-24 (1 Comments)
Solution solution given certain assumptions by Charlie (2017-01-24 11:15:52)
Difficulty: 3 of 5Under Topical Quotation V (in Word Problems)
Posted on 2017-01-18 (1 Comments)
Hints/Tips Hint by Charlie (2017-01-19 22:30:20)
Difficulty: 3 of 5Under An interesting recurrence (in Numbers)
Posted on 2017-01-17 (5 Comments)
computer solution by Charlie (2017-01-17 11:20:42)
Difficulty: 2 of 5Under Age Progression (in Numbers)
Posted on 2017-01-16 (3 Comments)
the cases -- to age 100 by Charlie (2017-01-16 16:01:35)
Difficulty: 3 of 5Under 2nd grade math (in Probability)
Posted on 2017-01-12 (4 Comments)
re: solution -- so about that math test by Charlie (2017-01-13 10:55:22)
re: solution -- simulation verification by Charlie (2017-01-12 21:38:09)
Solution solution by Charlie (2017-01-12 14:48:35)
Difficulty: 3 of 5Under (x−y)^ n = xy (in Just Math)
Posted on 2017-01-07 (2 Comments)
Some Thoughts computer exploration by Charlie (2017-01-07 14:46:42)
Difficulty: 2 of 5Under From Tangent to Circle (in Geometry)
Posted on 2017-01-04 (4 Comments)
Some Thoughts solution for part 2; outline for part 1 by Charlie (2017-01-04 13:38:09)
Difficulty: 2 of 5Under Counting brackets (in Just Math)
Posted on 2017-01-03 (1 Comments)
Solution computer exploration and solution by Charlie (2017-01-03 15:22:32)
Difficulty: 2 of 5Under Which is the biggest? (in Numbers)
Posted on 2017-01-02 (2 Comments)
Solution solution by Charlie (2017-01-02 10:43:01)
Difficulty: 4 of 5Under Congruent Incircles (in Geometry)
Posted on 2017-01-01 (6 Comments)
Solution numerical computer solution by Charlie (2017-01-01 12:43:06)
Difficulty: 4 of 5Under Skill or food? (in Numbers)
Posted on 2016-12-28 (5 Comments)
Some Thoughts re(3): Crazy for coconuts extra hint by Charlie (2016-12-29 10:39:38)
Solution software solution by Charlie (2016-12-28 11:29:28)
Difficulty: 3 of 5Under Who discovered the secret? (in Logic)
Posted on 2016-12-27 (4 Comments)
Solution solution by Charlie (2016-12-27 09:45:00)
Difficulty: 3 of 5Under Nothing's perfect. (in Sequences)
Posted on 2016-12-24 (1 Comments)
Some Thoughts computer exploration by Charlie (2016-12-26 08:56:34)
Difficulty: 3 of 5Under A chain of powers (in Sequences)
Posted on 2016-12-22 (1 Comments)
Some Thoughts computer observations by Charlie (2016-12-22 09:37:15)
Difficulty: 2 of 5Under Prime candidates (in Just Math)
Posted on 2016-12-20 (5 Comments)
Some Thoughts computer exploration by Charlie (2016-12-20 13:34:08)
Difficulty: 1 of 5Under Legally Blonde (in Liars and Knights)
Posted on 2016-12-19 (8 Comments)
Solution another way by Charlie (2016-12-19 10:31:34)
Difficulty: 3 of 5Under Traveling with Luggage (in Logic)
Posted on 2016-12-15 (2 Comments)
Solution computer solution (spoiler) by Charlie (2016-12-15 10:38:16)
Difficulty: 3 of 5Under Decimal and Binary Representation (in Numbers)
Posted on 2016-12-13 (3 Comments)
Solution computer solution (spoiler) by Charlie (2016-12-14 10:23:49)
re: hint based somewhat on computer findings by Charlie (2016-12-13 14:11:27)
Hints/Tips hint based somewhat on computer findings by Charlie (2016-12-13 10:31:41)
Difficulty: 3 of 5Under Pentagon Partitions (in Shapes)
Posted on 2016-12-11 (3 Comments)
re: A solution (spoiler) by Charlie (2016-12-12 11:19:42)
Difficulty: 3 of 5Under Gluing Cubes (in Shapes)
Posted on 2016-12-08 (1 Comments)
Solution proposed solution by Charlie (2016-12-08 10:28:20)
Difficulty: 4 of 5Under A ragman from 3 to 10 (in Word Problems)
Posted on 2016-12-07 (2 Comments)
9 and 10 by Charlie (2016-12-07 13:32:40)
computer solution for lengths 5 through 8 by Charlie (2016-12-07 11:08:02)
Difficulty: 2 of 5Under Moving Two Rooks (in Games)
Posted on 2016-12-06 (2 Comments)
Some Thoughts re: For the Win (spoiler) by Charlie (2016-12-06 15:37:11)
Difficulty: 3 of 5Under Four integers (in Numbers)
Posted on 2016-12-04 (8 Comments)
Solution extending the limit to 1700 (spoiler) by Charlie (2016-12-04 11:05:42)
Solution computer solution (spoiler) by Charlie (2016-12-04 11:01:08)
Difficulty: 3 of 5Under A biased random walk (in Probability)
Posted on 2016-12-01 (1 Comments)
Some Thoughts computer exploration by Charlie (2016-12-01 09:21:44)
Difficulty: 4 of 5Under 7+8=12 ?? (in Just Math)
Posted on 2016-11-30 (3 Comments)
Solution computer solution (spoiler) by Charlie (2016-11-30 10:29:30)
Difficulty: 2 of 5Under composite function (in Calculus)
Posted on 2016-11-29 (2 Comments)
Solution by graphing by Charlie (2016-11-29 13:59:19)
Difficulty: 3 of 5Under 26 out of 50 (in Just Math)
Posted on 2016-11-25 (10 Comments)
re: Inelegant proof? by Charlie (2016-11-28 08:05:55)
Difficulty: 2 of 5Under Prime repunits (in Numbers)
Posted on 2016-11-24 (4 Comments)
Some Thoughts computer exploration by Charlie (2016-11-24 17:59:10)
Difficulty: 3 of 5Under On the same floor (in Just Math)
Posted on 2016-11-22 (13 Comments)
re: the computer says - - my mistake by Charlie (2016-11-23 20:22:57)
Solution the computer says by Charlie (2016-11-23 20:14:31)
Solution re(2): How many...... g o o f by Charlie (2016-11-22 22:17:10)
Solution How many by Charlie (2016-11-22 11:23:45)
Difficulty: 3 of 5Under At least twice (in Numbers)
Posted on 2016-11-17 (5 Comments)
Solution below four trillion by Charlie (2016-11-17 15:18:11)
re(2): a star ... a hint by Charlie (2016-11-17 12:57:26)
Some Thoughts a start by Charlie (2016-11-17 09:31:01)
Difficulty: 3 of 5Under Maximizing the sum (in Numbers)
Posted on 2016-11-16 (4 Comments)
the program by Charlie (2016-11-16 10:22:00)
part b in more concise form by Charlie (2016-11-16 10:19:56)
list continued by Charlie (2016-11-16 10:15:12)
Solution e pluribus duo by Charlie (2016-11-16 10:13:46)
Difficulty: 2 of 5Under A radical problem (in Just Math)
Posted on 2016-11-15 (2 Comments)
Solution solution by Charlie (2016-11-15 10:39:36)
Difficulty: 1 of 5Under Don't be confused (in General)
Posted on 2016-11-14 (4 Comments)
Some Thoughts using a calculator by Charlie (2016-11-14 12:41:24)
Difficulty: 3 of 5Under Linear*Quadratic = Square (in Just Math)
Posted on 2016-11-12 (2 Comments)
Some Thoughts computer exploration by Charlie (2016-11-12 10:59:45)
Difficulty: 3 of 5Under 6 given, 2 wanted (in Sequences)
Posted on 2016-11-11 (5 Comments)
re(3): Hint #2: by Charlie (2016-11-14 07:53:59)
Solution re: Hint #2: by Charlie (2016-11-13 13:20:20)
Difficulty: 3 of 5Under 63 Division Decision (in Just Math)
Posted on 2016-11-10 (3 Comments)
Solution computer solution by Charlie (2016-11-10 12:42:32)
Difficulty: 4 of 5Under AABBCC and Perfect Square (in Just Math)
Posted on 2016-11-09 (6 Comments)
Solution computer solution by Charlie (2016-11-09 13:37:06)
Difficulty: 3 of 5Under Lucas Digits Look (in Just Math)
Posted on 2016-11-07 (10 Comments)
re: solution+ by Charlie (2016-11-07 10:59:44)
Solution solution+ by Charlie (2016-11-07 10:54:14)
Difficulty: 3 of 5Under Your conclusion requested (in Logic)
Posted on 2016-11-03 (9 Comments)
re(4): Answer .... to your questions by Charlie (2016-11-12 15:07:54)
re: Answer by Charlie (2016-11-10 15:43:37)
Some Thoughts My conclusion by Charlie (2016-11-03 09:22:32)
Difficulty: 3 of 5Under A peculiar triplet (in Just Math)
Posted on 2016-11-01 (7 Comments)
re(2): The triple without complete proof by Charlie (2016-11-01 13:42:44)
re: The triple without complete proof by Charlie (2016-11-01 13:40:17)
Difficulty: 3 of 5Under Equal Temperatures (in Just Math)
Posted on 2016-10-31 (6 Comments)
Solution re(2): computer solution by Charlie (2016-10-31 19:19:55)
re: No Subject by Charlie (2016-10-31 11:54:31)
Solution computer solution by Charlie (2016-10-31 11:53:55)
Difficulty: 3 of 5Under Reciprocal Period Poser (in Just Math)
Posted on 2016-10-29 (2 Comments)
Solution computer solution by Charlie (2016-10-29 10:49:24)
Difficulty: 4 of 5Under Symmetry helps! (in Just Math)
Posted on 2016-10-26 (7 Comments)
Some Thoughts computer exploration by Charlie (2016-10-26 12:08:23)
Difficulty: 3 of 5Under Figuring Forty-Nine and Sequence (in Sequences)
Posted on 2016-10-25 (2 Comments)
Some Thoughts No proof, but ... by Charlie (2016-10-25 09:18:28)
Difficulty: 3 of 5Under Totient Trial (in Just Math)
Posted on 2016-10-24 (2 Comments)
Solution computer solution by Charlie (2016-10-24 19:16:26)
Difficulty: 4 of 5Under Prime and Twice Square (in Just Math)
Posted on 2016-10-22 (4 Comments)
Some Thoughts re: A solution by Charlie (2016-10-22 15:54:41)
Difficulty: 3 of 5Under A little twist (in Just Math)
Posted on 2016-10-21 (4 Comments)
re(2): computer solution.....yes,but... by Charlie (2016-10-22 08:50:05)
Solution computer solution by Charlie (2016-10-21 14:46:29)
Difficulty: 3 of 5Under Dodecahedron Chance Determination (in Probability)
Posted on 2016-10-20 (6 Comments)
re(3): clarification by Charlie (2016-10-20 16:48:08)
re(2): clarification by Charlie (2016-10-20 16:04:43)
For 1 - 12 by Charlie (2016-10-20 15:30:10)
Solution solution for puzzle as originally given by Charlie (2016-10-20 15:13:11)
Difficulty: 3 of 5Under Why not marry? (in Logic)
Posted on 2016-10-19 (6 Comments)
Interesting variation in first cousin marriage in U.S. by Charlie (2016-10-19 14:37:22)
Some Thoughts Two ways. by Charlie (2016-10-19 08:55:46)
Difficulty: 3 of 5Under Positively Positive (in Just Math)
Posted on 2016-10-18 (7 Comments)
Some Thoughts findings by Charlie (2016-10-18 16:18:25)
Difficulty: 3 of 5Under Mismatch Muse (in Logic)
Posted on 2016-10-18 (1 Comments)
Solution proposed solution by Charlie (2016-10-18 10:58:05)
Difficulty: 3 of 5Under Prime and Six Settlement (in Just Math)
Posted on 2016-10-17 (4 Comments)
Solution solution by Charlie (2016-10-17 10:51:13)
Difficulty: 3 of 5Under get the real part of the problem (in Just Math)
Posted on 2016-10-16 (1 Comments)
Solution solution by Charlie (2016-10-16 11:13:54)
Difficulty: 4 of 5Under this is the range of my root (in Just Math)
Posted on 2016-10-14 (1 Comments)
Solution analysis then computation by Charlie (2016-10-14 15:41:10)
Difficulty: 3 of 5Under Phibobrick's dimensions (in Numbers)
Posted on 2016-10-14 (1 Comments)
Solution proposed solution by Charlie (2016-10-14 11:45:47)
Difficulty: 3 of 5Under River Cross Resolution (in Weights and Scales)
Posted on 2016-10-12 (1 Comments)
Solution computer solution by Charlie (2016-10-12 12:21:50)
Difficulty: 3 of 5Under Adding consecutive primes (in Just Math)
Posted on 2016-10-11 (1 Comments)
Solution computer solution by Charlie (2016-10-11 13:45:47)
Difficulty: 3 of 5Under Four Digit Arithmetic (in Just Math)
Posted on 2016-10-11 (2 Comments)
Solution computer solution by Charlie (2016-10-11 09:52:41)
Difficulty: 3 of 5Under Bridge Cross Baffle (in Logic)
Posted on 2016-10-10 (3 Comments)
Solution Wouldda, Coudda, Shouldda done it by computer by Charlie (2016-10-10 15:45:39)
Solution proposed solution by Charlie (2016-10-10 12:17:24)
Difficulty: 4 of 5Under polynomial problem 3 (in Just Math)
Posted on 2016-10-08 (2 Comments)
Solution D4? (spoiler) by Charlie (2016-10-08 09:32:36)
Difficulty: 2 of 5Under 2 sums modulo 7 (in Probability)
Posted on 2016-10-05 (3 Comments)
Solution re(2): some computed values by Charlie (2016-10-05 18:12:19)
re: some computed values by Charlie (2016-10-05 14:49:05)
Some Thoughts some computed values by Charlie (2016-10-05 14:43:35)
Difficulty: 3 of 5Under Additional solutions, please (in Just Math)
Posted on 2016-10-03 (3 Comments)
Solution re(2): computer solution -- final part by Charlie (2016-10-03 18:10:37)
Solution re: computer solution -- continued by Charlie (2016-10-03 18:09:13)
Solution computer solution by Charlie (2016-10-03 18:07:32)
Difficulty: 3 of 5Under Unit Cube Paint Undertaking (in Shapes)
Posted on 2016-09-28 (6 Comments)
Solution Considering all the possibilities by Charlie (2016-09-28 15:29:47)
re: Interesting. by Charlie (2016-09-28 12:23:22)
Difficulty: 4 of 5Under No data - just a weighing problem (in General)
Posted on 2016-09-27 (2 Comments)
re: My solution by Charlie (2016-09-27 16:02:30)
Difficulty: 3 of 5Under Numbers' quantifiers (in Logic)
Posted on 2016-09-23 (4 Comments)
re(2): a try by Charlie (2016-09-23 21:43:17)
Some Thoughts a try by Charlie (2016-09-23 15:48:50)
Difficulty: 2 of 5Under Nonnegative Sum Nuance (in Probability)
Posted on 2016-09-23 (1 Comments)
Solution solution by Charlie (2016-09-23 10:44:58)
Difficulty: 3 of 5Under A cyclic path (in Geometry)
Posted on 2016-09-21 (1 Comments)
Some Thoughts first guess by Charlie (2016-09-21 12:43:29)
Difficulty: 1 of 5Under Biting the Apple (in Tricks)
Posted on 2016-09-21 (3 Comments)
re: One way to do it -- close by Charlie (2016-09-21 11:15:35)
Difficulty: 3 of 5Under Real roots from three dice (in Probability)
Posted on 2016-09-20 (1 Comments)
Solution computer-aided solution by Charlie (2016-09-20 15:43:45)
Difficulty: 3 of 5Under Unbiased and Biased Choice (in Probability)
Posted on 2016-09-19 (1 Comments)
Solution solution by Charlie (2016-09-19 10:56:17)
Difficulty: 1 of 5Under Provide the next number (in Sequences)
Posted on 2016-09-18 (2 Comments)
Solution that, I guess, was hint enough by Charlie (2016-09-24 13:11:25)
Difficulty: 3 of 5Under GCD and LCM (in Just Math)
Posted on 2016-09-16 (1 Comments)
Solution solution by Charlie (2016-09-16 10:18:50)
Difficulty: 3 of 5Under Ascending Hexadecimal Digits (in Just Math)
Posted on 2016-09-15 (1 Comments)
Solution solution by Charlie (2016-09-15 10:08:44)
Difficulty: 3 of 5Under NegaTernary Nuance (in Algorithms)
Posted on 2016-09-14 (1 Comments)
Solution solution by Charlie (2016-09-14 11:01:03)
Difficulty: 3 of 5Under Duodecimal Pandigital Divisibility Device (in Algorithms)
Posted on 2016-09-13 (2 Comments)
Solution Choice of two algorithms by Charlie (2016-09-13 09:51:04)
Difficulty: 2 of 5Under Think twice (in Just Math)
Posted on 2016-09-12 (4 Comments)
Solution The apparent solution by Charlie (2016-09-12 10:33:10)
Difficulty: 2 of 5Under Finding the hidden digit (in Tricks)
Posted on 2016-09-09 (1 Comments)
Solution solution by Charlie (2016-09-09 10:54:07)
Difficulty: 3 of 5Under Dice Roll Resolution (in Probability)
Posted on 2016-09-08 (4 Comments)
re: Attempt at simulating part ii by Charlie (2016-09-08 13:56:17)
Attempt at simulating part ii by Charlie (2016-09-08 13:29:23)
Some Thoughts Actual part i simulation by Charlie (2016-09-08 13:11:57)
Some Thoughts simulation of a simpler case by Charlie (2016-09-08 12:10:15)
Difficulty: 3 of 5Under Counting ARATs (in Numbers)
Posted on 2016-09-07 (4 Comments)
Some Thoughts Corrected version for c<100,000 by Charlie (2016-09-07 12:57:02)
re: programming mistake; also need faster computer/programming language by Charlie (2016-09-07 10:41:16)
Some Thoughts programming mistake; also need faster computer/programming language by Charlie (2016-09-07 10:23:17)
Difficulty: 3 of 5Under Nineteenth Exponent Exposition (in Just Math)
Posted on 2016-09-06 (3 Comments)
Some Thoughts An analytic start and a calculator finish by Charlie (2016-09-06 15:42:04)
Difficulty: 2 of 5Under 1248 must be included (in Sequences)
Posted on 2016-09-06 (3 Comments)
Solution Brute force (computer solution) by Charlie (2016-09-06 10:19:42)
Difficulty: 3 of 5Under Form Finding From Solution (in Just Math)
Posted on 2016-09-05 (2 Comments)
Solution seems to be a solution by Charlie (2016-09-05 12:35:06)
Difficulty: 1 of 5Under Getting 189 (in Numbers)
Posted on 2016-09-05 (1 Comments)
Solution solution by Charlie (2016-09-05 10:05:38)
Difficulty: 3 of 5Under Tetra Anagram Trial (in Word Problems)
Posted on 2016-09-02 (4 Comments)
Some Thoughts Computer exploration and a guess by Charlie (2016-09-02 09:42:55)
Difficulty: 1 of 5Under Empty or fool ?? (in Logic)
Posted on 2016-09-01 (1 Comments)
Solution solution by Charlie (2016-09-01 12:57:44)
Difficulty: 3 of 5Under Divisibility Property (in Numbers)
Posted on 2016-08-31 (2 Comments)
Solution With software by Charlie (2016-08-31 11:12:32)
Difficulty: 3 of 5Under Near Fermat Nuance (in Just Math)
Posted on 2016-08-30 (2 Comments)
Solution computer solution by Charlie (2016-08-30 15:03:22)
Difficulty: 3 of 5Under Add missing letters (in Word Problems)
Posted on 2016-08-30 (3 Comments)
re: answer by Charlie (2016-08-31 07:43:17)
Difficulty: 3 of 5Under Random Chess Pieces Poser (in Probability)
Posted on 2016-08-29 (6 Comments)
Solution re(3): computer aided solution (corrected answer) by Charlie (2016-08-30 21:30:02)
re(3): computer aided solution by Charlie (2016-08-30 19:58:28)
re(2): computer aided solution by Charlie (2016-08-30 07:45:29)
computer aided solution by Charlie (2016-08-29 16:31:03)
Difficulty: 3 of 5Under Which is greater? (in Just Math)
Posted on 2016-08-28 (3 Comments)
Solution computer solution (spoiler) by Charlie (2016-08-28 10:29:43)
Difficulty: 3 of 5Under All rational numbers in (in Sequences)
Posted on 2016-08-26 (10 Comments)
re(2): From N/D to n @ jer & Charlie by Charlie (2016-08-29 07:27:49)
re: From N/D to n by Charlie (2016-08-28 22:27:57)
Difficulty: 3 of 5Under Powers of 3 (in Numbers)
Posted on 2016-08-25 (5 Comments)
Some Thoughts Computer exploration by Charlie (2016-08-25 14:11:11)
Difficulty: 2 of 5Under Labeling Minimum (in Weights and Scales)
Posted on 2016-08-25 (4 Comments)
re(2): Solution by Charlie (2016-08-25 14:08:39)
Difficulty: 3 of 5Under Eight Points (in Probability)
Posted on 2016-08-24 (3 Comments)
Just for curiosity, random points in a square by Charlie (2016-08-25 09:34:10)
Solution simulation by Charlie (2016-08-24 18:30:39)
Difficulty: 2 of 5Under Business is business (in Word Problems)
Posted on 2016-08-24 (6 Comments)
Solution re: Hint for previous solvers. by Charlie (2016-08-24 10:53:52)
Solution A short couplet by Charlie (2016-08-24 08:32:10)
Difficulty: 2 of 5Under Murder Muse Resolution (in Riddles)
Posted on 2016-08-23 (1 Comments)
Solution solution by Charlie (2016-08-23 12:37:08)
Difficulty: 3 of 5Under Year from Ratio (in General)
Posted on 2016-08-22 (3 Comments)
Solution re: No Subject by Charlie (2016-08-23 19:52:39)
Difficulty: 2 of 5Under Estimate a percentage (in Numbers)
Posted on 2016-08-22 (6 Comments)
Solution potential solution by Charlie (2016-08-22 10:03:49)
Difficulty: 3 of 5Under Covering a Cube with Strips (in Shapes)
Posted on 2016-08-18 (3 Comments)
Solution solution by Charlie (2016-08-18 17:03:06)
Difficulty: 3 of 5Under Guessing your birthdate (in Just Math)
Posted on 2016-08-18 (4 Comments)
re: part a by Charlie (2016-08-19 22:20:11)
Some Thoughts part b is easiest with a computer; part a not so much by Charlie (2016-08-18 11:05:32)
Difficulty: 3 of 5Under Summing up (in Sequences)
Posted on 2016-08-17 (2 Comments)
Solution solution by Charlie (2016-08-17 14:33:35)
Difficulty: 4 of 5Under 4 groups of 4 (in Word Problems)
Posted on 2016-08-16 (8 Comments)
re(2): with computer assistance by Charlie (2016-08-16 19:25:11)
Solution with computer assistance by Charlie (2016-08-16 13:48:36)
Some Thoughts first thoughts by Charlie (2016-08-16 13:05:33)
Difficulty: 2 of 5Under 240 divisors (in Just Math)
Posted on 2016-08-15 (1 Comments)
Solution Analytic guesses plus computer verification (spoiler) by Charlie (2016-08-15 10:27:39)
Difficulty: 3 of 5Under 1-2-3-4 Square (in Geometry)
Posted on 2016-08-12 (3 Comments)
Solution solutions by Charlie (2016-08-12 10:38:54)
Difficulty: 2 of 5Under Form 21 n Times II (in Numbers)
Posted on 2016-08-11 (5 Comments)
re: Full solution - SPOILER by Charlie (2016-08-11 09:06:28)
Difficulty: 3 of 5Under Find additional pairs (in Just Math)
Posted on 2016-08-08 (5 Comments)
re: computer solution by Charlie (2016-08-08 22:19:57)
Solution computer solution by Charlie (2016-08-08 22:12:14)
Difficulty: 3 of 5Under Binomial GCDs (in Just Math)
Posted on 2016-08-08 (2 Comments)
Solution Heuristic solution by Charlie (2016-08-08 14:34:12)
Difficulty: 2 of 5Under Visiting Toronto (in Numbers)
Posted on 2016-08-05 (1 Comments)
Solution computer solution by Charlie (2016-08-10 07:56:26)
Difficulty: 3 of 5Under Remainder Resolution from Multiple (in Just Math)
Posted on 2016-08-04 (5 Comments)
Solution computer solution by Charlie (2016-08-04 10:43:25)
Difficulty: 3 of 5Under Pandigital Multiples of 99 (in Numbers)
Posted on 2016-08-03 (2 Comments)
Solution solution by Charlie (2016-08-03 14:19:15)
Difficulty: 3 of 5Under Quadratic and Linear (in Just Math)
Posted on 2016-08-03 (2 Comments)
Solution computer solution by Charlie (2016-08-03 10:32:48)
Difficulty: 3 of 5Under Pentagon and Acute Probability (in Probability)
Posted on 2016-08-02 (1 Comments)
Solution solution by Charlie (2016-08-02 11:54:27)
Difficulty: 3 of 5Under Staggering Digits (in Just Math)
Posted on 2016-07-28 (4 Comments)
re: Solution by Charlie (2016-07-28 15:20:11)
Solution needed a computer by Charlie (2016-07-28 15:12:04)
Difficulty: 3 of 5Under A surprising prime gap (in Numbers)
Posted on 2016-07-27 (8 Comments)
re(5): My solution by Charlie (2016-08-01 07:57:10)
re(3): My solution by Charlie (2016-07-31 18:45:10)
re: My solution by Charlie (2016-07-30 09:13:56)
Solution computer solution by Charlie (2016-07-27 16:45:07)
Difficulty: 3 of 5Under A chain of command (in Just Math)
Posted on 2016-07-26 (2 Comments)
Solution solution if there's no trick by Charlie (2016-07-26 13:35:10)
Difficulty: 2 of 5Under Go back or double (in Sequences)
Posted on 2016-07-25 (5 Comments)
re: An uncertain shorthand for part II by Charlie (2016-07-26 15:04:35)
part 1 by Charlie (2016-07-25 10:17:43)
Difficulty: 3 of 5Under Seventh Term Settlement (in Sequences)
Posted on 2016-07-22 (10 Comments)
re: answer by Charlie (2016-07-22 10:39:59)
Solution computer solution by Charlie (2016-07-22 10:34:02)
Difficulty: 2 of 5Under Cute numbers (in Numbers)
Posted on 2016-07-21 (5 Comments)
re(2): short review.....augmented by Charlie (2016-07-22 07:45:36)
Solution computer solution (spoiler) by Charlie (2016-07-21 10:36:42)
Difficulty: 3 of 5Under Smallest Multiple of 99 (in Just Math)
Posted on 2016-07-19 (3 Comments)
Some Thoughts Seems to be by Charlie (2016-07-19 14:51:57)
Difficulty: 2 of 5Under Two items to get sqrt of 2 (in Science)
Posted on 2016-07-19 (5 Comments)
Solution another way by Charlie (2016-07-19 10:42:59)
Difficulty: 3 of 5Under The First Repeat (in Probability)
Posted on 2016-07-18 (5 Comments)
re: answers by Charlie (2016-07-18 15:13:55)
Solution solution by Charlie (2016-07-18 15:04:40)
Difficulty: 2 of 5Under Denver is not the issue (in Word Problems)
Posted on 2016-07-18 (5 Comments)
Solution re(2): Strong clues from A.A.Euler. (spoiler) by Charlie (2016-07-19 08:01:57)
Hints/Tips Strong clues from A.A.Euler. by Charlie (2016-07-18 11:33:10)
Difficulty: 3 of 5Under Cube Count Calculation (in Shapes)
Posted on 2016-07-13 (1 Comments)
Solution solution by Charlie (2016-07-13 12:55:10)
Difficulty: 3 of 5Under Two Digit Diameter Trial (in Shapes)
Posted on 2016-07-11 (2 Comments)
Solution computer solution (spoiler) by Charlie (2016-07-11 15:31:47)
Difficulty: 3 of 5Under Multiple Harshad Numbers (in Numbers)
Posted on 2016-07-10 (12 Comments)
re(3): Moby Dick has been captured -- part 2 solved by Charlie (2016-07-14 15:10:48)
re(2): Moby Dick has been captured -- part 2 solved by Charlie (2016-07-14 15:04:28)
re: phase 24 output continued by Charlie (2016-07-14 11:19:39)
phase 24 output by Charlie (2016-07-14 11:18:15)
Some Thoughts Moby Dick has been captured -- part 2 solved by Charlie (2016-07-14 11:08:43)
re: The method for part 2 by Charlie (2016-07-10 21:13:38)
re(2): part one by Charlie (2016-07-10 15:00:45)
Some Thoughts The method for part 2 by Charlie (2016-07-10 14:27:26)
re: part one by Charlie (2016-07-10 13:06:36)
Some Thoughts part one by Charlie (2016-07-10 12:43:17)
Difficulty: 4 of 5Under Amicable pair generator (in Numbers)
Posted on 2016-07-08 (1 Comments)
Some Thoughts Computer exploration by Charlie (2016-07-08 15:33:47)
Difficulty: 3 of 5Under Disk Toss on a Grid (in Probability)
Posted on 2016-07-08 (4 Comments)
re: Three answers (spoiler) by Charlie (2016-07-08 20:46:20)
Solution solution by Charlie (2016-07-08 11:17:15)
Difficulty: 4 of 5Under Two out of seven (in Numbers)
Posted on 2016-07-07 (2 Comments)
Solution computer solution (spoiler) by Charlie (2016-07-07 15:29:29)
Difficulty: 3 of 5Under Not too high, not too low (in Just Math)
Posted on 2016-07-06 (3 Comments)
Solution my solution by Charlie (2016-07-06 14:52:48)
Difficulty: 3 of 5Under Find Counterexamples (in Numbers)
Posted on 2016-07-06 (1 Comments)
Some Thoughts computer solution to part 1 by Charlie (2016-07-06 10:12:59)
Difficulty: 3 of 5Under Sequence starting with 30 (in Numbers)
Posted on 2016-07-05 (3 Comments)
Some Thoughts program; research; program by Charlie (2016-07-05 14:43:03)
Difficulty: 3 of 5Under Quadrilateral Area Query 2 (in Shapes)
Posted on 2016-07-03 (3 Comments)
Solution another approach by Charlie (2016-07-03 09:40:53)
Difficulty: 3 of 5Under Pentagonal triple triangles (in Geometry)
Posted on 2016-07-01 (4 Comments)
re: computer method (the part that wouldn't fit) by Charlie (2016-07-01 10:14:21)
Some Thoughts computer method by Charlie (2016-07-01 10:13:19)
Difficulty: 3 of 5Under 4 numbers make 5 squares (in Numbers)
Posted on 2016-06-30 (10 Comments)
Solution re(2): Row of text ok? -- solutions found by Charlie (2016-07-01 14:09:05)
re: Row of text ok? by Charlie (2016-07-01 13:55:57)
re(2): A (bad?) guess by Charlie (2016-07-01 11:02:44)
re: A (bad?) guess by Charlie (2016-07-01 10:55:04)
re(2): computer solution and discussion by Charlie (2016-06-30 22:36:30)
Solution computer solution and discussion by Charlie (2016-06-30 11:20:00)
Difficulty: 3 of 5Under Square Temperatures (in Just Math)
Posted on 2016-06-29 (2 Comments)
Solution Assuming... by Charlie (2016-06-29 16:27:56)
Difficulty: 1 of 5Under Simple number trick (in Numbers)
Posted on 2016-06-29 (5 Comments)
Some Thoughts comment by Charlie (2016-06-29 10:13:15)
Difficulty: 3 of 5Under Pandigital pattern (in Numbers)
Posted on 2016-06-28 (2 Comments)
Some Thoughts Computer exploration by Charlie (2016-06-28 10:16:49)
Difficulty: 3 of 5Under Skip to 4th power (in Numbers)
Posted on 2016-06-27 (4 Comments)
Some Thoughts convincing but not a proof by Charlie (2016-06-27 19:57:01)
Difficulty: 3 of 5Under Square Sum in Pairs (in Just Math)
Posted on 2016-06-27 (2 Comments)
Solution computer solution by Charlie (2016-06-27 13:57:18)
Difficulty: 3 of 5Under Sum Number and Reversal (in Just Math)
Posted on 2016-06-24 (5 Comments)
Solution computer assisted by Charlie (2016-06-24 14:03:57)
Difficulty: 3 of 5Under Find From Four 2 (in Just Math)
Posted on 2016-06-23 (4 Comments)
Solution computer solution by Charlie (2016-06-23 17:02:39)
Difficulty: 2 of 5Under Capital City Conclusion 2 (in Word Problems)
Posted on 2016-06-23 (4 Comments)
Excluded because of non-sovereignty by Charlie (2016-06-23 10:21:18)
Difficulty: 3 of 5Under 2016 and Perfect Square Puzzle (in Just Math)
Posted on 2016-06-22 (4 Comments)
Solution computer solution by Charlie (2016-06-22 16:15:15)
Difficulty: 3 of 5Under Celsius- A Fahrenheit Multiple? (in Just Math)
Posted on 2016-06-21 (7 Comments)
re: And another.. by Charlie (2016-06-22 12:42:25)
Solution five solutions by Charlie (2016-06-22 08:16:39)
re: No Subject - looks like I solved the problem wrong way around by Charlie (2016-06-22 07:54:31)
No Subject by Charlie (2016-06-21 15:23:03)
Difficulty: 3 of 5Under Three vowels (in Word Problems)
Posted on 2016-06-21 (4 Comments)
A lot of computer work... by Charlie (2016-06-21 10:32:32)
Difficulty: 3 of 5Under Find the killer (in Liars and Knights)
Posted on 2016-06-20 (5 Comments)
Solution solution by Charlie (2016-06-20 18:46:16)
Difficulty: 2 of 5Under Circle cuts (in Shapes)
Posted on 2016-06-20 (1 Comments)
Solution Squaring the circle... by Charlie (2016-06-20 10:47:16)
Difficulty: 3 of 5Under Hexadecimal Hinder (in Probability)
Posted on 2016-06-19 (6 Comments)
Solution re: part (i) solution --- correction by Charlie (2016-06-20 21:56:20)
Solution part (iv) solution by Charlie (2016-06-20 10:37:02)
Solution part (iii) solution by Charlie (2016-06-20 09:01:51)
Some Thoughts Simulations for all parts by Charlie (2016-06-19 21:25:11)
Solution part (ii) solution by Charlie (2016-06-19 18:44:57)
Some Thoughts part (i) solution by Charlie (2016-06-19 15:07:44)
Difficulty: 3 of 5Under Roman Numeral and Letter Insertion (in Word Problems)
Posted on 2016-06-17 (2 Comments)
Some Thoughts computer findings by Charlie (2016-06-17 14:27:27)
Difficulty: 3 of 5Under Digit Finding with Hexadecimal Fibonacci (in Just Math)
Posted on 2016-06-16 (1 Comments)
Solution computer solution by Charlie (2016-06-16 15:09:16)
Difficulty: 3 of 5Under A transpogram (in Word Problems)
Posted on 2016-06-16 (1 Comments)
Solution solution by Charlie (2016-06-16 09:53:34)
Difficulty: 4 of 5Under Progressive probability (in Probability)
Posted on 2016-06-15 (1 Comments)
Some Thoughts computer exploration - solution for first part only by Charlie (2016-06-15 15:57:28)
Difficulty: 2 of 5Under Comparing two events (in Probability)
Posted on 2016-06-15 (3 Comments)
re: solution by Charlie (2016-06-16 09:47:20)
Solution spoiler -- try it yourself first by Charlie (2016-06-16 09:43:00)
Difficulty: 3 of 5Under Objective: Integer! (in Geometry)
Posted on 2016-06-14 (4 Comments)
re: Interesting by Charlie (2016-06-15 07:44:09)
Solution computer solution by Charlie (2016-06-14 15:43:05)
Difficulty: 3 of 5Under Arithmetic Product Puzzle 2 (in Sequences)
Posted on 2016-06-14 (2 Comments)
Solution computer solution by Charlie (2016-06-14 09:55:53)
Difficulty: 3 of 5Under Hundred Product Hinder (in Just Math)
Posted on 2016-06-13 (2 Comments)
Solution computer solution (seems unique) by Charlie (2016-06-13 15:15:33)
Difficulty: 4 of 5Under Squared halves (in Numbers)
Posted on 2016-06-10 (1 Comments)
Solution computer solution (spoiler) by Charlie (2016-06-10 15:02:02)
Difficulty: 3 of 5Under Term Finding with Floor (in Sequences)
Posted on 2016-06-09 (3 Comments)
Solution computer solution (spoiler) by Charlie (2016-06-09 10:31:50)
Difficulty: 3 of 5Under Matching pegs (in Probability)
Posted on 2016-06-08 (2 Comments)
step-by-step diffusion and coalescence of the probabilities by Charlie (2016-06-08 13:27:03)
Solution computer assisted solution by Charlie (2016-06-08 13:19:16)
Difficulty: 3 of 5Under Twice 2 products (in Numbers)
Posted on 2016-06-07 (2 Comments)
Solution re: Exhausted Spoiler -- doubling the answers by Charlie (2016-06-07 13:35:34)
Difficulty: 3 of 5Under One of these things is not like the others.. (in Word Problems)
Posted on 2016-06-07 (5 Comments)
re: No Subject by Charlie (2016-06-07 13:37:41)
Difficulty: 3 of 5Under Random Sum Resolution (in Probability)
Posted on 2016-06-06 (1 Comments)
Solution solution by Charlie (2016-06-06 10:51:52)
Difficulty: 3 of 5Under Three expressions - same value (in Just Math)
Posted on 2016-06-02 (3 Comments)
Solution computer assisted solution by Charlie (2016-06-02 15:25:05)
Difficulty: 2 of 5Under No fours on my odometer (in Just Math)
Posted on 2016-06-02 (2 Comments)
re: Possible solution. by Charlie (2016-06-02 09:09:32)
Difficulty: 3 of 5Under King on the run (in Just Math)
Posted on 2016-06-01 (5 Comments)
Solution computer assisted solution by Charlie (2016-06-01 15:37:46)
Difficulty: 3 of 5Under Edge problem (in Geometry)
Posted on 2016-05-31 (3 Comments)
Solution solution after a false assumption by Charlie (2016-05-31 16:07:57)
Difficulty: 2 of 5Under Latin verse (in Word Problems)
Posted on 2016-05-31 (5 Comments)
Solution re: Very ancient latin by Charlie (2016-05-31 16:12:36)
Difficulty: 4 of 5Under List the expressionist numbers (in Numbers)
Posted on 2016-05-30 (10 Comments)
Solution Part 1 down to 67 entries after eliminating the spurious by Charlie (2016-06-02 07:31:32)
Solution Part 1 redone allowing unary negation by Charlie (2016-06-01 08:04:18)
Supplement to part 1 list by Charlie (2016-05-31 08:40:44)
re: Computer solutions by Charlie (2016-05-31 07:39:57)
Solution Part 2 and Bonus by Charlie (2016-05-31 07:31:18)
Solution Computer "solution" part 1 -- no guarantee of completeness by Charlie (2016-05-31 07:27:45)
Difficulty: 4 of 5Under Finding the fixes (in Numbers)
Posted on 2016-05-29 (4 Comments)
re: computer solution and discussion by Charlie (2016-05-29 11:37:40)
re: Stop me before I replace again! by Charlie (2016-05-29 11:27:58)
Solution computer solution and discussion by Charlie (2016-05-29 11:22:38)
Difficulty: 4 of 5Under Power of 2 (in Numbers)
Posted on 2016-05-27 (6 Comments)
Solution computer solution by Charlie (2016-05-27 15:12:52)
Difficulty: 3 of 5Under Mark's itinerary (in Probability)
Posted on 2016-05-26 (5 Comments)
re: An by Charlie (2016-05-29 14:06:54)
Solution Analytic + Simulation + Probabilistic by Charlie (2016-05-26 14:22:24)
Difficulty: 3 of 5Under 2016 and Simultaneous Settlement (in Just Math)
Posted on 2016-05-26 (2 Comments)
Solution computer solution (spoiler) by Charlie (2016-05-26 10:55:52)
Difficulty: 3 of 5Under Duodecimal Element Sum Settlement (in Just Math)
Posted on 2016-05-25 (3 Comments)
Solution working in decimal, same answer by Charlie (2016-05-25 14:22:58)
Difficulty: 3 of 5Under Colored Candy Choice (in Probability)
Posted on 2016-05-25 (10 Comments)
re(3): Second part by Charlie (2016-05-26 15:13:50)
re: Second part by Charlie (2016-05-25 21:05:17)
re(2): No Subject @ Charlie by Charlie (2016-05-25 20:24:18)
Solution No Subject by Charlie (2016-05-25 11:37:33)
Difficulty: 3 of 5Under Wanted: gifted numbers (in Numbers)
Posted on 2016-05-24 (1 Comments)
Solution computer assisted solution by Charlie (2016-05-24 16:06:42)
Difficulty: 3 of 5Under Projection Ponder (in Shapes)
Posted on 2016-05-23 (2 Comments)
Solution solution (if I got the algebra right) by Charlie (2016-05-23 15:29:15)
Difficulty: 4 of 5Under Gambler's policy (in Probability)
Posted on 2016-05-20 (2 Comments)
Solution computer assisted solution by Charlie (2016-05-20 17:48:05)
Difficulty: 3 of 5Under Four Digit Combination Conclusion (in Sequences)
Posted on 2016-05-18 (1 Comments)
Solution solution by Charlie (2016-05-18 19:43:55)
Difficulty: 2 of 5Under Grid exercise (in Just Math)
Posted on 2016-05-18 (2 Comments)
Solution 2-step method by Charlie (2016-05-18 19:49:08)
Difficulty: 2 of 5Under A square problem (in Just Math)
Posted on 2016-05-17 (1 Comments)
Solution solution by Charlie (2016-05-17 12:45:44)
Difficulty: 3 of 5Under AABBCCDD and Perfect Square (in Just Math)
Posted on 2016-05-16 (3 Comments)
Solution computer solutions by Charlie (2016-05-16 16:23:10)
Difficulty: 3 of 5Under Two distinct questions (in Just Math)
Posted on 2016-05-13 (1 Comments)
Solution solution by Charlie (2016-05-13 14:46:05)
Difficulty: 4 of 5Under From challenge to change (in Word Problems)
Posted on 2016-05-12 (4 Comments)
Some Thoughts 70% of them by Charlie (2016-05-12 14:19:12)
Difficulty: 3 of 5Under Divisible by 198 (in Just Math)
Posted on 2016-05-12 (2 Comments)
Solution computer solution by Charlie (2016-05-12 10:05:07)
Difficulty: 3 of 5Under Icosahedron addressed (in Geometry)
Posted on 2016-05-11 (2 Comments)
Some Thoughts The area and a start toward the volume by Charlie (2016-05-11 14:41:18)
Difficulty: 3 of 5Under Sum ArcTan Limit (in Calculus)
Posted on 2016-05-11 (6 Comments)
re(3): summing the series via computer by Charlie (2016-05-11 14:55:30)
re(2): summing the series via computer by Charlie (2016-05-11 14:45:20)
Solution summing the series via computer by Charlie (2016-05-11 10:19:23)
Difficulty: 3 of 5Under Tanya's puzzle (in Logic)
Posted on 2016-05-10 (10 Comments)
Some Thoughts re(4): could be by Charlie (2016-05-11 07:32:24)
Some Thoughts could be by Charlie (2016-05-10 14:00:22)
Difficulty: 3 of 5Under Make it true (in Numbers)
Posted on 2016-05-09 (5 Comments)
Solution via computer by Charlie (2016-05-09 15:45:58)
Solution Quick solution by Charlie (2016-05-09 13:44:23)
Difficulty: 2 of 5Under Puzzle Calendar (in General)
Posted on 2016-05-09 (5 Comments)
re(2): Solution -- solution is posted by Charlie (2016-05-10 08:29:46)
Difficulty: 3 of 5Under First Term Finding (in Sequences)
Posted on 2016-05-04 (2 Comments)
Solution computer solution by Charlie (2016-05-04 13:13:53)
Difficulty: 3 of 5Under LCM and GCD Equation (in Just Math)
Posted on 2016-05-03 (2 Comments)
Solution computer solution by Charlie (2016-05-03 19:05:37)
Difficulty: 3 of 5Under Base Baffle (in Just Math)
Posted on 2016-05-02 (2 Comments)
Solution solution by Charlie (2016-05-02 14:35:06)
Difficulty: 3 of 5Under Quadratic and Perfect Square Query (in Just Math)
Posted on 2016-04-30 (2 Comments)
Solution computer exploration -- probable spoiler by Charlie (2016-04-30 09:05:23)
Difficulty: 3 of 5Under LCM and GCD Sequence (in Sequences)
Posted on 2016-04-29 (1 Comments)
Some Thoughts probable solution (spoiler) by Charlie (2016-04-29 11:30:46)
Difficulty: 2 of 5Under One and only (in Numbers)
Posted on 2016-04-28 (4 Comments)
re: spoiler by Charlie (2016-04-28 10:39:05)
Solution computer assisted solution by Charlie (2016-04-28 10:34:13)
Difficulty: 3 of 5Under M.G.'s wit (in Just Math)
Posted on 2016-04-27 (3 Comments)
Solution Dimensional Analysis by Charlie (2016-04-27 14:29:43)
Difficulty: 2 of 5Under Think it over (in Logic)
Posted on 2016-04-27 (6 Comments)
Some Thoughts Solution to the distractor by Charlie (2016-04-27 10:35:42)
Difficulty: 3 of 5Under No Carry Nuance (in Just Math)
Posted on 2016-04-26 (3 Comments)
Solution Part 1 by Charlie (2016-04-26 13:56:38)
Difficulty: 3 of 5Under 2 diagonal sums (in Just Math)
Posted on 2016-04-26 (1 Comments)
Solution solution by Charlie (2016-04-26 10:09:11)
Difficulty: 2 of 5Under Draw a Line to Partition the Grid (in General)
Posted on 2016-04-25 (7 Comments)
re(3): Strange by Charlie (2016-04-29 12:52:15)
re: Strange by Charlie (2016-04-29 07:55:06)
re: Solution? by Charlie (2016-04-26 11:42:47)
Difficulty: 3 of 5Under Cubic Diophantine Conclusion (in Just Math)
Posted on 2016-04-22 (9 Comments)
Some Thoughts computer exploration by Charlie (2016-04-22 11:11:58)
Difficulty: 3 of 5Under Eight Digit Product Poser (in Just Math)
Posted on 2016-04-20 (1 Comments)
Solution with a little help from a Mintoris Basic program (Android) by Charlie (2016-04-20 13:46:12)
Difficulty: 3 of 5Under Could you please repeat that? (in Probability)
Posted on 2016-04-20 (4 Comments)
re(2): Laying out the possibilities by Charlie (2016-04-20 14:53:16)
Solution Laying out the possibilities by Charlie (2016-04-20 10:36:25)
Difficulty: 3 of 5Under Asteroid walk (in General)
Posted on 2016-04-19 (8 Comments)
Question question by Charlie (2016-04-19 22:46:24)
Difficulty: 3 of 5Under No Equal Weighings (in Weights and Scales)
Posted on 2016-04-18 (4 Comments)
re: computer solution -- sampling of every 1000th valid sequence by Charlie (2016-04-18 15:10:27)
Solution computer solution by Charlie (2016-04-18 14:55:28)
Difficulty: 3 of 5Under An educated guess (in Probability)
Posted on 2016-04-18 (7 Comments)
Some Thoughts a new simulation by Charlie (2016-04-18 14:44:30)
Some Thoughts preliminary simulation by Charlie (2016-04-18 09:01:29)
Some Thoughts Preliminary guess by Charlie (2016-04-18 08:44:45)
Difficulty: 3 of 5Under Mean Integer Illation (in Just Math)
Posted on 2016-04-17 (1 Comments)
computer solution by Charlie (2016-04-17 15:30:22)
Difficulty: 3 of 5Under Electrical Cube 3 (in Science)
Posted on 2016-04-15 (1 Comments)
Solution solution by Charlie (2016-04-15 19:29:21)
Difficulty: 3 of 5Under Rectangular Crease Resolution (in Shapes)
Posted on 2016-04-15 (2 Comments)
Solution GSP says (7 significant figures) by Charlie (2016-04-15 09:52:15)
Difficulty: 3 of 5Under Three ways - same sum (in Numbers)
Posted on 2016-04-14 (3 Comments)
Solution computer solution by Charlie (2016-04-14 09:42:14)
Difficulty: 3 of 5Under Complex Ratio and Number Resolution (in Sequences)
Posted on 2016-04-13 (2 Comments)
Solution computer assisted solution by Charlie (2016-04-13 14:37:15)
Difficulty: 3 of 5Under 1 to 9 concatenation (in Numbers)
Posted on 2016-04-12 (7 Comments)
Solution computer solution by Charlie (2016-04-12 14:58:24)
Difficulty: 3 of 5Under 2 equal sums (in Just Math)
Posted on 2016-04-11 (3 Comments)
re: computer exploration -- possible spoiler by Charlie (2016-04-11 22:44:38)
Some Thoughts computer exploration -- possible spoiler by Charlie (2016-04-11 15:49:43)
Difficulty: 2 of 5Under Extreme Palindrome Exercise (in Just Math)
Posted on 2016-04-11 (3 Comments)
Solution agree by Charlie (2016-04-11 10:16:10)
Difficulty: 4 of 5Under A Pythagorean triangle (in Numbers)
Posted on 2016-04-08 (4 Comments)
Solution computer solution by Charlie (2016-04-08 19:21:59)
Difficulty: 3 of 5Under Square Settlement With Digits (in Just Math)
Posted on 2016-04-07 (2 Comments)
Solution computer solution by Charlie (2016-04-07 15:40:15)
Difficulty: 2 of 5Under Tenacious Divisibility Treat (in Just Math)
Posted on 2016-04-06 (9 Comments)
broll's interpretation is correct by Charlie (2016-04-07 10:41:07)
solution by Charlie (2016-04-06 10:14:35)
Difficulty: 2 of 5Under Year Yearn 3 (in Just Math)
Posted on 2016-04-05 (1 Comments)
Solution computer solution by Charlie (2016-04-05 10:22:40)
Difficulty: 3 of 5Under Odd and Even 3 (in Just Math)
Posted on 2016-04-04 (6 Comments)
re(3): My answers (with and without leading zeros) by Charlie (2016-04-05 22:28:01)
re: My answers (with and without leading zeros) by Charlie (2016-04-05 13:33:52)
Solution computer solution by Charlie (2016-04-04 19:14:42)
Difficulty: 2 of 5Under Find this number (in Numbers)
Posted on 2016-04-04 (1 Comments)
Solution computer solution by Charlie (2016-04-04 11:21:07)
Difficulty: 2 of 5Under Look for 3 sevens (in Numbers)
Posted on 2016-04-01 (2 Comments)
Solution computer finds overlooked values by Charlie (2016-04-01 10:48:18)
Difficulty: 3 of 5Under 4 partitions, same product (in Numbers)
Posted on 2016-03-31 (1 Comments)
Solution computer solution and discussion by Charlie (2016-03-31 10:32:29)
Difficulty: 2 of 5Under Fibs and Mods. (in Numbers)
Posted on 2016-03-30 (1 Comments)
Hints/Tips no proof here, just some verification, and a new fact by Charlie (2016-03-30 11:28:53)
Difficulty: 3 of 5Under Quartering a Square (in Shapes)
Posted on 2016-03-29 (4 Comments)
re(2): computer solution by Charlie (2016-03-30 08:18:22)
re: computer solution by Charlie (2016-03-29 16:08:03)
Solution computer solution by Charlie (2016-03-29 15:45:59)
Difficulty: 2 of 5Under Tatami Tiling (in Shapes)
Posted on 2016-03-29 (2 Comments)
Solution solution by Charlie (2016-03-29 10:27:33)
Difficulty: 3 of 5Under Electrical Cube 2 (in Science)
Posted on 2016-03-25 (1 Comments)
Solution solution by Charlie (2016-03-25 10:22:17)
Difficulty: 3 of 5Under Sum from Arithmetic and Geometric (in Sequences)
Posted on 2016-03-24 (5 Comments)
Solution computer solution by Charlie (2016-03-24 15:32:13)
re(2): Possible Solution by Charlie (2016-03-24 15:27:09)
Difficulty: 3 of 5Under Double Reflection (in Geometry)
Posted on 2016-03-24 (2 Comments)
Solution solution by Charlie (2016-03-24 10:23:45)
Difficulty: 3 of 5Under Minimizing n (in Numbers)
Posted on 2016-03-23 (2 Comments)
Solution computer confirmation (solution) by Charlie (2016-03-23 13:34:40)
Difficulty: 2 of 5Under Neighbors or not? (in Probability)
Posted on 2016-03-22 (3 Comments)
Solution solution by Charlie (2016-03-22 13:21:52)
Difficulty: 3 of 5Under Rational Value Validation (in Just Math)
Posted on 2016-03-20 (11 Comments)
Some Thoughts re: solution for 4 elements only by Charlie (2016-03-23 14:52:58)
Some Thoughts solution for 4 elements only by Charlie (2016-03-22 08:12:50)
re(3): cardinality of solution set by Charlie (2016-03-21 17:02:49)
re: cardinality of solution set by Charlie (2016-03-21 10:14:55)
cardinality of solution set by Charlie (2016-03-21 08:00:01)
re(2): Two special results by Charlie (2016-03-20 22:49:12)
Hints/Tips Two special results by Charlie (2016-03-20 10:26:59)
Some Thoughts a sampling of 500 at random by Charlie (2016-03-20 10:14:35)
Difficulty: 3 of 5Under 2 coins (in Probability)
Posted on 2016-03-18 (2 Comments)
Solution Bayes by Charlie (2016-03-18 11:10:23)
Difficulty: 3 of 5Under Never 0 mod 3 (in Probability)
Posted on 2016-03-17 (7 Comments)
re(4): Solution by Charlie (2016-03-17 23:21:55)
re(3): Solution by Charlie (2016-03-17 22:33:33)
re(2): Solution by Charlie (2016-03-17 21:34:14)
re: Solution by Charlie (2016-03-17 14:47:17)
Some Thoughts Values for the first 5 k by Charlie (2016-03-17 14:39:24)
Difficulty: 2 of 5Under Find number and base (in Numbers)
Posted on 2016-03-17 (6 Comments)
Solution solution by Charlie (2016-03-17 10:41:11)
Difficulty: 4 of 5Under Set Me Up Again (in Numbers)
Posted on 2016-03-16 (1 Comments)
Solution computer solution by Charlie (2016-03-16 16:10:34)
Difficulty: 3 of 5Under Minimal cardinality (in Numbers)
Posted on 2016-03-16 (3 Comments)
Solution proposed solution by Charlie (2016-03-16 09:48:15)
Difficulty: 4 of 5Under To-day is Monday & a PIday (in Numbers)
Posted on 2016-03-14 (13 Comments)
re(2): My best @ jer and CH by Charlie (2016-03-15 09:00:50)
Hints/Tips some lower numerator/denominator pairs by Charlie (2016-03-14 14:17:52)
Hints/Tips computer-generated solving aid by Charlie (2016-03-14 09:05:33)
Difficulty: 3 of 5Under Only one below 5000 (in Numbers)
Posted on 2016-03-11 (4 Comments)
Solution computer solution by Charlie (2016-03-11 15:28:34)
Difficulty: 4 of 5Under Ring of triangles II (in Geometry)
Posted on 2016-03-10 (2 Comments)
Solution re: computer solution -- revised by Charlie (2016-03-10 10:09:56)
Solution computer solution by Charlie (2016-03-10 09:43:35)
Difficulty: 3 of 5Under More bouncing (in Geometry)
Posted on 2016-03-09 (3 Comments)
re(2): proposed solution by Charlie (2016-03-10 07:32:51)
Solution proposed solution by Charlie (2016-03-09 14:28:48)
Difficulty: 3 of 5Under 8th Term from Term Product (in Sequences)
Posted on 2016-03-07 (4 Comments)
Solution computer solution by Charlie (2016-03-07 13:43:58)
Difficulty: 1 of 5Under d1 or more ? (in Numbers)
Posted on 2016-03-07 (4 Comments)
Some Thoughts thoughts by Charlie (2016-03-07 09:49:56)
Difficulty: 3 of 5Under Matryoshka Nesting Primes (in Numbers)
Posted on 2016-03-03 (11 Comments)
re(3): computer solution NEEDS FILTERING by Charlie (2016-03-03 20:09:20)
re(2): computer solution NEEDS FILTERING by Charlie (2016-03-03 20:05:25)
re(7): computer solution -- the program by Charlie (2016-03-03 15:29:17)
re(6): computer solution (continued) by Charlie (2016-03-03 15:28:22)
re(5): computer solution (continued) by Charlie (2016-03-03 15:27:27)
re(4): computer solution (continued) by Charlie (2016-03-03 15:26:32)
re(3): computer solution (continued) by Charlie (2016-03-03 15:24:53)
re(2): computer solution (continued) by Charlie (2016-03-03 15:23:04)
re: computer solution (continued) by Charlie (2016-03-03 15:22:06)
Solution computer solution by Charlie (2016-03-03 15:20:13)
Difficulty: 3 of 5Under Cheese Cut Calculation (in Just Math)
Posted on 2016-03-03 (1 Comments)
Solution computer solution by Charlie (2016-03-03 11:31:38)
Difficulty: 3 of 5Under Ring of triangles I (in Geometry)
Posted on 2016-03-02 (2 Comments)
Solution computer solution -- spoiler by Charlie (2016-03-02 15:41:57)
Difficulty: 3 of 5Under Arithmetic Roots (in Just Math)
Posted on 2016-03-02 (2 Comments)
Solution solution with computer assist by Charlie (2016-03-02 10:32:09)
Difficulty: 3 of 5Under Light Beam Reflection (in Shapes)
Posted on 2016-03-01 (1 Comments)
Solution solution by Charlie (2016-03-01 15:22:28)
Difficulty: 2 of 5Under 13 and 2 (in Numbers)
Posted on 2016-03-01 (6 Comments)
Some Thoughts re: answer by Charlie (2016-03-01 09:20:29)
computer still finds no solution by Charlie (2016-03-01 09:17:38)
Difficulty: 3 of 5Under On Track (in Just Math)
Posted on 2016-02-29 (7 Comments)
re: Misread the problem by Charlie (2016-03-01 07:27:05)
re: Circular logic (spoiler) by Charlie (2016-02-29 21:49:52)
Difficulty: 3 of 5Under Miles to Kilometers (in General)
Posted on 2016-02-26 (3 Comments)
re: quick Excel solution by Charlie (2016-02-26 10:07:44)
Solution computer solution by Charlie (2016-02-26 10:03:15)
Difficulty: 3 of 5Under Initial Term Illation (in Sequences)
Posted on 2016-02-25 (2 Comments)
Solution computer solution by Charlie (2016-02-25 16:03:19)
Difficulty: 3 of 5Under A Non-Reintersecting Tangent (in Calculus)
Posted on 2016-02-24 (1 Comments)
Solution solution by Charlie (2016-02-24 15:09:22)
Difficulty: 3 of 5Under My four numbers (in Just Math)
Posted on 2016-02-24 (12 Comments)
re(2): solution -- spoiler by Charlie (2016-02-25 07:56:24)
Solution solution -- spoiler by Charlie (2016-02-24 12:18:06)
Difficulty: 3 of 5Under In a bar (in Probability)
Posted on 2016-02-23 (6 Comments)
re: Last Call by Charlie (2016-02-24 10:22:27)
Solution solution, with caveat by Charlie (2016-02-23 14:03:10)
Difficulty: 3 of 5Under Cheese Cut Conclusion (in Shapes)
Posted on 2016-02-23 (2 Comments)
Solution it would seem... (spoiler) by Charlie (2016-02-23 11:20:35)
Difficulty: 3 of 5Under Geometric and Three Power Travail (in Sequences)
Posted on 2016-02-22 (2 Comments)
Solution computer assisted solution by Charlie (2016-02-22 12:17:23)
Difficulty: 2 of 5Under Counting Ten Segment Paths (in General)
Posted on 2016-02-19 (6 Comments)
Solution The basic set (rotations and reflections eliminated) by Charlie (2016-02-19 20:48:00)
Solution Missed a few before--now added; As well as I can classify them by Charlie (2016-02-19 14:59:11)
Solution re(2): As many as I found by Charlie (2016-02-19 14:37:35)
Solution re: As many as I found by Charlie (2016-02-19 14:09:29)
Solution computer solution by Charlie (2016-02-19 13:29:41)
Difficulty: 2 of 5Under 25 * 1 (in Just Math)
Posted on 2016-02-18 (3 Comments)
Solution re(2): solution - what about these? -- back to the computer by Charlie (2016-02-18 13:50:04)
Solution solution by Charlie (2016-02-18 10:55:02)
Difficulty: 4 of 5Under Equal products and sums (in Just Math)
Posted on 2016-02-17 (4 Comments)
re: computer solution -- a specific subset and the program by Charlie (2016-02-17 20:19:11)
Solution computer solution by Charlie (2016-02-17 20:16:44)
Difficulty: 3 of 5Under 1-2-3 Remainder Resolution (in Logic)
Posted on 2016-02-16 (12 Comments)
Solution computer solution by Charlie (2016-02-16 11:59:08)
Difficulty: 3 of 5Under Big difference (in Numbers)
Posted on 2016-02-14 (4 Comments)
re(3): computer solutions by Charlie (2016-02-14 20:05:51)
Solution computer solutions by Charlie (2016-02-14 15:03:30)
Difficulty: 4 of 5Under Optimal Order (in Sequences)
Posted on 2016-02-10 (5 Comments)
re: This should work by Charlie (2016-02-14 11:33:18)
Difficulty: 2 of 5Under How high the moon tonight (in Numbers)
Posted on 2016-02-10 (1 Comments)
Solution computer solution by Charlie (2016-02-10 12:36:36)
Difficulty: 3 of 5Under Consecutive Numbers and Subset Choice (in Just Math)
Posted on 2016-02-09 (6 Comments)
found the error in method 2 by Charlie (2016-02-09 16:29:47)
Solution on the other hand by Charlie (2016-02-09 16:15:26)
Some Thoughts 2 computer solutions; the second is probably right by Charlie (2016-02-09 16:06:19)
Difficulty: 4 of 5Under Pumpkins 7 (in Just Math)
Posted on 2016-02-05 (2 Comments)
Solution computer solution by Charlie (2016-02-05 15:41:05)
Difficulty: 3 of 5Under Evaluate further probabilities (in Probability)
Posted on 2016-02-03 (1 Comments)
Solution computer-aided solution by Charlie (2016-02-03 11:18:01)
Difficulty: 3 of 5Under Dascal triangle (in Numbers)
Posted on 2016-02-02 (8 Comments)
re(6): computer solution by Charlie (2016-02-04 11:25:27)
re(5): computer solution by Charlie (2016-02-04 10:46:56)
re(3): computer solution by Charlie (2016-02-03 22:16:06)
re(2): computer solution by Charlie (2016-02-03 22:02:24)
Solution computer solution by Charlie (2016-02-02 15:37:44)
Difficulty: 3 of 5Under Find From First and Last (in Just Math)
Posted on 2016-02-02 (1 Comments)
Solution computer solution by Charlie (2016-02-02 11:27:00)
Difficulty: 3 of 5Under Mille and Remainder Resolution (in Sequences)
Posted on 2016-02-01 (3 Comments)
Solution spoiler solution; can it clue toward the intended method? by Charlie (2016-02-02 07:56:22)
Difficulty: 3 of 5Under N Nine Nuance (in Just Math)
Posted on 2016-01-29 (6 Comments)
re: possible solution by Charlie (2016-01-29 11:11:04)
Solution computer solution by Charlie (2016-01-29 10:47:03)
Difficulty: 3 of 5Under Erase the right 90 (in Numbers)
Posted on 2016-01-28 (5 Comments)
re: Sequence? by Charlie (2016-01-29 11:33:30)
Solution proof on the internet (spoiler) by Charlie (2016-01-28 15:16:54)
Difficulty: 3 of 5Under Last term zero (in Sequences)
Posted on 2016-01-28 (3 Comments)
re: Spoiler by Charlie (2016-01-28 10:22:55)
Difficulty: 4 of 5Under 5 cubes (in Numbers)
Posted on 2016-01-26 (1 Comments)
Solution computer solution by Charlie (2016-01-26 15:29:18)
Difficulty: 2 of 5Under Evaluate probabilities (in Probability)
Posted on 2016-01-26 (3 Comments)
Solution simple understanding, and randomization procedures by Charlie (2016-01-26 11:37:16)
Difficulty: 3 of 5Under Floor Function Query (in Just Math)
Posted on 2016-01-25 (1 Comments)
Solution computer solution by Charlie (2016-01-25 11:16:57)
Difficulty: 4 of 5Under Pumpkins 6 (in Numbers)
Posted on 2016-01-22 (11 Comments)
re(3): Analytical solution (Bonus puzzle question) by Charlie (2016-01-27 12:13:38)
Solution computer solution by Charlie (2016-01-22 15:26:29)
Difficulty: 3 of 5Under Hypotenuse from Cone (in Shapes)
Posted on 2016-01-22 (2 Comments)
Solution same solution numerically by Charlie (2016-01-22 10:42:20)
Difficulty: 3 of 5Under Binary Palindrome and Near Magic Square (in Just Math)
Posted on 2016-01-21 (1 Comments)
Solution computer solution by Charlie (2016-01-21 15:48:43)
Difficulty: 3 of 5Under Find the next two numbers (in Sequences)
Posted on 2016-01-21 (4 Comments)
re: As Jer by Charlie (2016-01-22 10:46:37)
Difficulty: 4 of 5Under Detect my chosen coin (in Games)
Posted on 2016-01-19 (19 Comments)
re(3): Suggested wording for solution. by Charlie (2016-02-04 11:09:09)
Suggested wording for solution. by Charlie (2016-02-03 22:53:36)
re: The egg of Colubus by Charlie (2016-01-26 13:24:59)
Difficulty: 3 of 5Under 9 coins prob (in Weights and Scales)
Posted on 2016-01-18 (6 Comments)
re: Two preplanned weighings by Charlie (2016-01-19 07:56:20)
Solution Outline of a sample solution by Charlie (2016-01-18 15:50:43)
Difficulty: 3 of 5Under 6 coins (in Weights and Scales)
Posted on 2016-01-13 (10 Comments)
Solution re(2): short solution - spoiler by Charlie (2016-01-14 19:59:00)
re: short solution - spoiler by Charlie (2016-01-13 19:29:50)
Solution computer solution by Charlie (2016-01-13 14:32:07)
Some Thoughts computer attempt by Charlie (2016-01-13 13:42:02)
re: Solution by Charlie (2016-01-13 12:40:10)
Difficulty: 2 of 5Under Expose ambiguity (in Logic)
Posted on 2016-01-13 (5 Comments)
Solution one possible set by Charlie (2016-01-13 09:11:38)
Difficulty: 3 of 5Under Sine in a Circle (in Shapes)
Posted on 2016-01-11 (1 Comments)
Solution solution by Charlie (2016-01-11 15:13:50)
Difficulty: 4 of 5Under Primevens and primeodds (in Numbers)
Posted on 2016-01-10 (8 Comments)
Solution re(4): some stats extended by Charlie (2016-01-11 22:06:41)
re(3): some stats extended by Charlie (2016-01-11 07:39:15)
re: some stats extended by Charlie (2016-01-10 17:56:21)
Some Thoughts some stats by Charlie (2016-01-10 14:12:52)
Difficulty: 4 of 5Under Lost in the woods (in Just Math)
Posted on 2016-01-08 (12 Comments)
Solution proposed solution by Charlie (2016-01-08 15:43:08)
Difficulty: 3 of 5Under Pumpkins 5 (in Weights and Scales)
Posted on 2016-01-06 (2 Comments)
Solution computer solution by Charlie (2016-01-06 11:25:21)
Difficulty: 3 of 5Under Test #9 (in Word Problems)
Posted on 2016-01-05 (3 Comments)
Some Thoughts from my word list by Charlie (2016-01-05 11:30:24)
Difficulty: 3 of 5Under Twenty deposits (in Just Math)
Posted on 2016-01-04 (4 Comments)
Solution solution by Charlie (2016-01-04 15:33:04)
Difficulty: 2 of 5Under One out of Five (in Weights and Scales)
Posted on 2016-01-04 (2 Comments)
Solution My solution is way too convoluted by Charlie (2016-01-04 10:54:12)
Difficulty: 3 of 5Under Arithmetic Triplet Ascertainment (in Just Math)
Posted on 2016-01-03 (1 Comments)
Solution Heuristic solution by Charlie (2016-01-03 10:57:44)
Difficulty: 4 of 5Under Peaceful superqueens (in General)
Posted on 2015-12-31 (2 Comments)
Solution computer solutions by Charlie (2015-12-31 15:16:31)
Difficulty: 3 of 5Under Infinite Illation Decision (in Just Math)
Posted on 2015-12-31 (3 Comments)
Some Thoughts It seems... by Charlie (2015-12-31 10:18:36)
Difficulty: 3 of 5Under Monotonous integers (in Numbers)
Posted on 2015-12-30 (9 Comments)
Solution solution, starting out with analytic by Charlie (2015-12-30 13:51:37)
Difficulty: 3 of 5Under A five letter word (in Word Problems)
Posted on 2015-12-28 (6 Comments)
Solution computer solution by Charlie (2015-12-28 21:04:38)
Difficulty: 3 of 5Under From pie to numbers (in Numbers)
Posted on 2015-12-27 (14 Comments)
re: solutions for most numbers by Charlie (2015-12-28 08:07:34)
re: one more by Charlie (2015-12-27 15:57:44)
Solution computer solution by Charlie (2015-12-27 13:40:30)
Difficulty: 3 of 5Under Binary Palindrome Square Magic (in Just Math)
Posted on 2015-12-24 (11 Comments)
re: Magic Squares by Charlie (2015-12-26 07:50:24)
re: No Subject by Charlie (2015-12-25 08:11:02)
Difficulty: 3 of 5Under Ten cities (in Cryptography)
Posted on 2015-12-24 (1 Comments)
Solution computer solution by Charlie (2015-12-24 10:48:08)
Difficulty: 3 of 5Under Power and Digit Poser (in Just Math)
Posted on 2015-12-23 (2 Comments)
Solution solution by Charlie (2015-12-23 11:01:08)
Difficulty: 3 of 5Under Pentagon and Reflection Poser (in Shapes)
Posted on 2015-12-22 (1 Comments)
Solution Graphing calculator solution by Charlie (2015-12-22 15:10:33)
Difficulty: 2 of 5Under 5-2=1 (in Word Problems)
Posted on 2015-12-21 (5 Comments)
Solution computer solution by Charlie (2015-12-21 10:29:33)
Difficulty: 2 of 5Under 80 (in Numbers)
Posted on 2015-12-19 (3 Comments)
Some Thoughts computer solutions for all but 2359 by Charlie (2015-12-19 13:15:36)
Difficulty: 3 of 5Under Some sequences! (in Sequences)
Posted on 2015-12-18 (1 Comments)
Solution computer solution by Charlie (2015-12-18 11:00:18)
Difficulty: 3 of 5Under Distinct Triangle Determination (in Shapes)
Posted on 2015-12-16 (3 Comments)
re(2): computer solution (Spoiler) by Charlie (2015-12-17 11:38:36)
Solution computer solution by Charlie (2015-12-16 15:13:21)
Difficulty: 3 of 5Under Protecting the fleet Parts C. & D. (in Geometry)
Posted on 2015-12-15 (2 Comments)
Solution solution by Charlie (2015-12-15 18:58:34)
Difficulty: 3 of 5Under A peculiar pandigital (in Numbers)
Posted on 2015-12-14 (2 Comments)
Solution All of them by Charlie (2015-12-14 19:06:38)
Difficulty: 2 of 5Under Protecting the fleet Parts A. & B. (in Geometry)
Posted on 2015-12-14 (4 Comments)
re(2): solutions by Charlie (2015-12-15 10:57:18)
Solution solutions by Charlie (2015-12-14 15:04:04)
Difficulty: 3 of 5Under Four Digit and Two Digit Treat (in Just Math)
Posted on 2015-12-13 (1 Comments)
Solution computer solution by Charlie (2015-12-13 18:21:48)
Difficulty: 2 of 5Under Using a standard deck (in Numbers)
Posted on 2015-12-11 (2 Comments)
re: Solution by Charlie (2015-12-12 08:09:11)
Difficulty: 3 of 5Under A peculiar triangular number (in Numbers)
Posted on 2015-12-10 (2 Comments)
Solution computer solution (spoiler) by Charlie (2015-12-10 18:00:00)
Difficulty: 2 of 5Under Triple Letter Occurrence, Twice! (in Word Problems)
Posted on 2015-12-10 (3 Comments)
Solution computer solution 6-, 7- and 8-letter words by Charlie (2015-12-10 09:13:26)
Difficulty: 3 of 5Under Two Light Coins (in Weights and Scales)
Posted on 2015-12-09 (1 Comments)
Solution solution by Charlie (2015-12-09 19:44:31)
Difficulty: 3 of 5Under Hold your horses (in General)
Posted on 2015-12-09 (3 Comments)
Solution solution by Charlie (2015-12-09 13:07:08)
Difficulty: 3 of 5Under A special short-list (in Numbers)
Posted on 2015-12-08 (3 Comments)
Solution solution with computer-generated list by Charlie (2015-12-08 10:45:22)
Difficulty: 3 of 5Under Fibonaccish ratio (in Sequences)
Posted on 2015-12-07 (3 Comments)
re(2): solution by Charlie (2015-12-07 19:54:13)
Solution solution by Charlie (2015-12-07 18:01:58)
Difficulty: 3 of 5Under Cos Case Concern (in Shapes)
Posted on 2015-12-06 (4 Comments)
re: Two solutions by Charlie (2015-12-06 15:08:11)
Difficulty: 2 of 5Under List of pairs (in Just Math)
Posted on 2015-12-04 (2 Comments)
Solution computer solution -- first eight pairs by Charlie (2015-12-04 11:27:37)
Difficulty: 3 of 5Under A Math Problem (in Just Math)
Posted on 2015-12-03 (6 Comments)
Solution computer solution of a way that works by Charlie (2015-12-03 15:28:25)
Difficulty: 3 of 5Under Get the right product (in Just Math)
Posted on 2015-12-01 (5 Comments)
Some Thoughts Possible for 9 by Charlie (2015-12-02 11:11:35)
computer verification it doesn't work for n=9 by Charlie (2015-12-02 10:52:59)
Difficulty: 2 of 5Under Daylight Saving (in Cryptography)
Posted on 2015-12-01 (4 Comments)
Solution re: Wrong Answer (spoiler) by Charlie (2015-12-01 11:20:44)
Difficulty: 3 of 5Under Increasing sequences (in Just Math)
Posted on 2015-11-30 (3 Comments)
Solution computer solution by Charlie (2015-11-30 14:48:11)
Difficulty: 3 of 5Under Table's peculiarity (in Just Math)
Posted on 2015-11-29 (6 Comments)
re(3): Example needed by Charlie (2015-11-30 19:09:30)
re: Example needed by Charlie (2015-11-30 08:24:58)
Difficulty: 3 of 5Under 1-2-3 Square Settlement (in Just Math)
Posted on 2015-11-27 (3 Comments)
re(2): computer solution -- smallest nine values by Charlie (2015-11-28 08:58:06)
Solution computer solution -- smallest nine values by Charlie (2015-11-27 15:30:18)
Difficulty: 3 of 5Under Root factorial (in Numbers)
Posted on 2015-11-25 (1 Comments)
Some Thoughts thoughts by Charlie (2015-11-25 15:01:26)
Difficulty: 3 of 5Under Square in a notched square (in Geometry)
Posted on 2015-11-25 (3 Comments)
Solution A method of calculation--needs simplification. by Charlie (2015-11-25 10:22:26)
Difficulty: 3 of 5Under Biggest and smallest (in Just Math)
Posted on 2015-11-24 (2 Comments)
Solution computer solution by Charlie (2015-11-24 10:34:15)
Difficulty: 3 of 5Under Summing Consecutive Terms and Pair Determination (in Sequences)
Posted on 2015-11-21 (3 Comments)
Solution computer solution by Charlie (2015-11-21 13:11:45)
Difficulty: 3 of 5Under Generalizing II (in Sequences)
Posted on 2015-11-20 (2 Comments)
Solution a way to calculate by Charlie (2015-11-20 14:45:19)
Difficulty: 3 of 5Under Counting correctly (in Numbers)
Posted on 2015-11-19 (3 Comments)
re(2): analytic solution, subject to error by Charlie (2015-11-19 13:31:43)
Solution analytic solution, subject to error by Charlie (2015-11-19 11:13:05)
Difficulty: 4 of 5Under If you go (in Numbers)
Posted on 2015-11-18 (2 Comments)
Solution computer solution by Charlie (2015-11-18 16:12:10)
Difficulty: 3 of 5Under Upgrading procedure (in Just Math)
Posted on 2015-11-17 (1 Comments)
Solution computer solution by Charlie (2015-11-17 18:57:42)
Difficulty: 2 of 5Under A non-trivial progression (in Numbers)
Posted on 2015-11-17 (7 Comments)
re(2): answers revisited by Charlie (2015-11-18 11:23:18)
Solution d2 answers by Charlie (2015-11-17 10:37:59)
Difficulty: 2 of 5Under Cryptajoke XII (in Cryptography)
Posted on 2015-11-16 (2 Comments)
Solution solution (spoiler) by Charlie (2015-11-16 12:31:12)
Difficulty: 4 of 5Under 9-letter word II (in Sequences)
Posted on 2015-11-13 (1 Comments)
Solution computer aided solution by Charlie (2015-11-13 15:49:41)
Difficulty: 1 of 5Under 6 or less liars (in Liars and Knights)
Posted on 2015-11-13 (16 Comments)
re(3): Summing up - spoiler by Charlie (2015-11-17 10:57:38)
re(4): solution by Charlie (2015-11-15 18:39:50)
Solution solution by Charlie (2015-11-13 10:50:54)
Difficulty: 3 of 5Under 3c+2v (in Word Problems)
Posted on 2015-11-12 (3 Comments)
Solution computer solution by Charlie (2015-11-12 13:23:55)
Difficulty: 2 of 5Under Two sisters (in Famous Riddles)
Posted on 2015-11-12 (2 Comments)
Solution re: Possible solution by Charlie (2015-11-12 10:47:27)
Difficulty: 3 of 5Under Sphere Intersections (in Geometry)
Posted on 2015-11-11 (4 Comments)
Some Thoughts My thinking on it. by Charlie (2015-11-11 15:28:50)
Difficulty: 2 of 5Under Count the palindromes (in Just Math)
Posted on 2015-11-11 (7 Comments)
Solution computer solution by Charlie (2015-11-11 10:27:25)
Difficulty: 3 of 5Under Wise saw (in General)
Posted on 2015-11-10 (3 Comments)
re: 2/3 solution (spoiler) by Charlie (2015-11-10 14:04:57)
Difficulty: 2 of 5Under Tiling and counting (in Numbers)
Posted on 2015-11-10 (2 Comments)
Solution He's back by Charlie (2015-11-10 10:49:22)
Difficulty: 3 of 5Under ….to skin a cat (in Logic)
Posted on 2015-11-09 (5 Comments)
re(3): The one that seems obvious by Charlie (2015-11-09 21:54:27)
Some Thoughts The one that seems obvious by Charlie (2015-11-09 12:38:10)
Difficulty: 3 of 5Under Cryptajoke XI (in Cryptography)
Posted on 2015-11-09 (1 Comments)
Solution spoilers by Charlie (2015-11-09 10:32:52)
Difficulty: 4 of 5Under Cons and vows (in Word Problems)
Posted on 2015-11-06 (6 Comments)
#3 by Charlie (2015-11-09 07:55:24)
Difficulty: 2 of 5Under Four factors (in Just Math)
Posted on 2015-11-06 (2 Comments)
Solution by induction, not rigorous by Charlie (2015-11-06 09:56:37)
Difficulty: 4 of 5Under Matching pairs II (in Word Problems)
Posted on 2015-11-05 (3 Comments)
re(2): most paired up,- except the redundant ones by Charlie (2015-11-06 07:46:30)
Some Thoughts most paired up by Charlie (2015-11-05 15:42:36)
Difficulty: 3 of 5Under An interesting matrix (in Sequences)
Posted on 2015-11-05 (3 Comments)
re(2): solution -- calculations by computer by Charlie (2015-11-05 19:21:30)
Solution solution -- calculations by computer by Charlie (2015-11-05 10:06:29)
Difficulty: 3 of 5Under 10 4 7 10 (in Just Math)
Posted on 2015-11-03 (2 Comments)
Solution computer solutions by Charlie (2015-11-03 14:31:07)
Difficulty: 2 of 5Under Two and only two (in Just Math)
Posted on 2015-11-03 (4 Comments)
re: a quick look by Charlie (2015-11-03 14:58:18)
Some Thoughts a quick look by Charlie (2015-11-03 08:50:28)
Difficulty: 3 of 5Under Seven numbers for seven words (in Cryptography)
Posted on 2015-11-02 (1 Comments)
Solution computer assisted solution by Charlie (2015-11-02 14:48:09)
Difficulty: 3 of 5Under Diophantine Linear and Quadratic (in Just Math)
Posted on 2015-11-01 (4 Comments)
Solution computer solution by Charlie (2015-11-01 13:26:19)
re: Analytical solution (spoiler) by Charlie (2015-11-01 13:04:04)
Difficulty: 4 of 5Under Incredible, but solvable (in Just Math)
Posted on 2015-10-30 (11 Comments)
re: @ Charlie- an explanation and a question by Charlie (2015-10-31 21:23:38)
re(5): comp. aided solution -- HINT by Charlie (2015-10-31 08:07:16)
re(4): comp. aided solution -- HINT by Charlie (2015-10-31 07:59:05)
Solution re(2): computer aided solution -- continued by Charlie (2015-10-30 15:28:09)
Solution re: computer aided solution -- continued by Charlie (2015-10-30 15:26:16)
Solution computer aided solution by Charlie (2015-10-30 15:23:50)
Difficulty: 2 of 5Under A plural of a plural (in Word Problems)
Posted on 2015-10-30 (5 Comments)
Solution What moderns do with Latin by Charlie (2015-10-30 10:25:35)
Difficulty: 3 of 5Under Term Sum Settlement (in Sequences)
Posted on 2015-10-29 (3 Comments)
Solution Well, it could have been solved manually, but... by Charlie (2015-10-29 14:31:45)
Difficulty: 3 of 5Under No peace (in Word Problems)
Posted on 2015-10-29 (4 Comments)
re: Some clarifications by Charlie (2015-10-30 10:29:09)
Some Thoughts Most, but not all by Charlie (2015-10-29 09:49:17)
Difficulty: 2 of 5Under Some questions of abundance (in Just Math)
Posted on 2015-10-28 (3 Comments)
re(2): proposed solution / counterexample by Charlie (2015-10-28 13:06:43)
Solution proposed solution by Charlie (2015-10-28 10:38:43)
Difficulty: 3 of 5Under Real Number Resolution 2 (in Just Math)
Posted on 2015-10-27 (1 Comments)
Solution proposed solution by Charlie (2015-10-27 16:00:01)
Difficulty: 3 of 5Under Numbered Letters IV (in Word Problems)
Posted on 2015-10-26 (2 Comments)
Solution computer solution by Charlie (2015-10-26 15:37:59)
Difficulty: 2 of 5Under Magic matrix (in Just Math)
Posted on 2015-10-26 (1 Comments)
Solution computer solution by Charlie (2015-10-26 10:55:37)
Difficulty: 3 of 5Under Sum Equality and Perfect Square (in Just Math)
Posted on 2015-10-25 (2 Comments)
Solution computer solution by Charlie (2015-10-25 14:44:58)
Difficulty: 2 of 5Under Must differ by 3 (in Just Math)
Posted on 2015-10-23 (3 Comments)
Solution computer proof by Charlie (2015-10-23 13:03:39)
Difficulty: 2 of 5Under Extend the list (in Word Problems)
Posted on 2015-10-22 (2 Comments)
Solution some more by Charlie (2015-10-22 21:46:42)
Difficulty: 3 of 5Under More ones (in Just Math)
Posted on 2015-10-21 (1 Comments)
Solution computer solution by Charlie (2015-10-21 15:27:42)
Difficulty: 3 of 5Under Distinct Values Determination (in Just Math)
Posted on 2015-10-20 (4 Comments)
the missing values by Charlie (2015-10-20 11:44:21)
Solution computer solution differs by Charlie (2015-10-20 11:25:46)
Difficulty: 3 of 5Under Factorials & factorions (in Numbers)
Posted on 2015-10-19 (2 Comments)
Solution computer solution by Charlie (2015-10-19 14:42:49)
Difficulty: 2 of 5Under Will you find it? (in Cryptography)
Posted on 2015-10-19 (2 Comments)
It, or them? by Charlie (2015-10-19 14:39:45)
Difficulty: 4 of 5Under Generalizing (in Geometry)
Posted on 2015-10-16 (2 Comments)
Some Thoughts just offhand... by Charlie (2015-10-16 22:28:38)
Difficulty: 3 of 5Under Palindromes and Divisibility (in Just Math)
Posted on 2015-10-16 (3 Comments)
Solution re: analytic solution by Charlie (2015-10-16 14:16:53)
Solution computer solution by Charlie (2015-10-16 10:50:58)
Difficulty: 3 of 5Under Oblong Difference Observation (in Just Math)
Posted on 2015-10-15 (3 Comments)
Solution two more solutions (computer solutions) by Charlie (2015-10-15 13:58:20)
Difficulty: 2 of 5Under Same digits - 3 cubes (in Numbers)
Posted on 2015-10-14 (1 Comments)
Solution computer solution by Charlie (2015-10-14 10:45:14)
Difficulty: 3 of 5Under Triangular and Square Settlement (in Just Math)
Posted on 2015-10-13 (7 Comments)
extended list by Charlie (2015-10-14 08:09:55)
Solution computer solution by Charlie (2015-10-13 15:34:15)
Difficulty: 3 of 5Under Integer Count Illation (in Just Math)
Posted on 2015-10-12 (1 Comments)
Solution solution by Charlie (2015-10-12 15:29:02)
Difficulty: 2 of 5Under Count them correctly (in Numbers)
Posted on 2015-10-12 (2 Comments)
Solution same answer by Charlie (2015-10-12 10:42:20)
Difficulty: 4 of 5Under Permutations count redux (in Numbers)
Posted on 2015-10-09 (1 Comments)
Some Thoughts first simpler consideration by Charlie (2015-10-12 13:46:19)
Difficulty: 3 of 5Under Integer Function Finding (in Just Math)
Posted on 2015-10-09 (1 Comments)
Some Thoughts computer guided guess by Charlie (2015-10-09 11:22:43)
Difficulty: 3 of 5Under sum of digits and 100th term (in Sequences)
Posted on 2015-10-08 (3 Comments)
Solution I did miss something in the previous post. by Charlie (2015-10-09 08:27:51)
Solution I've probably miscounted but here goes. by Charlie (2015-10-08 21:24:23)
Difficulty: 2 of 5Under 8 digit rhyme (in Cryptography)
Posted on 2015-10-08 (1 Comments)
Solution solution (spoiler) by Charlie (2015-10-08 10:44:23)
Difficulty: 3 of 5Under Non zero product (in Just Math)
Posted on 2015-10-07 (1 Comments)
Solution computer assisted calculation by Charlie (2015-10-07 20:02:02)
Difficulty: 3 of 5Under Digit sum and digit product equality (in Just Math)
Posted on 2015-10-06 (2 Comments)
Solution computer aided solution by Charlie (2015-10-06 20:28:06)
Difficulty: 3 of 5Under Random Choice (in Probability)
Posted on 2015-10-02 (1 Comments)
Solution solution by Charlie (2015-10-02 10:25:48)
Difficulty: 3 of 5Under Permutations count (in Numbers)
Posted on 2015-10-01 (10 Comments)
I guess simplicity is in the mind of the user by Charlie (2015-10-02 09:57:08)
Solution solution by Charlie (2015-10-01 16:02:09)
Difficulty: 2 of 5Under Phrase find ponder (in Word Problems)
Posted on 2015-10-01 (6 Comments)
re(2): first undoubtedly incorrect thoughts by Charlie (2015-10-01 16:11:55)
Difficulty: 3 of 5Under Extreme Sum Settlement (in Just Math)
Posted on 2015-09-28 (4 Comments)
re: Solution (barring errors) by Charlie (2015-09-28 16:02:04)
Solution the computer doesn't tire of writing the numbers by Charlie (2015-09-28 15:56:47)
Difficulty: 1 of 5Under Cryptajoke IX (in Cryptography)
Posted on 2015-09-28 (2 Comments)
Solution way by Charlie (2015-09-28 10:31:35)
Difficulty: 5 of 5Under 9-letter word (in Numbers)
Posted on 2015-09-25 (6 Comments)
re(2): computer solutions by Charlie (2015-09-26 07:35:38)
Solution computer solutions by Charlie (2015-09-25 16:15:56)
Difficulty: 4 of 5Under Quit as a winner (in Games)
Posted on 2015-09-24 (8 Comments)
re(2): some research (spoiler) by Charlie (2015-09-24 18:35:16)
Solution some research (spoiler) by Charlie (2015-09-24 16:26:17)
further fine tuning by Charlie (2015-09-24 15:47:31)
re: computer exploration by Charlie (2015-09-24 15:38:36)
Some Thoughts computer exploration by Charlie (2015-09-24 15:05:47)
Difficulty: 3 of 5Under Cheryl's b-day (in Logic)
Posted on 2015-09-24 (2 Comments)
Solution solution by Charlie (2015-09-24 10:16:36)
Difficulty: 2 of 5Under Three brothers (in Just Math)
Posted on 2015-09-23 (1 Comments)
Solution solution by Charlie (2015-09-23 11:25:20)
Difficulty: 3 of 5Under Less Than 2015 (in Just Math)
Posted on 2015-09-22 (3 Comments)
re(2): computer solution -- trying to explain it by Charlie (2015-09-23 15:56:46)
Solution computer solution by Charlie (2015-09-22 17:23:10)
Difficulty: 2 of 5Under Hexakosioihexekontahexaphobia (in General)
Posted on 2015-09-22 (3 Comments)
Solution It seems... by Charlie (2015-09-22 10:02:04)
Difficulty: 3 of 5Under Rook Placement (in Games)
Posted on 2015-09-21 (5 Comments)
re: Detailed solution (SPOILER) by Charlie (2015-09-26 07:51:35)
Difficulty: 3 of 5Under Three Power and Product Divisibility (in Just Math)
Posted on 2015-09-19 (2 Comments)
Some Thoughts re: computer exploration by Charlie (2015-09-20 18:58:36)
Some Thoughts computer exploration by Charlie (2015-09-20 07:56:20)
Difficulty: 3 of 5Under Expression Product Exercise (in Just Math)
Posted on 2015-09-18 (5 Comments)
even UBASIC can get only to 8 in direct calculation by Charlie (2015-09-20 08:23:36)
Some Thoughts computer exploration -- far from a proof by Charlie (2015-09-18 12:37:49)
Difficulty: 2 of 5Under 2 easy cryptajokes (VIII) (in Cryptography)
Posted on 2015-09-18 (3 Comments)
Some Thoughts caught the thief -- not the fish by Charlie (2015-09-18 09:21:00)
Difficulty: 3 of 5Under Some definite results (in Numbers)
Posted on 2015-09-17 (5 Comments)
re: non-analytic solution by Charlie (2015-09-18 08:27:49)
Difficulty: 3 of 5Under Marissa's and Melissa's birthdays (in Logic)
Posted on 2015-09-17 (1 Comments)
Solution solution with some computer assistance by Charlie (2015-09-17 12:20:00)
Difficulty: 3 of 5Under Check divisibility (in Numbers)
Posted on 2015-09-16 (5 Comments)
re(2): computer exploration (probable spoiler) by Charlie (2015-09-17 07:47:38)
Some Thoughts computer exploration (probable spoiler) by Charlie (2015-09-16 16:13:12)
Difficulty: 3 of 5Under Coordinating arrival (in Just Math)
Posted on 2015-09-15 (2 Comments)
Solution solution by Charlie (2015-09-15 10:57:22)
Difficulty: 3 of 5Under C reverses into F (in Numbers)
Posted on 2015-09-14 (10 Comments)
re(2): computer exploration ....... att ALL by Charlie (2015-09-15 07:51:08)
Question re: A valiant attempt by Charlie (2015-09-14 20:30:42)
Some Thoughts computer exploration by Charlie (2015-09-14 16:19:42)
Difficulty: 3 of 5Under Square Sum and Square Multiple (in Just Math)
Posted on 2015-09-13 (2 Comments)
Solution An extended list -- Using Visual Basic by Charlie (2015-09-13 14:54:43)
Difficulty: 2 of 5Under Prime Ratio Possibility (in Just Math)
Posted on 2015-09-11 (3 Comments)
Solution solution by Charlie (2015-09-11 11:04:22)
Difficulty: 3 of 5Under Fair? (in Games)
Posted on 2015-09-10 (10 Comments)
re: A's strategy by Charlie (2015-09-17 19:29:03)
re: Solution by Charlie (2015-09-14 07:50:09)
re(2): solution by Charlie (2015-09-11 07:40:14)
Solution solution by Charlie (2015-09-10 17:16:31)
Difficulty: 3 of 5Under One-liners (in General)
Posted on 2015-09-09 (4 Comments)
oh, yes; forgot this by Charlie (2015-09-09 20:01:53)
Solution mostly computer solution by Charlie (2015-09-09 15:49:58)
Difficulty: 1 of 5Under Three-syllable word (in Tricks)
Posted on 2015-09-07 (3 Comments)
Solution probably... by Charlie (2015-09-07 12:38:11)
Difficulty: 3 of 5Under Quadratic and Quartic Query (in Just Math)
Posted on 2015-09-06 (3 Comments)
Solution computer solution -- the 33 lowest. by Charlie (2015-09-06 14:13:34)
Difficulty: 3 of 5Under Simultaneous Pythagorean Poser 2 (in Just Math)
Posted on 2015-09-05 (4 Comments)
Solution corrected computer solution by Charlie (2015-09-06 08:46:20)
computer solution by Charlie (2015-09-05 12:48:30)
Difficulty: 2 of 5Under Six countries (in General)
Posted on 2015-09-04 (8 Comments)
re: Alternate solution by Charlie (2015-09-04 18:22:38)
Solution re(3): If only! (more of a spoiler) by Charlie (2015-09-04 15:32:13)
Hints/Tips re: If only! (more of a spoiler) by Charlie (2015-09-04 10:56:00)
Difficulty: 3 of 5Under Not Variety, but... (in Word Problems)
Posted on 2015-09-03 (4 Comments)
re(2): Sorry, wrong answers (spoiler) by Charlie (2015-09-04 07:28:20)
Difficulty: 2 of 5Under Digit Product Puzzle (in Probability)
Posted on 2015-09-03 (3 Comments)
Solution re(2): analytic solution -- corrected by Charlie (2015-09-03 16:32:01)
analytic solution by Charlie (2015-09-03 11:06:44)
Difficulty: 3 of 5Under Arithmetic and Power Puzzle (in Just Math)
Posted on 2015-09-02 (2 Comments)
Some Thoughts computer exploration by Charlie (2015-09-02 15:08:39)
Difficulty: 3 of 5Under Surprising answer (in Probability)
Posted on 2015-09-02 (6 Comments)
Solution solution by Charlie (2015-09-02 11:45:16)
Difficulty: 3 of 5Under Muchos idiomas (in Word Problems)
Posted on 2015-09-01 (1 Comments)
Solution computer solution by Charlie (2015-09-01 16:09:14)
Difficulty: 3 of 5Under Convex Hexagon and Ratio Product (in Shapes)
Posted on 2015-09-01 (3 Comments)
re(2): metasolution by Charlie (2015-09-01 15:56:20)
Solution metasolution by Charlie (2015-09-01 09:59:46)
Difficulty: 3 of 5Under Cryptajoke VII (in Word Problems)
Posted on 2015-08-31 (2 Comments)
Solution solution (spoiler) by Charlie (2015-08-31 15:46:48)
Difficulty: 3 of 5Under Homophone Hunt 2 (in Word Problems)
Posted on 2015-08-31 (3 Comments)
another by Charlie (2015-08-31 09:57:39)
Difficulty: 2 of 5Under A Fibo quadruplet (in Numbers)
Posted on 2015-08-28 (1 Comments)
Solution solution by Charlie (2015-08-28 11:05:46)
Difficulty: 3 of 5Under What am I ? (in Riddles)
Posted on 2015-08-27 (1 Comments)
Solution You are... by Charlie (2015-08-27 09:49:41)
Difficulty: 3 of 5Under Divide et impera part two (in Numbers)
Posted on 2015-08-26 (2 Comments)
Some Thoughts Much data but no proof--computer exploration by Charlie (2015-08-26 12:58:28)
Difficulty: 2 of 5Under Only 2 answers (in Numbers)
Posted on 2015-08-26 (3 Comments)
re(2): computer solution by Charlie (2015-08-26 14:30:25)
Solution computer solution by Charlie (2015-08-26 11:17:03)
Difficulty: 3 of 5Under Hockey pucks (in Logic)
Posted on 2015-08-25 (1 Comments)
Solution solution by Charlie (2015-08-25 14:31:58)
Difficulty: 3 of 5Under Year and Perfect Square Puzzle (in Just Math)
Posted on 2015-08-22 (2 Comments)
Solution computer solution by Charlie (2015-08-22 15:55:34)
Difficulty: 2 of 5Under Numbers in pi (in Numbers)
Posted on 2015-08-21 (3 Comments)
Solution computer solution by Charlie (2015-08-21 10:34:23)
Difficulty: 3 of 5Under Three coins (in Probability)
Posted on 2015-08-20 (10 Comments)
re(6): question by Charlie (2015-08-23 15:08:46)
re(4): question by Charlie (2015-08-22 07:40:37)
re(2): question by Charlie (2015-08-20 15:34:30)
Question question by Charlie (2015-08-20 13:48:19)
Difficulty: 3 of 5Under Visit USA (in General)
Posted on 2015-08-20 (9 Comments)
Some Thoughts If the goal is... by Charlie (2015-08-20 10:42:57)
re: solution by Charlie (2015-08-20 10:39:14)
Difficulty: 3 of 5Under A self-working card trick (in Tricks)
Posted on 2015-08-19 (1 Comments)
Solution solution by Charlie (2015-08-19 15:17:04)
Difficulty: 3 of 5Under This or that? (in Probability)
Posted on 2015-08-19 (4 Comments)
Solution My take on it by Charlie (2015-08-19 10:03:55)
Difficulty: 2 of 5Under Divide et impera (in Numbers)
Posted on 2015-08-18 (2 Comments)
Solution three computer solutions by Charlie (2015-08-18 12:02:45)
Difficulty: 3 of 5Under Perfect Square Digit (in Just Math)
Posted on 2015-08-17 (2 Comments)
Some Thoughts Can't find any under 10 billion by Charlie (2015-08-18 08:01:58)
Difficulty: 2 of 5Under Ez & true (in Riddles)
Posted on 2015-08-17 (1 Comments)
Solution The saying by Charlie (2015-08-18 07:54:46)
Difficulty: 3 of 5Under Non-perfect Cube Root Sum (in Just Math)
Posted on 2015-08-14 (6 Comments)
re: An idea by Charlie (2015-08-14 13:28:01)
Difficulty: 3 of 5Under Rooting for 2015 (in Just Math)
Posted on 2015-08-14 (3 Comments)
Solution confirmed solution by Charlie (2015-08-14 10:22:22)
Difficulty: 3 of 5Under Arithmetic Product Puzzle (in Sequences)
Posted on 2015-08-13 (1 Comments)
Solution computer solution by Charlie (2015-08-13 14:52:35)
Difficulty: 3 of 5Under Eight efficient blacksmiths (in Just Math)
Posted on 2015-08-13 (4 Comments)
Solution re: solution by Charlie (2015-08-13 09:31:05)
Solution solution by Charlie (2015-08-13 09:26:03)
Difficulty: 3 of 5Under Power and Divisibility Puzzle (in Just Math)
Posted on 2015-08-12 (6 Comments)
Solution computer solution by Charlie (2015-08-12 15:50:13)
Difficulty: 1 of 5Under Simpler probability problem? (in Probability)
Posted on 2015-08-11 (14 Comments)
re(2): I think I'm beginning to understand what Ady's saying by Charlie (2015-08-13 09:20:42)
I think I'm beginning to understand what Ady's saying by Charlie (2015-08-12 19:36:15)
re(4): solution by Charlie (2015-08-12 14:46:30)
simulation of 100 trials by Charlie (2015-08-12 12:27:43)
re(4): solution by Charlie (2015-08-12 12:08:07)
re: re. difficulty level by Charlie (2015-08-12 08:57:18)
re(2): solution by Charlie (2015-08-12 08:42:24)
Solution solution by Charlie (2015-08-11 15:56:22)
Difficulty: 3 of 5Under Positive Integer and Power Puzzle (in Logic)
Posted on 2015-08-10 (1 Comments)
Solution computer solution by Charlie (2015-08-10 19:23:20)
Difficulty: 1 of 5Under Oddday (in Numbers)
Posted on 2015-08-10 (4 Comments)
re: No math on vacation by Charlie (2015-08-11 15:55:16)
Difficulty: 3 of 5Under Clever counting (in Numbers)
Posted on 2015-08-07 (6 Comments)
re: Part b researched solution by Charlie (2015-08-08 08:20:18)
Solution Part b researched solution by Charlie (2015-08-07 23:04:25)
re(2): part a computer solution wrong? by Charlie (2015-08-07 22:27:09)
Solution part a computer solution by Charlie (2015-08-07 18:59:07)
Difficulty: 2 of 5Under Largest pandigital prime. (in Numbers)
Posted on 2015-08-07 (1 Comments)
Solution computer solution by Charlie (2015-08-07 12:21:30)
Difficulty: 3 of 5Under one 3 or one 7 puzzle (in Just Math)
Posted on 2015-08-06 (3 Comments)
Solution computer solution by Charlie (2015-08-06 13:30:07)
Difficulty: 3 of 5Under Factorial Ratio Sum Puzzle (in Calculus)
Posted on 2015-08-04 (3 Comments)
Solution computer solution: It quickly converges by Charlie (2015-08-04 09:14:25)
Difficulty: 2 of 5Under Odd and Even 2 (in Just Math)
Posted on 2015-08-03 (4 Comments)
Solution computer solution by Charlie (2015-08-03 10:15:05)
re: solution by Charlie (2015-08-03 09:53:39)
Difficulty: 3 of 5Under Ocean Anagram – Not (in Word Problems)
Posted on 2015-07-31 (3 Comments)
Solution re: a d1 solution by Charlie (2015-07-31 09:12:36)
Difficulty: 3 of 5Under Best guess (in Probability)
Posted on 2015-07-30 (3 Comments)
re(2): computer solution -- a mathematical-type formula by Charlie (2015-08-01 08:24:47)
Solution computer solution by Charlie (2015-07-30 14:56:26)
Difficulty: 3 of 5Under Red, White, and Blue (in Logic)
Posted on 2015-07-29 (4 Comments)
Solution computer proof by Charlie (2015-07-29 14:35:28)
Difficulty: 2 of 5Under Perfect Power Puzzle (in Just Math)
Posted on 2015-07-29 (5 Comments)
re: full solution........................SPOILER by Charlie (2015-07-29 10:16:47)
re: full solution........................SPOILER by Charlie (2015-07-29 10:00:18)
Solution computer solution by Charlie (2015-07-29 09:58:22)
Difficulty: 3 of 5Under No letters (in Cryptography)
Posted on 2015-07-27 (2 Comments)
Solution I learn to initialize arrays in VB 5 by Charlie (2015-07-27 14:20:25)
Difficulty: 3 of 5Under Integer Triangle Side Puzzle (in Shapes)
Posted on 2015-07-26 (1 Comments)
Solution computer solution by Charlie (2015-07-26 10:56:57)
Difficulty: 3 of 5Under Linear and Quadratic Sum Puzzle (in Just Math)
Posted on 2015-07-25 (3 Comments)
re: computer-aided solution by Charlie (2015-07-25 13:30:24)
Solution computer-aided solution by Charlie (2015-07-25 13:22:55)
Difficulty: 2 of 5Under Nine trolls (in Just Math)
Posted on 2015-07-23 (9 Comments)
re(2): computer solution by Charlie (2015-07-23 12:22:03)
re: computer solution by Charlie (2015-07-23 12:15:34)
Solution computer solution by Charlie (2015-07-23 11:57:51)
re: computer solution by Charlie (2015-07-23 11:37:25)
Some Thoughts only a start by Charlie (2015-07-23 08:27:41)
Difficulty: 3 of 5Under One of the countries (in Word Problems)
Posted on 2015-07-22 (2 Comments)
Solution computer solution by Charlie (2015-07-22 15:46:50)
Difficulty: 3 of 5Under Yearly Division (in Just Math)
Posted on 2015-07-22 (1 Comments)
Solution solution by Charlie (2015-07-22 13:39:52)
Difficulty: 3 of 5Under Initial Term Identification (in Sequences)
Posted on 2015-07-21 (3 Comments)
Solution electronically computed by Charlie (2015-07-21 15:08:06)
Difficulty: 2 of 5Under Phrase Reconstruction Puzzle (in Word Problems)
Posted on 2015-07-21 (5 Comments)
re: What's the point? by Charlie (2015-07-22 08:14:53)
Solution answer by Charlie (2015-07-21 11:09:44)
Difficulty: 2 of 5Under Guessing suit (in Probability)
Posted on 2015-07-20 (13 Comments)
Some Thoughts simulation by Charlie (2015-07-21 10:25:25)
re: senseless task ! by Charlie (2015-07-20 11:09:49)
Difficulty: 3 of 5Under Picking numbers (in Probability)
Posted on 2015-07-17 (7 Comments)
re: Solution by Charlie (2015-07-29 10:22:14)
Solution computer solution by Charlie (2015-07-17 15:11:20)
re: Analytical Solution (spoiler) by Charlie (2015-07-17 15:08:32)
Difficulty: 3 of 5Under Pasta wrestling (in Word Problems)
Posted on 2015-07-17 (1 Comments)
Solution solution by Charlie (2015-07-17 10:53:58)
Difficulty: 3 of 5Under Smallest Perfect Cube Puzzle (in Just Math)
Posted on 2015-07-15 (2 Comments)
Solution simulation of manual trials by Charlie (2015-07-15 16:19:57)
Solution computer assisted solution by Charlie (2015-07-15 16:03:18)
Difficulty: 2 of 5Under Pieces of eight (in Just Math)
Posted on 2015-07-15 (2 Comments)
Solution some computer aid by Charlie (2015-07-15 10:46:46)
Difficulty: 3 of 5Under Powers of Ten (in Sequences)
Posted on 2015-07-14 (7 Comments)
re: Pwerful answer (spoiler) by Charlie (2015-07-14 16:14:00)
Difficulty: 4 of 5Under Bean coloring (in Probability)
Posted on 2015-07-13 (11 Comments)
re(3):Correcting My previous analytical solution by Charlie (2015-07-15 21:42:51)
re(2):Correcting My previous analytical solution by Charlie (2015-07-15 16:39:37)
Solution Further exact values using UBASIC by Charlie (2015-07-14 10:42:50)
re: computer aided solution by Charlie (2015-07-13 19:44:27)
Solution computer aided solution by Charlie (2015-07-13 18:49:13)
Difficulty: 3 of 5Under Beginning and End (in Just Math)
Posted on 2015-07-11 (6 Comments)
The Fibonacci connection by Charlie (2015-07-12 08:52:04)
Solution More precision with UBASIC computer program by Charlie (2015-07-11 09:36:36)
Difficulty: 3 of 5Under Long Reverse Rigor (in Word Problems)
Posted on 2015-07-10 (3 Comments)
Solution words with 15 or more letters, with lengths by Charlie (2015-07-10 19:14:53)
Difficulty: 3 of 5Under Inverse Quadratic Sum Puzzle (in Just Math)
Posted on 2015-07-09 (1 Comments)
Solution steps with some internet help by Charlie (2015-07-09 12:56:06)
Difficulty: 3 of 5Under Inverse Expression Exercise (in Just Math)
Posted on 2015-07-07 (1 Comments)
Some Thoughts probabile solution by Charlie (2015-07-07 16:50:57)
Difficulty: 3 of 5Under From ab to yz (in Word Problems)
Posted on 2015-07-06 (5 Comments)
re: computer solution by Charlie (2015-07-06 16:11:55)
Solution computer solution by Charlie (2015-07-06 15:57:15)
Difficulty: 3 of 5Under Simultaneous Pythagorean Poser (in Just Math)
Posted on 2015-07-04 (4 Comments)
re: solution by Charlie (2015-07-04 16:00:25)
Difficulty: 3 of 5Under Quite a triplet (in Numbers)
Posted on 2015-07-02 (10 Comments)
re(4): computer solution -- prolonged search by Charlie (2015-07-04 08:06:14)
re(2): computer solution -- prolonged search by Charlie (2015-07-03 11:36:27)
re: more info by Charlie (2015-07-03 07:56:45)
Solution computer solution by Charlie (2015-07-02 15:49:37)
Difficulty: 2 of 5Under Chinatown's problem (in Numbers)
Posted on 2015-07-02 (3 Comments)
Solution solution with some explanation by Charlie (2015-07-02 09:19:53)
Difficulty: 4 of 5Under One 1 to Six 6's (in Probability)
Posted on 2015-07-01 (14 Comments)
re: Solution for n=2 and 3, and some observations by Charlie (2015-07-30 09:11:20)
re(4): computer aided solution by Charlie (2015-07-02 15:41:55)
re(2): computer aided solution by Charlie (2015-07-02 15:34:07)
re(3): computer aided solution by Charlie (2015-07-02 09:39:18)
Solution re(2): computer aided solution by Charlie (2015-07-02 09:09:49)
Solution computer aided solution by Charlie (2015-07-01 17:00:33)
Difficulty: 2 of 5Under Mathematical Term (in Word Problems)
Posted on 2015-07-01 (4 Comments)
Solution answer by Charlie (2015-07-01 10:15:27)
Difficulty: 3 of 5Under More than linear (in Just Math)
Posted on 2015-06-30 (1 Comments)
Solution computer solution by Charlie (2015-06-30 16:19:44)
Difficulty: 3 of 5Under How many subsets? (in Just Math)
Posted on 2015-06-29 (3 Comments)
Solution computer solution by Charlie (2015-06-29 19:43:37)
Difficulty: 2 of 5Under Ship Anagram - Not (in Word Problems)
Posted on 2015-06-29 (4 Comments)
re(2): Ahoy! (spoiler) by Charlie (2015-06-30 09:16:36)
Difficulty: 1 of 5Under Factorial creates prime (in Numbers)
Posted on 2015-06-26 (4 Comments)
Hints/Tips Would it help if ... by Charlie (2015-06-26 11:38:46)
Difficulty: 2 of 5Under It is not 8^5 (in Numbers)
Posted on 2015-06-24 (3 Comments)
Solution re: Solution (Spoiler) by Charlie (2015-06-24 09:48:19)
Difficulty: 3 of 5Under Cubic and Factorial Puzzle (in Just Math)
Posted on 2015-06-23 (1 Comments)
Solution computer solution by Charlie (2015-06-23 11:39:47)
Difficulty: 3 of 5Under Find the lowest n (in Numbers)
Posted on 2015-06-22 (4 Comments)
re: A few other n by Charlie (2015-06-23 07:24:20)
Difficulty: 3 of 5Under All possible integer determination (in Just Math)
Posted on 2015-06-20 (1 Comments)
Solution computer solution by Charlie (2015-06-20 14:44:33)
Difficulty: 4 of 5Under 7 idiomatic phrases (in Word Problems)
Posted on 2015-06-17 (2 Comments)
Some Thoughts a start by Charlie (2015-06-17 13:55:42)
Difficulty: 3 of 5Under One triplet out (in Numbers)
Posted on 2015-06-16 (3 Comments)
Solution computer solution by Charlie (2015-06-16 15:05:58)
Difficulty: 3 of 5Under Expression Quotient Puzzle (in Just Math)
Posted on 2015-06-16 (3 Comments)
re: Some, maybe all by Charlie (2015-06-16 12:08:54)
Difficulty: 2 of 5Under On his way to fitness (in Just Math)
Posted on 2015-06-15 (10 Comments)
Solution Using calculator app and Excel by Charlie (2015-06-16 08:59:42)
re: A geometrical approach by Charlie (2015-06-15 14:45:15)
Difficulty: 3 of 5Under Bivariate Quadratic Puzzle (in Just Math)
Posted on 2015-06-14 (2 Comments)
Solution computer exploration gives probable solution by Charlie (2015-06-14 11:28:53)
Difficulty: 3 of 5Under Yearly Diophantine Puzzle (in Just Math)
Posted on 2015-06-12 (1 Comments)
Solution computer solution by Charlie (2015-06-12 15:23:04)
Difficulty: 3 of 5Under p^10 is special (in Numbers)
Posted on 2015-06-12 (1 Comments)
Solution computer solution by Charlie (2015-06-12 11:01:57)
Difficulty: 1 of 5Under Lefties and righties (in Logic)
Posted on 2015-06-10 (2 Comments)
Solution solution by Charlie (2015-06-10 11:11:41)
Difficulty: 3 of 5Under Cube root sum equality puzzle (in Just Math)
Posted on 2015-06-09 (2 Comments)
Solution computer solution by Charlie (2015-06-09 15:54:15)
Difficulty: 3 of 5Under A chain of five (in Word Problems)
Posted on 2015-06-08 (2 Comments)
Solution computer solution by Charlie (2015-06-08 21:59:37)
Difficulty: 2 of 5Under Eleven Letter Exercise (in Word Problems)
Posted on 2015-06-08 (3 Comments)
re(2): answer by Charlie (2015-06-11 08:45:02)
re: answer by Charlie (2015-06-08 10:20:54)
Difficulty: 3 of 5Under Find Points, Maximise Ratio (in Shapes)
Posted on 2015-06-05 (6 Comments)
re(3): solution (continued) by Charlie (2015-06-05 16:02:17)
re(2): solution (continued) by Charlie (2015-06-05 16:00:52)
re: solution by Charlie (2015-06-05 15:59:04)
Solution computer finding by Charlie (2015-06-05 15:51:30)
Difficulty: 3 of 5Under 5 76993 408621 (in Numbers)
Posted on 2015-06-04 (3 Comments)
Solution computer aided solution by Charlie (2015-06-04 14:28:11)
Difficulty: 3 of 5Under Three Quotients and Integer Puzzle (in Just Math)
Posted on 2015-06-03 (4 Comments)
Solution I get (with computer program) by Charlie (2015-06-03 15:56:14)
Difficulty: 2 of 5Under Logical, or not? (in General)
Posted on 2015-06-01 (4 Comments)
Solution solution by Charlie (2015-06-01 12:35:04)
Difficulty: 4 of 5Under Just vowels (in General)
Posted on 2015-05-29 (9 Comments)
Some Thoughts My take on it by Charlie (2015-05-29 15:56:40)
Difficulty: 2 of 5Under Rational or not? (in Just Math)
Posted on 2015-05-29 (5 Comments)
re(2): solution by Charlie (2015-05-31 14:09:48)
Solution solution by Charlie (2015-05-29 10:09:45)
Difficulty: 3 of 5Under No neighbors allowed (in Numbers)
Posted on 2015-05-22 (2 Comments)
Solution solution by Charlie (2015-05-22 15:37:25)
Difficulty: 2 of 5Under One, two, eight etc (in Numbers)
Posted on 2015-05-22 (2 Comments)
Solution adding overbars for large squares by Charlie (2015-05-22 13:05:09)
Solution computer solution not considering overlining for large squares by Charlie (2015-05-22 10:52:38)
Difficulty: 3 of 5Under Cuboid Concern (in Shapes)
Posted on 2015-05-21 (2 Comments)
Solution If I didn't make any mistakes along the way by Charlie (2015-05-21 16:16:16)
Difficulty: 2 of 5Under Back to throne (in Probability)
Posted on 2015-05-21 (3 Comments)
Solution computer exploration and solution by Charlie (2015-05-21 10:34:51)
Difficulty: 2 of 5Under Three consecutive letters (in Word Problems)
Posted on 2015-05-20 (4 Comments)
Solution re: Other examples by Charlie (2015-05-21 10:49:16)
Difficulty: 3 of 5Under 3 squares and 5 ways puzzle (in Just Math)
Posted on 2015-05-19 (1 Comments)
Solution computer solution by Charlie (2015-05-19 15:11:37)
Difficulty: 3 of 5Under 7G vs 7B (in General)
Posted on 2015-05-18 (2 Comments)
Solution No Subject by Charlie (2015-05-18 22:14:51)
Difficulty: 1 of 5Under A sequence or not a sequence? (in Logic)
Posted on 2015-05-18 (3 Comments)
Some Thoughts In China and in Ancient Rome by Charlie (2015-05-18 11:14:30)
Some Thoughts Of course... by Charlie (2015-05-18 09:54:09)
Difficulty: 2 of 5Under Random numbers sum together (in Probability)
Posted on 2015-05-15 (3 Comments)
re(2): solution: as presented and with a complication by Charlie (2015-05-15 13:56:06)
Solution solution: as presented and with a complication by Charlie (2015-05-15 11:01:51)
Difficulty: 2 of 5Under Sextic Settlement (in Just Math)
Posted on 2015-05-13 (6 Comments)
re(2): Counterexample by Charlie (2015-05-13 11:20:47)
Difficulty: 2 of 5Under How far can you go? (in Numbers)
Posted on 2015-05-12 (6 Comments)
Solution computer exploration by Charlie (2015-05-12 10:26:36)
Difficulty: 3 of 5Under Cabbagehead’s neighbors (in Word Problems)
Posted on 2015-05-08 (3 Comments)
Some Thoughts computer findings by Charlie (2015-05-08 10:51:07)
Difficulty: 4 of 5Under Rhyme time (in Word Problems)
Posted on 2015-05-07 (6 Comments)
Some Thoughts a further start by Charlie (2015-05-07 09:46:34)
Difficulty: 3 of 5Under 4 primes (in Numbers)
Posted on 2015-05-06 (3 Comments)
Solution computer solution by Charlie (2015-05-06 15:40:46)
Difficulty: 2 of 5Under Poor primes (in Numbers)
Posted on 2015-05-04 (1 Comments)
Solution computer solution by Charlie (2015-05-04 19:22:39)
Difficulty: 3 of 5Under Odd men out (in Logic)
Posted on 2015-04-29 (6 Comments)
re: Special numbers by Charlie (2015-04-30 11:00:43)
Solution starting out by Charlie (2015-04-29 10:20:14)
Difficulty: 3 of 5Under Largest palindrome (in Numbers)
Posted on 2015-04-27 (4 Comments)
re(2): program solution by Charlie (2015-04-28 08:11:18)
Solution program solution by Charlie (2015-04-27 19:23:24)
Difficulty: 3 of 5Under Not solvable by computer (?) (in Word Problems)
Posted on 2015-04-24 (5 Comments)
Solution computer plus human finds only one by Charlie (2015-04-24 12:59:57)
Difficulty: 3 of 5Under Downward Pair Reading (in Word Problems)
Posted on 2015-04-24 (4 Comments)
re: solution(s) by Charlie (2015-04-24 21:21:09)
Solution computer solution by Charlie (2015-04-24 11:04:56)
Difficulty: 3 of 5Under Consecutive Count (in Sequences)
Posted on 2015-04-23 (4 Comments)
Solution revised program by Charlie (2015-04-24 21:49:59)
Solution computer solution by Charlie (2015-04-23 15:29:35)
Difficulty: 4 of 5Under Three's a company (in General)
Posted on 2015-04-23 (7 Comments)
re(2): And #11 by Charlie (2015-04-26 08:34:23)
Some Thoughts 1,2,3,,,7,8,,10 by Charlie (2015-04-23 09:20:04)
Difficulty: 3 of 5Under Consecutive Deletion (in Just Math)
Posted on 2015-04-22 (1 Comments)
Solution computer solution by Charlie (2015-04-22 14:20:58)
Difficulty: 3 of 5Under Geographic entities (in General)
Posted on 2015-04-20 (3 Comments)
Some Thoughts re(2): computer assisted solution /bonus task by Charlie (2015-04-21 07:45:16)
Solution computer assisted solution by Charlie (2015-04-20 15:28:27)
Difficulty: 2 of 5Under N as a sum of factorials (in Just Math)
Posted on 2015-04-20 (1 Comments)
Solution solution by Charlie (2015-04-20 09:56:06)
Difficulty: 3 of 5Under Some powers decomposed (in Numbers)
Posted on 2015-04-16 (5 Comments)
re: Thoughts from OEIS by Charlie (2015-04-17 11:43:19)
Solution computer solution: differently ordered list by Charlie (2015-04-17 07:59:36)
Difficulty: 3 of 5Under Number Count Conclusion (in Just Math)
Posted on 2015-04-15 (4 Comments)
Solution computer solution by Charlie (2015-04-15 16:25:15)
Difficulty: 2 of 5Under 2^(10n) (in Numbers)
Posted on 2015-04-15 (8 Comments)
re(4): worked out by Charlie (2015-04-17 14:09:41)
re(2): worked out by Charlie (2015-04-16 08:06:54)
Solution worked out by Charlie (2015-04-15 09:01:19)
Difficulty: 3 of 5Under Integer Triangle Trial (in Shapes)
Posted on 2015-04-14 (1 Comments)
Solution solution by Charlie (2015-04-14 10:42:14)
Difficulty: 3 of 5Under Non-empty sets element count (in Just Math)
Posted on 2015-04-13 (5 Comments)
Solution solution by Charlie (2015-04-13 14:22:49)
Difficulty: 3 of 5Under Deux Power Divisibility (in Algorithms)
Posted on 2015-04-12 (3 Comments)
Some Thoughts continuation of Jer's table by Charlie (2015-04-12 13:27:24)
Difficulty: 3 of 5Under Long chain (in Numbers)
Posted on 2015-04-10 (7 Comments)
Solution lesson learned by Charlie (2015-04-11 08:32:42)
Some Thoughts computer exploration by Charlie (2015-04-10 20:46:20)
Difficulty: 4 of 5Under From product to town (in Word Problems)
Posted on 2015-04-10 (2 Comments)
Solution computer assisted solution by Charlie (2015-04-10 11:07:50)
Difficulty: 4 of 5Under Bright light (in Science)
Posted on 2015-04-09 (9 Comments)
re: Interesting question. by Charlie (2015-04-10 07:35:28)
comparison with an actual case by Charlie (2015-04-09 20:05:18)
re(2): GSP Model disagrees with the previous posts by Charlie (2015-04-09 17:14:21)
re: GSP Model disagrees with the previous posts by Charlie (2015-04-09 16:15:01)
what I get by Charlie (2015-04-09 13:03:18)
Difficulty: 3 of 5Under Some sums (in Numbers)
Posted on 2015-04-07 (3 Comments)
Solution computer solution by Charlie (2015-04-07 14:34:22)
Difficulty: 2 of 5Under Buddy, can you spare a buck? (in Numbers)
Posted on 2015-04-03 (3 Comments)
Hmmm... by Charlie (2015-04-03 10:13:26)
Difficulty: 3 of 5Under Domain and Range (in Just Math)
Posted on 2015-04-02 (1 Comments)
Some Thoughts Somewhat satisfying answer by Charlie (2015-04-02 14:13:46)
Difficulty: 3 of 5Under The Case of the Mixtup Calendar (in General)
Posted on 2015-04-02 (1 Comments)
Some Thoughts I think.... by Charlie (2015-04-02 10:00:39)
Difficulty: 3 of 5Under Reflection Matrix (in Just Math)
Posted on 2015-04-01 (3 Comments)
Solution completing the derivation by Charlie (2015-04-02 08:50:32)
Solution researched solution by Charlie (2015-04-01 16:10:17)
Difficulty: 3 of 5Under Function Function Function Function Foray (in Just Math)
Posted on 2015-03-31 (2 Comments)
Solution computer solution to both parts; analytic solution for part 2 by Charlie (2015-03-31 14:43:39)
Difficulty: 3 of 5Under Nine times SSD (in Just Math)
Posted on 2015-03-30 (1 Comments)
Solution computer solution by Charlie (2015-03-30 22:04:20)
Difficulty: 2 of 5Under How many solutions? (in Just Math)
Posted on 2015-03-30 (1 Comments)
Solution solution by Charlie (2015-03-30 09:12:24)
Difficulty: 3 of 5Under Neighboring tickets (in Numbers)
Posted on 2015-03-26 (2 Comments)
Solution computer solution by Charlie (2015-03-26 15:21:20)
Difficulty: 2 of 5Under Island Adventure (in Liars and Knights)
Posted on 2015-03-26 (1 Comments)
Solution solution by Charlie (2015-03-26 10:02:29)
Difficulty: 3 of 5Under Zero Sum Expression (in Just Math)
Posted on 2015-03-25 (2 Comments)
Some Thoughts computer exploration by Charlie (2015-03-25 15:44:18)
Difficulty: 3 of 5Under Win some, lose some II (in Just Math)
Posted on 2015-03-25 (1 Comments)
Solution solution by Charlie (2015-03-25 08:41:08)
Difficulty: 3 of 5Under Long list (in Word Problems)
Posted on 2015-03-24 (2 Comments)
Some Thoughts a computer list by Charlie (2015-03-24 15:28:03)
Difficulty: 3 of 5Under Growing fast (in Numbers)
Posted on 2015-03-23 (4 Comments)
re: correction- ............... see before solving by Charlie (2015-03-24 07:43:06)
Just a note by Charlie (2015-03-23 15:45:30)
Difficulty: 3 of 5Under Rectangular Rearrangement Resolution (in Shapes)
Posted on 2015-03-20 (5 Comments)
further by Charlie (2015-03-20 11:00:28)
Difficulty: 3 of 5Under 123456789 scrambled (in Numbers)
Posted on 2015-03-19 (6 Comments)
re(3): computer solution by Charlie (2015-03-20 07:49:52)
Solution computer solution by Charlie (2015-03-19 15:29:27)
Difficulty: 3 of 5Under Isosceles Crease (in Shapes)
Posted on 2015-03-19 (2 Comments)
Solution solution by Charlie (2015-03-19 11:28:48)
Difficulty: 3 of 5Under +Q-U : Quite Unusual (in Word Problems)
Posted on 2015-03-17 (2 Comments)
Some Thoughts list by Charlie (2015-03-17 15:21:53)
Difficulty: 2 of 5Under Log Inequality Illation (in Just Math)
Posted on 2015-03-17 (4 Comments)
re(2): solution by Charlie (2015-03-18 07:52:22)
Solution solution by Charlie (2015-03-17 09:56:07)
Difficulty: 3 of 5Under Pentagon Fraction Minimizing (in Just Math)
Posted on 2015-03-16 (2 Comments)
Solution solution by Charlie (2015-03-16 13:16:19)
Difficulty: 2 of 5Under Musical Term - Not (in Word Problems)
Posted on 2015-03-16 (2 Comments)
Solution re: full solution........................SPOILER by Charlie (2015-03-16 10:06:02)
Difficulty: 3 of 5Under Linear and Quadratic Square (in Just Math)
Posted on 2015-03-15 (4 Comments)
Solution computer solution by Charlie (2015-03-15 12:52:08)
Difficulty: 3 of 5Under Five Cards III (in Logic)
Posted on 2015-03-13 (3 Comments)
Solution computer solution by Charlie (2015-03-13 15:42:15)
Difficulty: 3 of 5Under Location, location, location (in Geometry)
Posted on 2015-03-12 (8 Comments)
re(4): To answer the question... (a GSP picture is worth a thousand words) by Charlie (2015-03-14 08:02:57)
re: To answer the question... by Charlie (2015-03-12 19:58:01)
Difficulty: 3 of 5Under Deux Digit Deduction II (in Just Math)
Posted on 2015-03-12 (4 Comments)
Solution last two digits in base 12 by Charlie (2015-03-12 10:56:05)
Difficulty: 3 of 5Under Root sum equals integer (in Just Math)
Posted on 2015-03-10 (7 Comments)
re(3): solution & playing around by Charlie (2015-03-10 15:54:20)
re: solution & playing around by Charlie (2015-03-10 14:40:30)
Solution with the assistance of a computer language that can handle complex intermediate terms by Charlie (2015-03-10 14:21:27)
Difficulty: 3 of 5Under Unity Root Count (in Just Math)
Posted on 2015-03-09 (2 Comments)
re: solution -- showing a sample of the ways of each product by Charlie (2015-03-09 21:49:09)
Solution solution by Charlie (2015-03-09 17:39:29)
Difficulty: 4 of 5Under 3 sets of primes (in Numbers)
Posted on 2015-03-08 (1 Comments)
Solution computer solution by Charlie (2015-03-08 12:53:52)
Difficulty: 3 of 5Under Divisor Count Conclusion (in Just Math)
Posted on 2015-03-06 (2 Comments)
Solution re: solution -- same answer, a different way by Charlie (2015-03-06 10:39:41)
Difficulty: 3 of 5Under Painting high dimension cubes (in Shapes)
Posted on 2015-03-05 (4 Comments)
re: Thoughts by Charlie (2015-03-14 07:52:06)
Solution solution by Charlie (2015-03-05 15:41:41)
Difficulty: 2 of 5Under Find the last member (in Sequences)
Posted on 2015-03-05 (1 Comments)
Solution computer solution by Charlie (2015-03-05 10:48:21)
Difficulty: 3 of 5Under Line Ratio Resolution (in Shapes)
Posted on 2015-03-04 (4 Comments)
re(3): Possible solution -- but using Geometers Sketchpad by Charlie (2015-03-05 11:07:20)
re: Possible solution -- but using Geometers Sketchpad by Charlie (2015-03-05 08:01:11)
Difficulty: 2 of 5Under Minimizing Perimeter (in Shapes)
Posted on 2015-03-04 (15 Comments)
re(6): NO DICE.....not a spoiler by Charlie (2015-03-06 19:37:44)
re: A triangle that works, may not be minimum (spoiler) by Charlie (2015-03-04 10:17:17)
Solution computer solution by Charlie (2015-03-04 09:33:20)
Difficulty: 3 of 5Under Contradict Goldbach (in Numbers)
Posted on 2015-03-03 (2 Comments)
Solution computer assisted solution by Charlie (2015-03-03 13:24:17)
Difficulty: 2 of 5Under Phrase a question II (in Numbers)
Posted on 2015-03-03 (2 Comments)
re: What is... (solution) by Charlie (2015-03-03 11:01:33)
Difficulty: 3 of 5Under Rearranged Resolution II (in Word Problems)
Posted on 2015-03-02 (4 Comments)
re: computer solutions by Charlie (2015-03-02 14:09:24)
Solution computer solutions by Charlie (2015-03-02 14:05:05)
Difficulty: 3 of 5Under Academia, defeated, yesterday (in Word Problems)
Posted on 2015-02-26 (6 Comments)
re(2): computer solutions by Charlie (2015-02-26 19:52:38)
Solution computer solutions by Charlie (2015-02-26 12:07:52)
Difficulty: 2 of 5Under Next year vs the current year (in Numbers)
Posted on 2015-02-25 (5 Comments)
Solution with some computer assistance by Charlie (2015-02-25 10:50:12)
Difficulty: 1 of 5Under Composite prime (in Numbers)
Posted on 2015-02-24 (2 Comments)
Solution smallest and beyond--computer exploration (spoiler) by Charlie (2015-02-24 11:11:57)
Difficulty: 3 of 5Under Be consistent (in Numbers)
Posted on 2015-02-20 (3 Comments)
Some Thoughts first thoughts by Charlie (2015-02-20 13:15:07)
Difficulty: 2 of 5Under Not too much (in Numbers)
Posted on 2015-02-20 (8 Comments)
Some Thoughts re(2): Is this valid? no ! - partial spoiler by Charlie (2015-02-20 15:16:45)
Difficulty: 3 of 5Under Double a triangle (in Sequences)
Posted on 2015-02-19 (3 Comments)
Some Thoughts The first few pairs by Charlie (2015-02-19 14:07:43)
Difficulty: 2 of 5Under Repeated Words (in Word Problems)
Posted on 2015-02-19 (4 Comments)
Solution re: Could it be . . .? (spoiler added) by Charlie (2015-02-19 10:49:46)
Difficulty: 3 of 5Under A modified die (in Numbers)
Posted on 2015-02-18 (3 Comments)
Solution computer solution by Charlie (2015-02-18 14:07:55)
Difficulty: 2 of 5Under The final quantity (in Numbers)
Posted on 2015-02-18 (4 Comments)
Solution computer solution by Charlie (2015-02-18 10:27:51)
Difficulty: 3 of 5Under Approximating radicals (in Numbers)
Posted on 2015-02-17 (4 Comments)
Some Thoughts discussion by Charlie (2015-02-17 16:31:49)
Difficulty: 2 of 5Under z is a word (in Word Problems)
Posted on 2015-02-17 (1 Comments)
Solution solution by Charlie (2015-02-17 11:18:27)
Difficulty: 3 of 5Under Golfer Gauge (in Word Problems)
Posted on 2015-02-16 (4 Comments)
Some Thoughts (ii) by Charlie (2015-02-16 15:25:52)
Difficulty: 2 of 5Under Phrase a question I (in Numbers)
Posted on 2015-02-16 (2 Comments)
Solution computer solutions by Charlie (2015-02-16 09:19:51)
Difficulty: 3 of 5Under Distinct Values Derivation (in General)
Posted on 2015-02-15 (2 Comments)
Solution re: computer solution -- what was I thinking? by Charlie (2015-02-18 19:43:50)
Solution computer solution by Charlie (2015-02-15 14:18:04)
Difficulty: 3 of 5Under An ancient Egyptian problem (in Just Math)
Posted on 2015-02-13 (5 Comments)
Solution computer solutions by Charlie (2015-02-13 15:20:11)
Difficulty: 2 of 5Under Bound the product (in Numbers)
Posted on 2015-02-13 (4 Comments)
Some Thoughts Some facts that may aid in finding a proof by Charlie (2015-02-13 10:49:00)
Difficulty: 3 of 5Under Date Deduction II (in General)
Posted on 2015-02-12 (1 Comments)
Solution solution by Charlie (2015-02-12 15:59:49)
Difficulty: 2 of 5Under Inequality (in Just Math)
Posted on 2015-02-11 (5 Comments)
re: Trigonometric solution by Charlie (2015-02-12 08:57:31)
Solution graphic solution by Charlie (2015-02-11 10:39:34)
Difficulty: 3 of 5Under Shared by squares (in Algorithms)
Posted on 2015-02-10 (3 Comments)
Some Thoughts re: A start by Charlie (2015-02-10 19:44:38)
Some Thoughts some thoughts by Charlie (2015-02-10 19:26:46)
Difficulty: 3 of 5Under Total Triplet Treat (in Shapes)
Posted on 2015-02-09 (1 Comments)
Solution computer solution by Charlie (2015-02-09 14:40:57)
Difficulty: 2 of 5Under A simple gematria (in Numbers)
Posted on 2015-02-09 (3 Comments)
Some Thoughts a few proper names by Charlie (2015-02-09 11:35:24)
Difficulty: 3 of 5Under The LSD of Prime Numbers (in Numbers)
Posted on 2015-02-08 (1 Comments)
Solution computer solution by Charlie (2015-02-08 16:15:06)
Difficulty: 3 of 5Under Very very colourful (in General)
Posted on 2015-02-06 (2 Comments)
Some Thoughts 5 through 8 by Charlie (2015-02-06 10:19:18)
Difficulty: 3 of 5Under Rooting for Roots (in Just Math)
Posted on 2015-02-04 (2 Comments)
Solution solution by Charlie (2015-02-04 15:25:24)
Difficulty: 2 of 5Under Mr Mar & Mrs Bles (in Numbers)
Posted on 2015-02-04 (1 Comments)
Solution solution by Charlie (2015-02-04 11:04:05)
Difficulty: 3 of 5Under Palindromes from Digit Sum Series (in Numbers)
Posted on 2015-02-03 (1 Comments)
Solution open ended solution/discussion by Charlie (2015-02-03 14:31:41)
Difficulty: 3 of 5Under Happy Numbers (in Numbers)
Posted on 2015-02-02 (1 Comments)
Solution computer solution by Charlie (2015-02-02 15:29:50)
Difficulty: 3 of 5Under Ellis Number (in Numbers)
Posted on 2015-01-31 (1 Comments)
Solution computer solution by Charlie (2015-01-31 14:53:59)
Difficulty: 3 of 5Under Find From Floor (in Just Math)
Posted on 2015-01-30 (4 Comments)
Solution solution by Charlie (2015-01-30 14:36:09)
Difficulty: 2 of 5Under Integer Triplets with a Difference (in Numbers)
Posted on 2015-01-30 (6 Comments)
Solution computer solution by Charlie (2015-01-30 10:31:52)
Difficulty: 3 of 5Under A Self-Terminating Sequence (in Numbers)
Posted on 2015-01-29 (1 Comments)
Solution computer solution by Charlie (2015-01-29 14:41:58)
Difficulty: 3 of 5Under Date Count Conclusion (in General)
Posted on 2015-01-29 (1 Comments)
Solution computer solution (spoiler) by Charlie (2015-01-29 09:50:44)
Difficulty: 3 of 5Under Phrase Anagram Ponder (in Word Problems)
Posted on 2015-01-28 (3 Comments)
Used an anagram program for IV (spoiler for IV) by Charlie (2015-01-28 13:09:49)
II by Charlie (2015-01-28 12:52:18)
Difficulty: 2 of 5Under ProSum Numbers (in Numbers)
Posted on 2015-01-28 (5 Comments)
looking farther -- the lowest 4-sequence by Charlie (2015-01-28 15:05:54)
re(2): computer solution -- corrected program by Charlie (2015-01-28 13:38:55)
Solution computer solution by Charlie (2015-01-28 11:19:45)
Difficulty: 3 of 5Under Hat #10 (in Word Problems)
Posted on 2015-01-27 (4 Comments)
re: some computer findings by Charlie (2015-01-28 07:37:28)
Some Thoughts some computer findings by Charlie (2015-01-27 15:41:41)
Difficulty: 3 of 5Under Integral Proof (in Numbers)
Posted on 2015-01-26 (3 Comments)
Some Thoughts no proof, but the integer is... (spoiler) by Charlie (2015-01-26 13:24:51)
Difficulty: 3 of 5Under Deux Difference Deduction (in Sequences)
Posted on 2015-01-23 (8 Comments)
Solution computer solution by Charlie (2015-01-23 15:20:44)
Difficulty: 2 of 5Under What price glory? (in Games)
Posted on 2015-01-22 (5 Comments)
Solution If there isn't an even better strategy... (spoiler?) by Charlie (2015-01-22 11:13:59)
Difficulty: 3 of 5Under Deux Digit Deduction (in Just Math)
Posted on 2015-01-21 (2 Comments)
Solution computer solution -- last 6 digits of each by Charlie (2015-01-21 12:52:16)
Difficulty: 1 of 5Under Not hehe (in Word Problems)
Posted on 2015-01-21 (5 Comments)
Some Thoughts probably not one of the two by Charlie (2015-01-21 10:04:33)
Difficulty: 2 of 5Under 4 clues (in Numbers)
Posted on 2015-01-19 (3 Comments)
Solution computer solution by Charlie (2015-01-19 11:47:55)
Difficulty: 3 of 5Under Chinese New Year (in General)
Posted on 2015-01-16 (8 Comments)
re: computer solution by Charlie (2015-01-19 07:48:02)
Solution re(2): computer solution -- the JavaScript code by Charlie (2015-01-17 12:14:08)
re(2): computer solution by Charlie (2015-01-17 08:45:48)
re: computer solution -- the JavaScript code by Charlie (2015-01-16 20:38:08)
Solution computer solution by Charlie (2015-01-16 20:30:14)
testing by Charlie (2015-01-16 15:16:05)
Difficulty: 2 of 5Under Squares and Rectangles II (in Just Math)
Posted on 2015-01-16 (2 Comments)
detail on the rectangle counts by Charlie (2015-01-16 10:10:39)
Difficulty: 3 of 5Under Paramount Polygon Poser (in Shapes)
Posted on 2015-01-15 (3 Comments)
Solution computer assisted solution by Charlie (2015-01-15 10:14:13)
Difficulty: 3 of 5Under Three conditions define a triplet (in Just Math)
Posted on 2015-01-14 (2 Comments)
Solution computer solution by Charlie (2015-01-14 22:24:18)
Difficulty: 2 of 5Under Square Sum Settlement (in Just Math)
Posted on 2015-01-14 (3 Comments)
Solution computer solution (spoiler) by Charlie (2015-01-14 10:47:33)
Difficulty: 3 of 5Under Celsius Fahrenheit Check (in Just Math)
Posted on 2015-01-13 (1 Comments)
Solution not taking up the extra challenge--(spoiler) by Charlie (2015-01-13 14:38:01)
Difficulty: 3 of 5Under Find the remainder (in Just Math)
Posted on 2015-01-09 (3 Comments)
Solution re: possible solution (spoiler) -- computer confirmation by Charlie (2015-01-09 10:45:34)
Difficulty: 3 of 5Under Units Digit Determination (in Just Math)
Posted on 2015-01-07 (3 Comments)
Solution corrected computer summation by Charlie (2015-01-08 07:59:42)
Solution Adding up those 9-digit numbers by Charlie (2015-01-07 15:12:43)
Difficulty: 2 of 5Under Cows and buffaloes. (in Just Math)
Posted on 2015-01-07 (2 Comments)
Solution computer solution by Charlie (2015-01-07 10:30:39)
Difficulty: 2 of 5Under More than a million, less than ten (in Just Math)
Posted on 2015-01-06 (4 Comments)
Solution re(2): More than 3000, less than 8, computer solutions by Charlie (2015-01-09 08:29:13)
Solution More than 3000, less than 8, computer solutions by Charlie (2015-01-06 09:30:05)
Difficulty: 3 of 5Under Dates data distribution (in Just Math)
Posted on 2015-01-05 (3 Comments)
re(2): computer-aided solution by Charlie (2015-01-05 21:18:59)
Solution computer-aided solution by Charlie (2015-01-05 15:54:59)
Difficulty: 3 of 5Under Sum Productive Digits (in Just Math)
Posted on 2014-12-31 (2 Comments)
Solution computer solutions by Charlie (2014-12-31 12:14:30)
Difficulty: 2 of 5Under A simple inequality (in Just Math)
Posted on 2014-12-31 (4 Comments)
Some Thoughts no proof--just demonstration by Charlie (2014-12-31 11:08:03)
Difficulty: 3 of 5Under Binomial Baffle (in Just Math)
Posted on 2014-12-30 (2 Comments)
Solution computer solution by Charlie (2014-12-30 14:35:48)
Difficulty: 2 of 5Under Neither is prime (in Just Math)
Posted on 2014-12-30 (2 Comments)
Solution 10101 by Charlie (2014-12-30 10:55:15)
Difficulty: 2 of 5Under Reverse Role II (in Just Math)
Posted on 2014-12-29 (2 Comments)
computer solution by Charlie (2014-12-29 09:56:16)
Difficulty: 3 of 5Under Region Area Ascertainment (in Just Math)
Posted on 2014-12-28 (4 Comments)
re: My region isn't reaching (spoiler) by Charlie (2014-12-28 12:02:52)
Difficulty: 3 of 5Under Three Digit Travail (in Probability)
Posted on 2014-12-26 (1 Comments)
Solution computer solution by Charlie (2014-12-26 14:58:12)
Difficulty: 3 of 5Under Hexadecimal Digit Travail (in Just Math)
Posted on 2014-12-25 (5 Comments)
re(4): computer solution by Charlie (2014-12-25 20:55:51)
re(2): computer solution by Charlie (2014-12-25 18:30:15)
Solution computer solution by Charlie (2014-12-25 14:01:32)
Difficulty: 3 of 5Under Pie Pieces (in Just Math)
Posted on 2014-12-24 (2 Comments)
Solution solutions by 2 methods, computer aided by Charlie (2014-12-24 14:00:42)
Difficulty: 3 of 5Under Omega to Alpha Observation (in Just Math)
Posted on 2014-12-23 (5 Comments)
Solution computer solutions by Charlie (2014-12-23 15:09:46)
Difficulty: 2 of 5Under Count the Liars (in Liars and Knights)
Posted on 2014-12-23 (6 Comments)
re: Figures don't lie, but liars do figure (spoiler) by Charlie (2014-12-23 11:15:55)
Difficulty: 3 of 5Under 2014 Prime Treat (in Probability)
Posted on 2014-12-22 (1 Comments)
Solution computer solution and exploration by Charlie (2014-12-22 15:52:52)
Difficulty: 3 of 5Under LCM 540 (in Just Math)
Posted on 2014-12-22 (6 Comments)
re: No Subject by Charlie (2014-12-22 12:31:37)
Difficulty: 3 of 5Under Divisible by 28 (in Just Math)
Posted on 2014-12-21 (4 Comments)
Solution computer solution by Charlie (2014-12-21 21:08:21)
Difficulty: 3 of 5Under Arithmetic Numbers Enumeration (in Sequences)
Posted on 2014-12-19 (2 Comments)
Solution computer solution by Charlie (2014-12-19 15:29:55)
Difficulty: 3 of 5Under Origamic Revisited (in Shapes)
Posted on 2014-12-19 (1 Comments)
Some Thoughts playing with GSP by Charlie (2014-12-19 10:49:33)
Difficulty: 2 of 5Under Compare sizes (in Just Math)
Posted on 2014-12-18 (3 Comments)
Solution computer solution by Charlie (2014-12-18 20:24:15)
Difficulty: 2 of 5Under m & n (in Just Math)
Posted on 2014-12-18 (2 Comments)
Solution computer-aided solution by Charlie (2014-12-18 09:53:58)
Difficulty: 3 of 5Under Floor Fulfilment (in Just Math)
Posted on 2014-12-17 (2 Comments)
Solution computer evaluation by Charlie (2014-12-17 13:44:55)
Difficulty: 3 of 5Under Power Sum Poser (in Just Math)
Posted on 2014-12-16 (2 Comments)
Solution computer solution by Charlie (2014-12-16 15:22:16)
Difficulty: 3 of 5Under Cash and chit (in General)
Posted on 2014-12-15 (1 Comments)
Solution computer solution by Charlie (2014-12-15 13:47:25)
Difficulty: 3 of 5Under Cube Difference Deduction (in Just Math)
Posted on 2014-12-12 (2 Comments)
Solution computer solution by Charlie (2014-12-12 17:48:48)
Difficulty: 3 of 5Under Trigo inequality (in Just Math)
Posted on 2014-12-11 (11 Comments)
Some Thoughts re(5): solution. Useful (it's to be hoped) table by Charlie (2014-12-14 08:13:24)
re(3): solution by Charlie (2014-12-13 13:17:10)
Some Thoughts re: solution by Charlie (2014-12-13 08:07:18)
Question re: solution by Charlie (2014-12-12 07:45:30)
Difficulty: 3 of 5Under Year Yearn 2 (in General)
Posted on 2014-12-11 (4 Comments)
Solution between 1000 and 3000 -- computer solution by Charlie (2014-12-11 08:48:22)
Difficulty: 2 of 5Under Eight distances (in Just Math)
Posted on 2014-12-10 (4 Comments)
Solution can't be sure by Charlie (2014-12-10 10:12:45)
Difficulty: 3 of 5Under Distinct sod (in Just Math)
Posted on 2014-12-09 (1 Comments)
Solution computer solution by Charlie (2014-12-09 11:23:28)
Difficulty: 3 of 5Under Out of this word (in Word Problems)
Posted on 2014-12-08 (9 Comments)
Solution Most of a solution by Charlie (2014-12-08 10:26:15)
Difficulty: 3 of 5Under Two squares in a circle (in Geometry)
Posted on 2014-12-05 (4 Comments)
Solution solution by Charlie (2014-12-05 15:20:18)
Difficulty: 3 of 5Under Going North-East (in Just Math)
Posted on 2014-12-05 (4 Comments)
re: Another way to avoid tedium. by Charlie (2014-12-07 10:32:56)
Solution solution: computer used, to avoid tedium by Charlie (2014-12-05 09:40:23)
Difficulty: 3 of 5Under So close, but no closer... (in Just Math)
Posted on 2014-12-04 (5 Comments)
Solution computer assisted solution by Charlie (2014-12-04 14:21:37)
Difficulty: 4 of 5Under Test #7 (in Word Problems)
Posted on 2014-12-03 (7 Comments)
Solution computer solution by Charlie (2014-12-03 14:01:05)
Difficulty: 2 of 5Under Sibling Birthday Baffle (in Logic)
Posted on 2014-12-03 (1 Comments)
Solution answer by Charlie (2014-12-03 11:28:39)
Difficulty: 3 of 5Under Floor Equation (in Just Math)
Posted on 2014-12-02 (2 Comments)
Solution solution by Charlie (2014-12-02 14:02:29)
Difficulty: 3 of 5Under Consecutive Placement - Not (in Probability)
Posted on 2014-12-01 (1 Comments)
Solution computer assisted solution by Charlie (2014-12-01 16:23:18)
Difficulty: 3 of 5Under What not? (in General)
Posted on 2014-12-01 (4 Comments)
Some Thoughts re(2): My solution (spoiler?) by Charlie (2014-12-02 22:06:55)
Solution My solution (spoiler?) by Charlie (2014-12-01 08:41:05)
Difficulty: 2 of 5Under Seven Age Settlement (in Logic)
Posted on 2014-11-24 (4 Comments)
Solution No Subject by Charlie (2014-11-24 14:59:19)
Difficulty: 3 of 5Under To a fifth of the wind, that pierces us most (in Famous Riddles)
Posted on 2014-11-21 (1 Comments)
Hints/Tips Hints by Charlie (2014-11-21 12:24:00)
Difficulty: 3 of 5Under A symmetric relation (in Just Math)
Posted on 2014-11-19 (5 Comments)
re: The easy solution by Charlie (2014-11-19 08:42:49)
Some Thoughts The easy solution by Charlie (2014-11-19 08:40:36)
Difficulty: 3 of 5Under Real Resolution II (in Just Math)
Posted on 2014-11-18 (1 Comments)
Solution solution by Charlie (2014-11-18 14:36:03)
Difficulty: 3 of 5Under Missions impossible (in Just Math)
Posted on 2014-11-17 (3 Comments)
Solution solution by Charlie (2014-11-17 19:16:26)
Difficulty: 3 of 5Under Well said (in General)
Posted on 2014-11-17 (2 Comments)
re: Decrypting the quote (spoiler) by Charlie (2014-11-17 12:48:13)
Difficulty: 3 of 5Under Inconsiderable Integer Illation (in Just Math)
Posted on 2014-11-16 (10 Comments)
re: answer only by Charlie (2014-11-16 14:55:12)
Solution Actual answer -- calculator solution by Charlie (2014-11-16 14:50:58)
Difficulty: 3 of 5Under An aSCending SCale (in Word Problems)
Posted on 2014-11-14 (7 Comments)
re(2): some examples from the computer by Charlie (2014-11-15 07:39:18)
Some Thoughts some examples from the computer by Charlie (2014-11-14 14:21:21)
Difficulty: 3 of 5Under Deux Digit Determination (in Just Math)
Posted on 2014-11-13 (4 Comments)
re: Full expansion, but unproven result by Charlie (2014-11-13 14:29:50)
Solution computer solution by Charlie (2014-11-13 14:24:33)
Difficulty: 3 of 5Under Survival Surmise (in Logic)
Posted on 2014-11-12 (2 Comments)
Solution solution by Charlie (2014-11-12 15:27:36)
Difficulty: 2 of 5Under Hours of Operation (in Numbers)
Posted on 2014-11-12 (8 Comments)
Some Thoughts Longest for 12-hour clock: computer solution by Charlie (2014-11-13 08:15:01)
Some Thoughts re: Longest duration, 24 hour clock (spoiler) by Charlie (2014-11-13 08:07:14)
Difficulty: 3 of 5Under Austria or Italy ? (in Just Math)
Posted on 2014-11-11 (1 Comments)
Solution computer solution by Charlie (2014-11-11 15:44:30)
Difficulty: 3 of 5Under Composite Sum Satisfaction (in Just Math)
Posted on 2014-11-11 (4 Comments)
Solution computer solution by Charlie (2014-11-11 10:34:13)
Difficulty: 3 of 5Under Arrival Appraisal (in Science)
Posted on 2014-11-07 (2 Comments)
Solution different solution by Charlie (2014-11-07 20:45:06)
Difficulty: 2 of 5Under Philately Ponder (in Logic)
Posted on 2014-11-07 (3 Comments)
Solution solution by Charlie (2014-11-07 10:11:36)
Difficulty: 3 of 5Under Supreme Red Sox Surmise (in Probability)
Posted on 2014-11-06 (2 Comments)
Solution computer solution by Charlie (2014-11-06 11:05:58)
Difficulty: 3 of 5Under Box Volume Baffle (in Shapes)
Posted on 2014-11-05 (5 Comments)
Solution re(2): No Subject by Charlie (2014-11-06 14:43:23)
Some Thoughts No Subject by Charlie (2014-11-06 08:19:07)
Difficulty: 3 of 5Under RMS Rigor (in Just Math)
Posted on 2014-11-04 (4 Comments)
Some Thoughts computer check of all a from 1 to a million (spoiler) by Charlie (2014-11-04 20:32:00)
Difficulty: 3 of 5Under Square Choice Conclusion (in Probability)
Posted on 2014-11-04 (2 Comments)
Solution solution (spoiler) by Charlie (2014-11-04 08:33:07)
Difficulty: 3 of 5Under Win some, lose some (in Logic)
Posted on 2014-11-03 (1 Comments)
Some Thoughts discussion by Charlie (2014-11-03 15:57:12)
Difficulty: 2 of 5Under Fridays (in Numbers)
Posted on 2014-11-03 (1 Comments)
Solution computer solution by Charlie (2014-11-03 10:54:22)
Difficulty: 3 of 5Under Quadrilateral Quandary (in Shapes)
Posted on 2014-11-02 (1 Comments)
Some Thoughts Geometers' Sketchpad approximations by Charlie (2014-11-02 22:26:15)
Difficulty: 3 of 5Under Chairs galore (in Just Math)
Posted on 2014-10-31 (4 Comments)
Solution solution and discussion by Charlie (2014-10-31 10:19:44)
Difficulty: 3 of 5Under Identical Digit Baffle II (in Just Math)
Posted on 2014-10-30 (2 Comments)
Solution solution and also those in the middle by Charlie (2014-10-30 14:35:46)
Difficulty: 1 of 5Under Reply to this (in Just Math)
Posted on 2014-10-30 (3 Comments)
Solution solution by Charlie (2014-10-30 12:06:57)
Difficulty: 5 of 5Under Random^Random (in Probability)
Posted on 2014-10-29 (9 Comments)
Solution re: table of numeric integration by Charlie (2014-10-30 08:47:54)
re(2): table of numeric integration by Charlie (2014-10-30 08:34:08)
Solution table of numeric integration by Charlie (2014-10-29 15:41:37)
Some Thoughts re: towards an analytic solution - numeric integration by Charlie (2014-10-29 15:32:44)
Hints/Tips towards an analytic solution by Charlie (2014-10-29 14:35:18)
Some Thoughts numerical simulation by Charlie (2014-10-29 13:54:25)
Difficulty: 3 of 5Under Analyzing change (in Just Math)
Posted on 2014-10-28 (4 Comments)
Solution computer solution by Charlie (2014-10-28 12:22:14)
Difficulty: 3 of 5Under Hat #9 (in Word Problems)
Posted on 2014-10-27 (2 Comments)
Solution uncommented computer output by Charlie (2014-10-27 19:15:56)
Difficulty: 3 of 5Under Word Containment Contemplation (in Word Problems)
Posted on 2014-10-27 (3 Comments)
re: No Subject by Charlie (2014-10-27 14:21:23)
Difficulty: 3 of 5Under Uncommonly Common (in Riddles)
Posted on 2014-10-25 (4 Comments)
Some Thoughts one possibility by Charlie (2014-10-26 08:34:42)
Difficulty: 2 of 5Under Performance Probe (in Logic)
Posted on 2014-10-24 (2 Comments)
Solution computer solution by Charlie (2014-10-24 19:28:50)
Difficulty: 3 of 5Under Curious concatenations (in Numbers)
Posted on 2014-10-23 (1 Comments)
computer solutions by Charlie (2014-10-23 16:07:43)
Difficulty: 3 of 5Under Extending tic-tac-toe (in Just Math)
Posted on 2014-10-23 (6 Comments)
re: General Solution by Charlie (2014-10-23 10:25:31)
Solution computer solutions by Charlie (2014-10-23 10:21:55)
Some Thoughts 10-min p&p based on a misinterpretation -- not a solution by Charlie (2014-10-23 09:38:17)
Difficulty: 4 of 5Under Beaujolais Nouveau Day (in Probability)
Posted on 2014-10-22 (7 Comments)
Solution computer solution by Charlie (2014-10-22 16:12:59)
Difficulty: 1 of 5Under One by two (in Numbers)
Posted on 2014-10-22 (6 Comments)
Solution re: 19 solutions by Charlie (2014-10-22 11:17:13)
Difficulty: 3 of 5Under Distinct Decimal Digits (in Numbers)
Posted on 2014-10-21 (1 Comments)
Solution computer solutions by Charlie (2014-10-21 15:30:43)
Difficulty: 3 of 5Under Farmer Giles (in Just Math)
Posted on 2014-10-21 (4 Comments)
Some Thoughts re(2): solutions by Charlie (2014-10-22 07:45:10)
Solution solutions by Charlie (2014-10-21 10:36:47)
Difficulty: 3 of 5Under Cuisine Conclusion II (in Word Problems)
Posted on 2014-10-20 (5 Comments)
Solution computer-aided method by Charlie (2014-10-20 15:49:41)
Difficulty: 3 of 5Under Half odd, half even (in Numbers)
Posted on 2014-10-16 (3 Comments)
re: Answer by Charlie (2014-10-16 15:23:55)
Solution computer solution by Charlie (2014-10-16 15:07:00)
Difficulty: 3 of 5Under Distinct Values Validation (in Just Math)
Posted on 2014-10-16 (7 Comments)
Some Thoughts re: Alternative formulation, x+y+z <= 94 by Charlie (2014-10-16 14:59:55)
Some Thoughts Alternative formulation, while it had been in the queue by Charlie (2014-10-16 10:52:31)
Solution solution by Charlie (2014-10-16 10:39:49)
Difficulty: 3 of 5Under Reverse Role (in Just Math)
Posted on 2014-10-15 (4 Comments)
re(2): More Bases (spoiler) by Charlie (2014-10-15 14:37:39)
Difficulty: 3 of 5Under My products (in General)
Posted on 2014-10-15 (2 Comments)
Solution computer solution (spoiler) by Charlie (2014-10-15 10:28:44)
Difficulty: 3 of 5Under Ternary Sum Travail (in Probability)
Posted on 2014-10-14 (2 Comments)
Solution computer solution by Charlie (2014-10-14 14:55:57)
Difficulty: 3 of 5Under Dozen Word Amalgamation (in Word Problems)
Posted on 2014-10-13 (2 Comments)
Solution Learned a new word (spoiler) by Charlie (2014-10-13 15:21:06)
Difficulty: 2 of 5Under A versatile number (in Numbers)
Posted on 2014-10-13 (6 Comments)
manual solution to bonus is wrong by Charlie (2014-10-13 14:27:46)
Some Thoughts Bonus only--not the actual puzzle. by Charlie (2014-10-13 08:57:02)
Difficulty: 3 of 5Under Greatest GCD (in Sequences)
Posted on 2014-10-12 (5 Comments)
Some Thoughts computer exploration by Charlie (2014-10-12 14:17:06)
Difficulty: 4 of 5Under Cryptajoke II (in Cryptography)
Posted on 2014-10-11 (3 Comments)
Some Thoughts thoughts by Charlie (2014-10-12 10:39:32)
Difficulty: 3 of 5Under Arithmetic and Geometric Addle (in Sequences)
Posted on 2014-10-10 (3 Comments)
Solution computer solution by Charlie (2014-10-10 14:55:13)
Difficulty: 2 of 5Under Optimal location (in Just Math)
Posted on 2014-10-10 (2 Comments)
Solution solution (spoiler) by Charlie (2014-10-10 10:06:24)
Difficulty: 3 of 5Under A happy trio (in Probability)
Posted on 2014-10-09 (3 Comments)
Solution A better approximation by Charlie (2014-10-09 13:48:49)
Difficulty: 3 of 5Under Draw and go (in Probability)
Posted on 2014-10-08 (14 Comments)
re(3): short amendment att Charlie by Charlie (2014-10-13 15:25:25)
re: short amendment by Charlie (2014-10-11 22:32:53)
re(4): Solution or partial solution ... clarification by Charlie (2014-10-10 07:56:31)
Some Thoughts re(2): Solution or partial solution ... clarification by Charlie (2014-10-09 09:56:20)
Difficulty: 3 of 5Under Counting Crossings (in Geometry)
Posted on 2014-10-08 (7 Comments)
Some Thoughts wording by Charlie (2014-10-09 07:51:57)
Solution solution by Charlie (2014-10-08 13:12:45)
Difficulty: 3 of 5Under Zeroless or not? (in Probability)
Posted on 2014-10-07 (1 Comments)
Solution computer exploration by Charlie (2014-10-07 10:35:23)
Difficulty: 3 of 5Under Winning Ticket Tickle (in Probability)
Posted on 2014-10-06 (6 Comments)
re(2): computer aided solution by Charlie (2014-10-06 14:28:04)
Solution re: computer aided solution -- whoops!; 50 is not under 46 by Charlie (2014-10-06 14:23:44)
Some Thoughts computer aided solution by Charlie (2014-10-06 14:19:08)
Difficulty: 3 of 5Under Inverse Power Pact (in Just Math)
Posted on 2014-10-02 (2 Comments)
Solution The computer solution by Charlie (2014-10-02 10:47:53)
Difficulty: 4 of 5Under Why and when (in General)
Posted on 2014-10-01 (1 Comments)
Solution computer aided solution by Charlie (2014-10-01 15:51:47)
Difficulty: 2 of 5Under Get them up (in Just Math)
Posted on 2014-10-01 (5 Comments)
re(2): Unsatisfying computer proof by Charlie (2014-10-02 10:53:50)
Solution Unsatisfying computer proof by Charlie (2014-10-01 11:21:11)
Difficulty: 3 of 5Under Consecutive Conclusion (in Just Math)
Posted on 2014-09-30 (8 Comments)
re(2): two computer algorithm solutions by Charlie (2014-10-01 07:41:24)
Solution two computer algorithm solutions by Charlie (2014-09-30 18:40:42)
Difficulty: 3 of 5Under Square Result Rumination (in Just Math)
Posted on 2014-09-28 (6 Comments)
other types of cases by Charlie (2014-09-28 21:57:30)
Solution Technical solution--but a larger question remains. by Charlie (2014-09-28 09:04:20)
Difficulty: 3 of 5Under Simultaneous Satisfaction (in Just Math)
Posted on 2014-09-27 (2 Comments)
Solution computer solution and outline of a possible analytic method by Charlie (2014-09-27 15:17:56)
Difficulty: 3 of 5Under Cubic Minimum (in Just Math)
Posted on 2014-09-26 (7 Comments)
Solution computer solution by Charlie (2014-09-26 13:50:49)
re: ANSWER by Charlie (2014-09-26 13:47:41)
Difficulty: 2 of 5Under Only one basic solution II (in General)
Posted on 2014-09-26 (1 Comments)
Solution computer assisted solution by Charlie (2014-09-26 10:30:55)
Difficulty: 3 of 5Under Moving target (in Shapes)
Posted on 2014-09-25 (2 Comments)
Solution solution by Charlie (2014-09-25 19:13:59)
Difficulty: 3 of 5Under Mary, Mary, Quite Orderly (in Just Math)
Posted on 2014-09-24 (6 Comments)
Solution Part (ii) at last (?) by Charlie (2014-09-26 14:44:57)
Some Thoughts re(4): solution -- second thoughts on correction by Charlie (2014-09-25 09:53:12)
Some Thoughts re(3): solution -- corrected part (ii) it is hoped by Charlie (2014-09-25 09:42:30)
re(2): solution by Charlie (2014-09-25 07:48:06)
Solution solution by Charlie (2014-09-24 16:00:59)
Difficulty: 3 of 5Under Rectangle Color Rigor (in Just Math)
Posted on 2014-09-23 (4 Comments)
Solution a diagram by Charlie (2014-09-23 12:37:28)
Difficulty: 3 of 5Under Cinq Digit Choice (in Probability)
Posted on 2014-09-22 (1 Comments)
Solution computer solution (spoiler) by Charlie (2014-09-22 16:29:18)
Difficulty: 2 of 5Under Max and Min (in Just Math)
Posted on 2014-09-22 (3 Comments)
Solution computer solution by Charlie (2014-09-22 12:22:25)
Difficulty: 3 of 5Under Cuisine Conclusion (in Cryptography)
Posted on 2014-09-18 (1 Comments)
Solution solution (spoiler): middle four enough to answer the question by Charlie (2014-09-18 10:34:24)
Difficulty: 3 of 5Under Simultaneous Base Baffle (in Just Math)
Posted on 2014-09-17 (6 Comments)
Solution computer solution -- the good the bad and the ugly by Charlie (2014-09-17 15:42:06)
re: solution by Charlie (2014-09-17 15:36:48)
Difficulty: 3 of 5Under Adding to rolls (in Probability)
Posted on 2014-09-15 (1 Comments)
Solution solution by Charlie (2014-09-15 18:05:27)
Difficulty: 3 of 5Under n-dimensional spheres (in Just Math)
Posted on 2014-09-15 (2 Comments)
Some Thoughts The sequence, if my trig is right by Charlie (2014-09-15 08:26:49)
Difficulty: 4 of 5Under Inherited Veracity II (in Liars and Knights)
Posted on 2014-09-12 (2 Comments)
re: computer solution by Charlie (2014-09-14 07:47:05)
Solution computer solution by Charlie (2014-09-12 13:24:44)
Difficulty: 3 of 5Under Roy G Biv (in Probability)
Posted on 2014-09-11 (1 Comments)
Solution computer solution by Charlie (2014-09-11 16:36:33)
Difficulty: 3 of 5Under Digital Time (in General)
Posted on 2014-09-10 (1 Comments)
Solution computer solution and analysis by Charlie (2014-09-10 12:07:42)
Difficulty: 3 of 5Under Rooted to the Floor II (in Just Math)
Posted on 2014-09-08 (3 Comments)
Solution computer solution by Charlie (2014-09-08 17:28:37)
Difficulty: 2 of 5Under Identical Digit Baffle (in Just Math)
Posted on 2014-09-08 (2 Comments)
Solution computer solution by Charlie (2014-09-08 11:07:11)
Difficulty: 3 of 5Under 2 pandigital equations (in Numbers)
Posted on 2014-09-05 (4 Comments)
Solution computer solution by Charlie (2014-09-05 18:14:59)
Difficulty: 3 of 5Under Distinct Delivery Deduction (in Just Math)
Posted on 2014-09-04 (7 Comments)
Solution a computer solution by Charlie (2014-09-04 17:33:37)
Difficulty: 2 of 5Under 2015 digits (in Just Math)
Posted on 2014-09-04 (2 Comments)
Solution solution by Charlie (2014-09-04 11:22:35)
Difficulty: 3 of 5Under Sparse Sine Settlement (in Just Math)
Posted on 2014-09-03 (2 Comments)
Solution computer-aided solution by Charlie (2014-09-03 18:03:11)
Difficulty: 2 of 5Under Decimal Digits (in General)
Posted on 2014-09-02 (5 Comments)
Some Thoughts thoughts on (a) by Charlie (2014-09-02 14:10:31)
Difficulty: 1 of 5Under World War I sword (in Riddles)
Posted on 2014-09-02 (1 Comments)
Solution spoiler by Charlie (2014-09-02 14:02:29)
Difficulty: 3 of 5Under Cuboid Diagonal Conclusion (in Shapes)
Posted on 2014-09-01 (4 Comments)
Solution re: solution by Charlie (2014-09-01 21:54:16)
Some Thoughts solution by Charlie (2014-09-01 17:55:48)
Difficulty: 2 of 5Under Hi there, Pascal (in Numbers)
Posted on 2014-09-01 (2 Comments)
Solution computer solution by Charlie (2014-09-01 12:36:58)
Difficulty: 3 of 5Under Test #5 (in Word Problems)
Posted on 2014-08-31 (1 Comments)
Solution computer findings by Charlie (2014-08-31 13:13:28)
Difficulty: 3 of 5Under Triangular Triangulation (in Just Math)
Posted on 2014-08-30 (4 Comments)
Some Thoughts They do seem to keep on coming -- no proof either way by Charlie (2014-08-30 14:46:28)
Difficulty: 3 of 5Under Playing With Marbles II (in Probability)
Posted on 2014-08-29 (2 Comments)
simulation verification by Charlie (2014-08-29 12:16:17)
Solution solution by Charlie (2014-08-29 11:39:58)
Difficulty: 2 of 5Under Segment Section Settlement (in Probability)
Posted on 2014-08-28 (3 Comments)
Solution solution and verification by Charlie (2014-08-28 12:44:27)
Difficulty: 3 of 5Under Tetrahedra Trial (in Shapes)
Posted on 2014-08-27 (1 Comments)
Solution solution by Charlie (2014-08-27 19:39:03)
Difficulty: 3 of 5Under Concavity (in Calculus)
Posted on 2014-08-26 (2 Comments)
Solution observation by Charlie (2014-08-26 17:19:21)
Difficulty: 2 of 5Under One up (in Probability)
Posted on 2014-08-22 (1 Comments)
Solution With computer assistance by Charlie (2014-08-22 12:33:30)
Difficulty: 3 of 5Under Three tasks (in Just Math)
Posted on 2014-08-21 (3 Comments)
Solution computer solutions by Charlie (2014-08-21 16:53:45)
Difficulty: 2 of 5Under Grandma's age (in Just Math)
Posted on 2014-08-20 (8 Comments)
Some Thoughts I must be missing something by Charlie (2014-08-20 16:20:37)
Difficulty: 2 of 5Under Square Cut (in Shapes)
Posted on 2014-08-20 (2 Comments)
Solution exploded by Charlie (2014-08-20 12:58:18)
Difficulty: 3 of 5Under Pandigital Ponder II (in Just Math)
Posted on 2014-08-19 (3 Comments)
Solution computer solution by Charlie (2014-08-19 18:18:00)
Difficulty: 3 of 5Under Test #4 (in General)
Posted on 2014-08-19 (1 Comments)
Solution computer solution by Charlie (2014-08-19 12:20:04)
Difficulty: 3 of 5Under Quaint Quadruplets (in Just Math)
Posted on 2014-08-18 (3 Comments)
Some Thoughts re: software solution--similar puzzle solution by Charlie (2014-08-19 10:03:12)
Solution software solution by Charlie (2014-08-18 20:58:28)
Difficulty: 2 of 5Under Crossnumber IV (in General)
Posted on 2014-08-18 (3 Comments)
Some Thoughts attempt without leading zeroes by Charlie (2014-08-18 12:24:28)
Difficulty: 3 of 5Under Three subsets (in Just Math)
Posted on 2014-08-15 (13 Comments)
Solution final (?) revision by Charlie (2014-08-16 10:41:22)
re(2): solution -- now for real?...count again... by Charlie (2014-08-16 00:09:04)
another try by Charlie (2014-08-16 00:07:16)
solution -- now for real? by Charlie (2014-08-15 17:07:08)
re(2): computer solution by Charlie (2014-08-15 16:32:20)
computer solution by Charlie (2014-08-15 13:06:09)
Difficulty: 3 of 5Under Cutting corners. (in Shapes)
Posted on 2014-08-14 (5 Comments)
Solution re(2): what is wanted? by Charlie (2014-08-15 10:07:19)
Some Thoughts re: what is wanted? by Charlie (2014-08-14 16:41:17)
Some Thoughts what is wanted? by Charlie (2014-08-14 16:34:12)
Difficulty: 3 of 5Under Pandigital Ponder (in Just Math)
Posted on 2014-08-13 (1 Comments)
Solution computer solutions by Charlie (2014-08-13 15:50:53)
Difficulty: 3 of 5Under Some Triangles Sum 2014 (in Just Math)
Posted on 2014-08-12 (5 Comments)
Question re: Possible Solution by Charlie (2014-08-12 17:24:03)
Solution computer solution by Charlie (2014-08-12 17:10:24)
Difficulty: 3 of 5Under Octahedron Vertex Ponder (in Probability)
Posted on 2014-08-12 (1 Comments)
Solution computer solution by Charlie (2014-08-12 11:41:39)
Difficulty: 3 of 5Under Fraction Sum Satisfaction (in Just Math)
Posted on 2014-08-09 (3 Comments)
Solution computer solutions by Charlie (2014-08-09 13:16:49)
re: 5 answers by Charlie (2014-08-09 13:14:38)
Difficulty: 3 of 5Under Guessing ages (in Tricks)
Posted on 2014-08-08 (2 Comments)
Solution solution by Charlie (2014-08-08 13:14:29)
Difficulty: 3 of 5Under Pair Ponder (in Probability)
Posted on 2014-08-07 (2 Comments)
Some Thoughts simulation verification by Charlie (2014-08-07 13:29:43)
Solution solution by Charlie (2014-08-07 12:22:36)
Difficulty: 2 of 5Under Find a Frenzy Fibo (in Numbers)
Posted on 2014-08-06 (2 Comments)
Some Thoughts For a similar problem by Charlie (2014-08-06 11:22:46)
Difficulty: 3 of 5Under Done? No need? ...UNDO! (in Word Problems)
Posted on 2014-08-05 (4 Comments)
Solution computer solution -- no definitions by Charlie (2014-08-05 13:29:27)
Difficulty: 3 of 5Under Test #2 (in General)
Posted on 2014-08-04 (1 Comments)
Solution computer solution by Charlie (2014-08-04 17:43:24)
Difficulty: 3 of 5Under Palindrome Ponder (in Just Math)
Posted on 2014-08-04 (1 Comments)
Solution solution by Charlie (2014-08-04 13:09:37)
Difficulty: 3 of 5Under Sixes and Sevens (in Just Math)
Posted on 2014-08-02 (4 Comments)
Solution computer solution by Charlie (2014-08-02 14:26:11)
Difficulty: 3 of 5Under Log Divisor Sum (in Just Math)
Posted on 2014-08-01 (2 Comments)
Solution computer solution by Charlie (2014-08-01 12:36:02)
Difficulty: 3 of 5Under Easy count (in Just Math)
Posted on 2014-07-29 (5 Comments)
re: Solution by Charlie (2014-07-30 09:57:26)
Solution computer assisted solution by Charlie (2014-07-29 14:38:40)
Difficulty: 3 of 5Under Test #1 (in Numbers)
Posted on 2014-07-29 (2 Comments)
Solution computer assisted solution by Charlie (2014-07-29 11:55:29)
Difficulty: 2 of 5Under Triangle Texture (in Shapes)
Posted on 2014-07-28 (2 Comments)
re: My guess by Charlie (2014-07-28 17:33:02)
Difficulty: 3 of 5Under One of a kind (in Just Math)
Posted on 2014-07-27 (3 Comments)
re(2): contradictions? Yes, Sir by Charlie (2014-07-28 09:56:37)
Solution contradictions? by Charlie (2014-07-27 19:10:51)
Difficulty: 3 of 5Under The decisive straw (in Probability)
Posted on 2014-07-25 (6 Comments)
Some Thoughts computer exploration--heuristic approximation by Charlie (2014-07-25 14:06:27)
Difficulty: 3 of 5Under Testy Triplet Treat II (in Just Math)
Posted on 2014-07-25 (4 Comments)
Solution solution by Charlie (2014-07-25 12:41:16)
Difficulty: 3 of 5Under Choose-Product Conclusion (in Just Math)
Posted on 2014-07-23 (1 Comments)
Some Thoughts computer exploration (possible spoiler) by Charlie (2014-07-23 15:32:03)
Difficulty: 3 of 5Under Last digit counts (in Numbers)
Posted on 2014-07-23 (1 Comments)
Solution computer solution by Charlie (2014-07-23 14:30:25)
Difficulty: 3 of 5Under Reverse Rigor II (in Just Math)
Posted on 2014-07-22 (4 Comments)
Solution re(2): possible computer solution by Charlie (2014-07-22 13:43:14)
Some Thoughts possible computer solution by Charlie (2014-07-22 11:58:31)
Difficulty: 3 of 5Under Quiz Quandary III (in Logic)
Posted on 2014-07-15 (8 Comments)
Solution ignore previous post: solution correced by Charlie (2014-07-17 13:14:29)
Some Thoughts computer solution by Charlie (2014-07-17 12:33:20)
Difficulty: 3 of 5Under Sum Power Digit Determination (in Just Math)
Posted on 2014-07-12 (4 Comments)
Solution computer solution by Charlie (2014-07-12 12:30:34)
Difficulty: 3 of 5Under A periodical fraction (in Numbers)
Posted on 2014-07-11 (3 Comments)
Solution computer solution by Charlie (2014-07-11 13:38:40)
Difficulty: 3 of 5Under Cinq Confusion (in Shapes)
Posted on 2014-07-10 (2 Comments)
Solution computer solution by Charlie (2014-07-10 11:55:08)
Difficulty: 3 of 5Under 3 features (in Numbers)
Posted on 2014-07-08 (1 Comments)
Solution computer solution by Charlie (2014-07-08 20:32:07)
Difficulty: 3 of 5Under Mean Muse II (in Just Math)
Posted on 2014-07-06 (1 Comments)
Solution computer solution by Charlie (2014-07-07 13:27:19)
Difficulty: 3 of 5Under Go on, it is easy (in General)
Posted on 2014-07-05 (1 Comments)
Solution solution by Charlie (2014-07-05 14:37:00)
Difficulty: 3 of 5Under An equation (in Just Math)
Posted on 2014-07-03 (5 Comments)
Some Thoughts computer exploration by Charlie (2014-07-04 11:51:38)
Difficulty: 2 of 5Under Only one basic solution (in Just Math)
Posted on 2014-07-02 (2 Comments)
Solution computer solutions by Charlie (2014-07-02 12:33:17)
Difficulty: 2 of 5Under Arctan Appraisal (in Just Math)
Posted on 2014-07-01 (2 Comments)
Some Thoughts computer timing by Charlie (2014-07-01 13:06:54)
Difficulty: 3 of 5Under End and Begin II (in Word Problems)
Posted on 2014-06-30 (6 Comments)
Some Thoughts A start by Charlie (2014-06-30 11:01:27)
Difficulty: 3 of 5Under Some dinner! (in Cryptography)
Posted on 2014-06-29 (2 Comments)
To avoid food poisoning... by Charlie (2014-06-29 12:50:40)
Difficulty: 3 of 5Under Six Term Settlement (in Just Math)
Posted on 2014-06-26 (3 Comments)
Solution computer solutions by Charlie (2014-06-26 15:25:55)
Difficulty: 4 of 5Under scitemahpla II (in Word Problems)
Posted on 2014-06-25 (5 Comments)
Solution re: solution by Charlie (2014-06-26 12:56:58)
Solution solution by Charlie (2014-06-25 12:56:11)
Difficulty: 3 of 5Under An enchanted coin (in Probability)
Posted on 2014-06-24 (3 Comments)
Solution possible solution by Charlie (2014-06-24 15:23:52)
Difficulty: 3 of 5Under Smarandache Settlement (in Just Math)
Posted on 2014-06-24 (1 Comments)
Solution computer aided solution by Charlie (2014-06-24 12:58:06)
Difficulty: 3 of 5Under 2+2=4 is true (in Just Math)
Posted on 2014-06-22 (2 Comments)
Solution computer solutions by Charlie (2014-06-22 13:07:40)
Difficulty: 3 of 5Under Minimum Value Muse (in Just Math)
Posted on 2014-06-20 (3 Comments)
Solution computer solution by Charlie (2014-06-20 12:51:59)
Difficulty: 2 of 5Under Diagram Dilemma (in Just Math)
Posted on 2014-06-19 (1 Comments)
Solution solution by Charlie (2014-06-19 15:26:15)
Difficulty: 3 of 5Under A tall tower (in Geometry)
Posted on 2014-06-18 (6 Comments)
Question re: Solution - Spoiler by Charlie (2014-06-19 10:03:56)
Solution solution by Charlie (2014-06-19 09:57:57)
Difficulty: 3 of 5Under Arithmetic Grid II (in Just Math)
Posted on 2014-06-12 (2 Comments)
Solution The program method by Charlie (2014-06-12 23:44:27)
Difficulty: 3 of 5Under Three Product Tease (in Just Math)
Posted on 2014-06-12 (2 Comments)
Solution numbers without proof of completeness by Charlie (2014-06-12 11:37:50)
Difficulty: 3 of 5Under Ninety-Nine Nuance (in Just Math)
Posted on 2014-06-11 (3 Comments)
My path to the wrong answer--not a solution by Charlie (2014-06-11 14:55:07)
Difficulty: 3 of 5Under Integer Illation (in Logic)
Posted on 2014-06-10 (4 Comments)
Solution computer solution by Charlie (2014-06-10 15:18:45)
Difficulty: 3 of 5Under The mad hatter (in Word Problems)
Posted on 2014-06-09 (5 Comments)
Solution 8-letter words by Charlie (2014-06-09 22:09:03)
Solution re: 7-letter words from program (spoilers) -- continued by Charlie (2014-06-09 22:05:38)
Solution 7-letter words from program (spoilers) by Charlie (2014-06-09 22:04:21)
computer program by Charlie (2014-06-09 22:02:42)
Difficulty: 4 of 5Under Yankee dollar (in Just Math)
Posted on 2014-06-06 (9 Comments)
Solution computer aided solution by Charlie (2014-06-06 16:54:21)
Difficulty: 3 of 5Under Four Digit Trial (in Just Math)
Posted on 2014-06-05 (3 Comments)
Solution computer solution by Charlie (2014-06-05 16:41:56)
Difficulty: 2 of 5Under 4 ways (in Sequences)
Posted on 2014-06-04 (6 Comments)
Solution computer solution by Charlie (2014-06-04 18:02:26)
Difficulty: 2 of 5Under Elementary is easy (in Sequences)
Posted on 2014-06-04 (5 Comments)
Solution answers (spoilers) by Charlie (2014-06-04 13:45:03)
Difficulty: 3 of 5Under Sum Settlement (in Just Math)
Posted on 2014-06-03 (4 Comments)
Solution re: Possible solution -- agreed by Charlie (2014-06-03 15:36:15)
Difficulty: 2 of 5Under Fuel Feat (in Just Math)
Posted on 2014-06-03 (4 Comments)
re(3): Solution by Charlie (2014-06-03 13:19:40)
Solution re: Solution by Charlie (2014-06-03 12:22:29)
Difficulty: 3 of 5Under Arithmetic Grid (in Just Math)
Posted on 2014-05-30 (1 Comments)
Solution computer solution by Charlie (2014-05-30 12:01:48)
Difficulty: 2 of 5Under The pandigital student (in Cryptography)
Posted on 2014-05-29 (3 Comments)
re: it takes two to 504go.. by Charlie (2014-06-02 10:26:38)
If the 8 and the 4 were the same... by Charlie (2014-05-29 11:28:13)
Difficulty: 3 of 5Under Inverse Square Sum (in Just Math)
Posted on 2014-05-28 (5 Comments)
re(3): Do i err ?? by Charlie (2014-05-29 09:35:11)
re: Do i err ?? by Charlie (2014-05-28 13:34:18)
Difficulty: 4 of 5Under Money Division Muse (in Just Math)
Posted on 2014-05-27 (4 Comments)
re: So close yet so far? by Charlie (2014-05-27 23:36:45)
Solution computer solution by Charlie (2014-05-27 15:57:58)
Difficulty: 3 of 5Under Representation Initiation (in Just Math)
Posted on 2014-05-26 (3 Comments)
re: Simpler computer solution by Charlie (2014-05-27 13:06:02)
Solution computer solution by Charlie (2014-05-26 16:47:35)
Difficulty: 3 of 5Under Floor Limit (in Calculus)
Posted on 2014-05-26 (1 Comments)
Solution solution by Charlie (2014-05-26 13:21:08)
Difficulty: 3 of 5Under Eight Embodiment (in Just Math)
Posted on 2014-05-25 (6 Comments)
Solution computer solution by Charlie (2014-05-25 14:15:40)
Difficulty: 2 of 5Under Year Yearn (in General)
Posted on 2014-05-23 (6 Comments)
Solution All except (v) by Charlie (2014-05-23 10:39:46)
Difficulty: 3 of 5Under Harmonic Sequence Settlement (in Just Math)
Posted on 2014-05-22 (3 Comments)
Solution solution with computer code and derivation by Charlie (2014-05-22 16:34:42)
Difficulty: 4 of 5Under Why Haydn ? (in Numbers)
Posted on 2014-05-21 (2 Comments)
Solution computer solution by Charlie (2014-05-21 16:19:59)
Difficulty: 3 of 5Under Array Assignment (in Just Math)
Posted on 2014-05-20 (2 Comments)
Solution Taking into consideration (ii) by Charlie (2014-05-20 15:46:25)
Difficulty: 3 of 5Under Five Friends (in Logic)
Posted on 2014-05-19 (2 Comments)
Solution solution by Charlie (2014-05-19 11:03:00)
Difficulty: 3 of 5Under Side Length Settlement (in Shapes)
Posted on 2014-05-18 (3 Comments)
Solution numerically from Geometers' Sketchpad by Charlie (2014-05-18 23:54:26)
Difficulty: 3 of 5Under Guessing Game (in Numbers)
Posted on 2014-05-16 (18 Comments)
Some Thoughts rational play for the highest integral K allowing play in part b by Charlie (2014-05-18 13:16:04)
Solution Repaired VB program agrees with Steve's answer to part b by Charlie (2014-05-18 12:06:44)
re(3): different part b solution (VB program) by Charlie (2014-05-18 01:13:25)
re: different part b solution (VB program) by Charlie (2014-05-17 16:43:29)
Solution different part b solution (VB program) by Charlie (2014-05-17 16:15:35)
Solution part a solution by Charlie (2014-05-17 01:35:39)
Difficulty: 2 of 5Under The highest prime (in Numbers)
Posted on 2014-05-16 (8 Comments)
Solution my computer solution -- concatenation assumed by Charlie (2014-05-16 12:49:52)
Difficulty: 3 of 5Under Expected of each (in Probability)
Posted on 2014-05-15 (3 Comments)
Solution computer simulation by Charlie (2014-05-15 16:35:46)
Difficulty: 3 of 5Under Attack Assay (in Probability)
Posted on 2014-05-14 (3 Comments)
Solution solution by Charlie (2014-05-14 12:56:47)
Difficulty: 3 of 5Under Quiz Score Settlement (in Liars and Knights)
Posted on 2014-05-13 (5 Comments)
Some Thoughts The way I look at it by Charlie (2014-05-13 11:15:12)
Difficulty: 3 of 5Under Repdigit Rigor (in Just Math)
Posted on 2014-05-11 (2 Comments)
Some Thoughts computer exploration by Charlie (2014-05-11 16:07:53)
Difficulty: 3 of 5Under Pandigital concatenations (in Numbers)
Posted on 2014-05-10 (1 Comments)
Solution computer solutions by Charlie (2014-05-10 15:55:51)
Difficulty: 3 of 5Under Not in every dictionary (in Cryptography)
Posted on 2014-05-09 (3 Comments)
one for Wikipedia by Charlie (2014-05-09 15:33:01)
Difficulty: 3 of 5Under The Ten Statements II (in Logic)
Posted on 2014-05-08 (7 Comments)
re(2): Solution by Charlie (2014-05-10 10:15:00)
Solution re(2): Solution by Charlie (2014-05-09 00:03:11)
Difficulty: 3 of 5Under Baby Blue (in Probability)
Posted on 2014-05-08 (11 Comments)
re: ....hesitating... by Charlie (2014-05-09 09:44:05)
re: answer by Charlie (2014-05-08 10:57:43)
Solution solution by Charlie (2014-05-08 10:56:15)
Difficulty: 2 of 5Under Big spenders (in Cryptography)
Posted on 2014-05-07 (3 Comments)
re: Solution, with a possible correction by Charlie (2014-05-07 14:53:18)
Difficulty: 3 of 5Under Synonym Surveillance (in Word Problems)
Posted on 2014-05-06 (3 Comments)
Solution computer solutions by Charlie (2014-05-06 14:51:22)
Difficulty: 3 of 5Under Mobile Phone Muse (in Logic)
Posted on 2014-05-05 (2 Comments)
Solution computer solutions by Charlie (2014-05-05 13:48:11)
Difficulty: 4 of 5Under Scitemahpla (in General)
Posted on 2014-05-03 (16 Comments)
re(3): att Charlie.....just typo .... by Charlie (2014-05-06 09:43:32)
re: att Charlie by Charlie (2014-05-05 22:21:46)
Solution All that my dictionary can provide by Charlie (2014-05-05 16:29:06)
Solution All that my dictionary can provide by Charlie (2014-05-05 16:29:02)
re(5): hint.....PARTIAL SPOILER by Charlie (2014-05-05 09:56:29)
re(5): hint.....PARTIAL SPOILER by Charlie (2014-05-05 09:49:04)
re(3): hint.....PARTIAL SPOILER by Charlie (2014-05-05 00:10:33)
Solution re: hint.....PARTIAL SPOILER by Charlie (2014-05-04 11:06:16)
Difficulty: 2 of 5Under Weird numbers (in Numbers)
Posted on 2014-05-02 (2 Comments)
Solution computer solution by Charlie (2014-05-02 16:50:42)
Difficulty: 3 of 5Under Powerful Divisor (in Just Math)
Posted on 2014-05-01 (8 Comments)
uh oh by Charlie (2014-05-01 16:42:57)
re: more examples by Charlie (2014-05-01 16:37:49)
Some Thoughts more examples by Charlie (2014-05-01 16:35:40)
Some Thoughts some examples by Charlie (2014-05-01 16:28:34)
Difficulty: 4 of 5Under Without you (in Numbers)
Posted on 2014-04-30 (2 Comments)
Solution computer solution by Charlie (2014-04-30 16:33:40)
Difficulty: 3 of 5Under Making a Multiple of Four (in Numbers)
Posted on 2014-04-30 (6 Comments)
Some Thoughts part 2 simulation by Charlie (2014-04-30 14:38:53)
re: Or maybe I'm simple (part I spoiler) by Charlie (2014-04-30 12:42:26)
Difficulty: 2 of 5Under The end of the line (in Cryptography)
Posted on 2014-04-29 (5 Comments)
Solution From my cryptogram dictionary by Charlie (2014-04-29 11:12:34)
Difficulty: 1 of 5Under I / O resolved (in Logic)
Posted on 2014-04-28 (4 Comments)
going farther by Charlie (2014-04-29 10:03:38)
Difficulty: 3 of 5Under Inscribed Circle (in Shapes)
Posted on 2014-04-27 (2 Comments)
Solution GSP method by Charlie (2014-04-27 15:52:02)
Difficulty: 1 of 5Under 5 Digit Number III (in Just Math)
Posted on 2014-04-22 (3 Comments)
Solution Proof by Charlie (2014-04-22 13:28:47)
Difficulty: 4 of 5Under Limiting Ratio II (in Calculus)
Posted on 2014-04-21 (1 Comments)
Solution the value numerically derived (spoiler) by Charlie (2014-04-21 13:46:49)
Difficulty: 2 of 5Under Trivia (in Numbers)
Posted on 2014-04-21 (7 Comments)
Solution alternative answer by Charlie (2014-04-21 12:07:25)
Difficulty: 3 of 5Under Set Theory (in General)
Posted on 2014-04-19 (3 Comments)
Some Thoughts re: attempt at the rest by Charlie (2014-04-19 14:49:15)
Some Thoughts attempt at the rest by Charlie (2014-04-19 11:01:51)
Some Thoughts right off the bat by Charlie (2014-04-19 09:39:42)
Difficulty: 2 of 5Under Neighbors (in Numbers)
Posted on 2014-04-18 (8 Comments)
re(2): computer solution by Charlie (2014-04-18 22:14:13)
Solution computer solution by Charlie (2014-04-18 13:02:09)
Difficulty: 4 of 5Under No way to win (in General)
Posted on 2014-04-17 (4 Comments)
re(2): computer solution for one of the two - att Charlie by Charlie (2014-04-19 09:27:41)
Solution both solutions now by Charlie (2014-04-19 09:14:38)
Solution computer solution for one of the two by Charlie (2014-04-19 01:13:13)
Difficulty: 3 of 5Under Mod 3 alphametics (in Just Math)
Posted on 2014-04-15 (2 Comments)
Solution In Basic code by Charlie (2014-04-15 16:21:51)
Difficulty: 2 of 5Under My phone is 2543663 (in Probability)
Posted on 2014-04-15 (5 Comments)
re: Two different exact answers by Charlie (2014-04-15 23:47:38)
Solution solution by Charlie (2014-04-15 12:49:18)
Difficulty: 4 of 5Under Pseudo-FIBO (in Sequences)
Posted on 2014-04-14 (5 Comments)
Solution computer solution part b by Charlie (2014-04-14 16:06:52)
Difficulty: 3 of 5Under Question Quandary (in Logic)
Posted on 2014-04-14 (2 Comments)
Solution computer solution--VB 5.0 by Charlie (2014-04-14 12:33:12)
Difficulty: 4 of 5Under The right subset (in Word Problems)
Posted on 2014-04-13 (1 Comments)
Some Thoughts computer exploration--words only; no phrases by Charlie (2014-04-13 13:02:11)
Difficulty: 3 of 5Under Upside down (OEIS A045573) (in Numbers)
Posted on 2014-04-11 (6 Comments)
re: Direct Basic solution by Charlie (2014-04-12 09:35:09)
Solution computer solution by Charlie (2014-04-11 15:47:31)
Difficulty: 3 of 5Under Four Cards (in Logic)
Posted on 2014-04-10 (2 Comments)
Solution the computer method by Charlie (2014-04-10 14:58:10)
Difficulty: 2 of 5Under Integer Divisibility Dilemma (in Just Math)
Posted on 2014-04-10 (6 Comments)
Some Thoughts Any with sum of x and y under 10000--no proof of completeness by Charlie (2014-04-10 11:58:58)
Difficulty: 3 of 5Under Family Murder Muse (in Logic)
Posted on 2014-04-09 (4 Comments)
Solution computer solution -- new computer by Charlie (2014-04-09 14:40:09)
Difficulty: 1 of 5Under A Quicky III (in Numbers)
Posted on 2014-04-09 (9 Comments)
re: How many are divisible by 1? by Charlie (2014-04-09 12:46:01)
Solution computer solution by Charlie (2014-04-09 12:35:01)
Difficulty: 3 of 5Under Consecutive Trio (in Just Math)
Posted on 2014-04-08 (3 Comments)
re: ANSWERS by Charlie (2014-04-08 16:38:20)
Solution computer solution by Charlie (2014-04-08 16:37:41)
Difficulty: 2 of 5Under No-primes sequence (in Numbers)
Posted on 2014-04-07 (1 Comments)
Solution computer solution by Charlie (2014-04-07 13:46:22)
Difficulty: 3 of 5Under Positively Palindromic (in Just Math)
Posted on 2014-04-06 (2 Comments)
Solution solution by Charlie (2014-04-06 20:50:04)
Difficulty: 3 of 5Under Fold Ratio (in Shapes)
Posted on 2014-04-05 (2 Comments)
Solution via Geometers' Sketchpad by Charlie (2014-04-06 01:04:18)
Difficulty: 1 of 5Under A Quicky II (in Numbers)
Posted on 2014-04-03 (7 Comments)
re(3): Clarification? by Charlie (2014-04-03 11:45:01)
Difficulty: 3 of 5Under Fold Judgement II (in Shapes)
Posted on 2014-04-01 (6 Comments)
Solution re: different value by Charlie (2014-04-01 22:44:54)
Solution Geometers' Sketchpad Solution by Charlie (2014-04-01 15:29:38)
re: Full solution by Charlie (2014-04-01 15:27:18)
Difficulty: 4 of 5Under Ternary train (in Just Math)
Posted on 2014-03-28 (3 Comments)
Solution computer solution by Charlie (2014-03-28 14:26:02)
Difficulty: 2 of 5Under In or out? (in Probability)
Posted on 2014-03-28 (2 Comments)
Solution very, very, very close to ... by Charlie (2014-03-28 10:58:30)
Difficulty: 4 of 5Under Harmless? (in General)
Posted on 2014-03-26 (2 Comments)
Solution computer solution by Charlie (2014-03-26 21:16:50)
Difficulty: 3 of 5Under Same Six Digits (in Just Math)
Posted on 2014-03-26 (6 Comments)
Solution program solution by Charlie (2014-03-26 10:59:32)
Difficulty: 4 of 5Under Words count (in Numbers)
Posted on 2014-03-25 (8 Comments)
re(2): solution to part 1; thoughts on part 2 by Charlie (2014-03-26 08:55:42)
Some Thoughts solution to part 1; thoughts on part 2 by Charlie (2014-03-25 15:41:33)
re(2): Solution by Charlie (2014-03-25 15:39:29)
Difficulty: 2 of 5Under How high? (in Numbers)
Posted on 2014-03-25 (4 Comments)
Solution of course there's brute force by Charlie (2014-03-25 11:06:18)
Difficulty: 3 of 5Under A coded phrase (in General)
Posted on 2014-03-24 (2 Comments)
Solution solution in Basic by Charlie (2014-03-24 14:03:07)
Difficulty: 3 of 5Under In pi at last (in Sequences)
Posted on 2014-03-24 (3 Comments)
Solution solution by Charlie (2014-03-24 10:35:18)
Difficulty: 3 of 5Under Factorial-Square Sum (in Just Math)
Posted on 2014-03-23 (7 Comments)
re: more by Charlie (2014-03-23 10:27:33)
Some Thoughts computer exploration by Charlie (2014-03-23 10:19:54)
Difficulty: 3 of 5Under Simultaneous Settlement IV (in Just Math)
Posted on 2014-03-22 (2 Comments)
Some Thoughts computer exploration by Charlie (2014-03-22 13:17:21)
Difficulty: 3 of 5Under Solution or solutions (in Sequences)
Posted on 2014-03-20 (6 Comments)
re(3): computer evaluation -- sums and products by Charlie (2014-03-21 00:18:08)
re(2): computer evaluation -- sums and products by Charlie (2014-03-20 23:06:48)
Some Thoughts computer evaluation by Charlie (2014-03-20 15:34:49)
Difficulty: 3 of 5Under Sum Divisibility Dilemma (in Just Math)
Posted on 2014-03-18 (6 Comments)
Some Thoughts solution by Charlie (2014-03-18 15:10:39)
Difficulty: 3 of 5Under Liars Logic 2 (in Liars and Knights)
Posted on 2014-03-17 (2 Comments)
Solution computer solution by Charlie (2014-03-17 16:25:04)
Difficulty: 3 of 5Under Safe Crack (in Just Math)
Posted on 2014-03-17 (3 Comments)
Solution computer solution by Charlie (2014-03-17 12:06:55)
Difficulty: 3 of 5Under Summing the factorials (in Numbers)
Posted on 2014-03-15 (3 Comments)
re: computer solution by Charlie (2014-03-16 09:12:03)
Difficulty: 3 of 5Under Liars Logic (in Liars and Knights)
Posted on 2014-03-13 (1 Comments)
Solution computer solution by Charlie (2014-03-13 19:18:44)
Difficulty: 3 of 5Under Prime Equation (in Just Math)
Posted on 2014-03-12 (4 Comments)
re: solution by Charlie (2014-03-13 08:36:18)
Some Thoughts computer exploration--no proof by Charlie (2014-03-12 15:14:27)
Difficulty: 4 of 5Under Ady's RH problem (in Logic)
Posted on 2014-03-11 (6 Comments)
for the curious on the question not asked by Charlie (2014-03-11 17:01:47)
Difficulty: 4 of 5Under A permuted multiplication (in Numbers)
Posted on 2014-03-11 (9 Comments)
Solution solution by Charlie (2014-03-11 14:30:36)
Difficulty: 2 of 5Under Pythagorean triangle (in Just Math)
Posted on 2014-03-10 (2 Comments)
Solution The 21 smallest by Charlie (2014-03-10 15:42:35)
Difficulty: 3 of 5Under Some Powers Sum Power (in Just Math)
Posted on 2014-03-09 (3 Comments)
re(2): Near Misses by Charlie (2014-03-09 18:55:13)
Difficulty: 3 of 5Under Chair Cue (in Logic)
Posted on 2014-03-07 (2 Comments)
Solution computer solution by Charlie (2014-03-07 12:50:56)
Difficulty: 3 of 5Under Capital City Conclusion (in General)
Posted on 2014-03-06 (3 Comments)
Solution computer solution by Charlie (2014-03-06 22:35:41)
Difficulty: 3 of 5Under Equilateral Crease II (in Shapes)
Posted on 2014-03-05 (3 Comments)
Some Thoughts GSP approximation by Charlie (2014-03-05 14:50:55)
Difficulty: 2 of 5Under Prime+reversal= prime (in Numbers)
Posted on 2014-03-04 (4 Comments)
Solution UBASIC solution by Charlie (2014-03-04 15:08:19)
Difficulty: 2 of 5Under Card game III (in Logic)
Posted on 2014-03-04 (5 Comments)
Solution solution by Charlie (2014-03-04 12:05:31)
Difficulty: 3 of 5Under Formula Formulation (in Just Math)
Posted on 2014-03-03 (4 Comments)
Some Thoughts re: first few -- larger n by Charlie (2014-03-03 17:27:31)
Some Thoughts first few by Charlie (2014-03-03 17:22:45)
Difficulty: 3 of 5Under Day-knights and night-knights 8 (in Logic)
Posted on 2014-03-03 (4 Comments)
re: W H Y ? by Charlie (2014-03-03 13:17:40)
Solution computer solution by Charlie (2014-03-03 13:17:00)
Difficulty: 3 of 5Under Minimizing Trigo value (in Numbers)
Posted on 2014-03-02 (7 Comments)
re(2): answer by Charlie (2014-03-02 18:45:59)
Difficulty: 3 of 5Under Switching Teams (in Probability)
Posted on 2014-02-28 (8 Comments)
re: n = 4 (spoiler) by Charlie (2014-02-28 17:51:23)
Solution solution by Charlie (2014-02-28 17:22:44)
re: To Charlie. by Charlie (2014-02-28 14:39:21)
Difficulty: 3 of 5Under Minimum Integer (in Just Math)
Posted on 2014-02-28 (4 Comments)
Solution re: Brute force solution by Charlie (2014-02-28 12:39:24)
Difficulty: 3 of 5Under Reverso (in Numbers)
Posted on 2014-02-27 (2 Comments)
Solution computer solution by Charlie (2014-02-27 17:05:19)
Difficulty: 2 of 5Under Special polygon (in Shapes)
Posted on 2014-02-27 (1 Comments)
Solution solution by Charlie (2014-02-27 12:39:52)
Difficulty: 3 of 5Under 8675309 (in Numbers)
Posted on 2014-02-26 (2 Comments)
Solution computer solution by Charlie (2014-02-26 17:07:50)
Difficulty: 3 of 5Under sum Up (in Numbers)
Posted on 2014-02-26 (5 Comments)
Solution probable computer solution by Charlie (2014-02-26 12:58:59)
Difficulty: 3 of 5Under Bullseye II (in Logic)
Posted on 2014-02-25 (3 Comments)
Solution computer solution by Charlie (2014-02-25 15:56:42)
Difficulty: 2 of 5Under All Odds (in Numbers)
Posted on 2014-02-24 (2 Comments)
Solution computer solution by Charlie (2014-02-24 12:34:01)
Difficulty: 3 of 5Under More mean median mode (in Just Math)
Posted on 2014-02-21 (3 Comments)
Solution possible solution by Charlie (2014-02-21 15:49:04)
Difficulty: 2 of 5Under Mean = median (in Just Math)
Posted on 2014-02-20 (4 Comments)
Solution solution by Charlie (2014-02-20 16:07:36)
Difficulty: 3 of 5Under Musicians (in Logic)
Posted on 2014-02-19 (2 Comments)
Some Thoughts Is this it? by Charlie (2014-02-20 18:22:35)
Difficulty: 3 of 5Under Absolute Value Muse (in Just Math)
Posted on 2014-02-19 (4 Comments)
re: General Solution -- Two geometric methods by Charlie (2014-02-20 09:56:14)
Solution solution by Charlie (2014-02-19 14:16:30)
Difficulty: 3 of 5Under Get a good look (in Calculus)
Posted on 2014-02-18 (5 Comments)
Solution solution by Charlie (2014-02-18 17:18:57)
Difficulty: 2 of 5Under Crime Commitment Conclusion III (in Logic)
Posted on 2014-02-18 (3 Comments)
Solution solution by Charlie (2014-02-18 13:38:25)
Difficulty: 3 of 5Under The Equiangular Hexagon (in Geometry)
Posted on 2014-02-17 (1 Comments)
Solution computer solution by Charlie (2014-02-17 17:32:03)
Difficulty: 3 of 5Under Six sets (in Numbers)
Posted on 2014-02-17 (7 Comments)
re(2): computer solution by Charlie (2014-02-18 23:39:08)
Solution computer solution by Charlie (2014-02-17 13:08:09)
Difficulty: 3 of 5Under Red Area (in Shapes)
Posted on 2014-02-16 (1 Comments)
Solution After playing with Geometers' Sketchpad by Charlie (2014-02-16 12:30:22)
Difficulty: 3 of 5Under What did I miss? (in Just Math)
Posted on 2014-02-14 (1 Comments)
Solution computer solution by Charlie (2014-02-15 15:49:39)
Difficulty: 3 of 5Under lcm reflection (in Just Math)
Posted on 2014-02-14 (2 Comments)
Solution computer solution by Charlie (2014-02-14 11:47:49)
Difficulty: 2 of 5Under Will Wangle (in Just Math)
Posted on 2014-02-13 (5 Comments)
Solution solution by Charlie (2014-02-13 12:17:07)
Difficulty: 3 of 5Under Five Hunters (in Logic)
Posted on 2014-02-12 (1 Comments)
Solution computer solution by Charlie (2014-02-13 01:30:14)
Difficulty: 3 of 5Under Largest Overlapped Area (in Shapes)
Posted on 2014-02-11 (3 Comments)
Solution Geometers' Sketchpad results by Charlie (2014-02-11 21:34:08)
Difficulty: 3 of 5Under Remove last three to get cube root (in Numbers)
Posted on 2014-02-11 (3 Comments)
Solution cell phone solution by Charlie (2014-02-11 11:11:21)
Difficulty: 3 of 5Under Quiz Results III (in Logic)
Posted on 2014-02-10 (4 Comments)
Solution computer solution by Charlie (2014-02-10 12:57:57)
Difficulty: 3 of 5Under Alphametic Base Baffle (in Just Math)
Posted on 2014-02-07 (2 Comments)
Solution computer solution by Charlie (2014-02-07 14:13:01)
Difficulty: 3 of 5Under Area Ascertainment (in Shapes)
Posted on 2014-02-06 (1 Comments)
Solution solution by Charlie (2014-02-06 16:36:27)
Difficulty: 3 of 5Under A Skirmish (in Logic)
Posted on 2014-02-05 (3 Comments)
Solution computer solution: 6 scenarios? by Charlie (2014-02-05 12:33:12)
Difficulty: 4 of 5Under My crazy die (in Probability)
Posted on 2014-02-03 (3 Comments)
Solution assuming a triplet must be consecutive within the number by Charlie (2014-02-03 18:47:16)
Difficulty: 3 of 5Under Hockey Score Settlement (in Logic)
Posted on 2014-02-03 (2 Comments)
Solution computer solution by Charlie (2014-02-03 13:22:32)
Difficulty: 2 of 5Under Deduction Problem (in Numbers)
Posted on 2014-01-31 (1 Comments)
Solution computer solution by Charlie (2014-01-31 22:00:07)
Difficulty: 3 of 5Under Four special squares (in Numbers)
Posted on 2014-01-30 (5 Comments)
Solution computer solution by Charlie (2014-01-30 18:51:01)
re: solutions by Charlie (2014-01-30 18:00:37)
Difficulty: 3 of 5Under Suit Settlement (in Logic)
Posted on 2014-01-29 (2 Comments)
Solution computer solution by Charlie (2014-01-29 18:55:46)
Difficulty: 3 of 5Under Potluck Dinner (in Logic)
Posted on 2014-01-27 (1 Comments)
Solution computer solution by Charlie (2014-01-27 21:43:27)
Difficulty: 2 of 5Under N & n (in Just Math)
Posted on 2014-01-27 (7 Comments)
98 results not requiring "distinct" by Charlie (2014-01-27 15:48:49)
re: Looking at my wall by Charlie (2014-01-27 13:36:49)
Solution computer solution for all the solutions by Charlie (2014-01-27 13:33:02)
Difficulty: 2 of 5Under Geography? Spelling? Logic? (in Tricks)
Posted on 2014-01-24 (4 Comments)
Some Thoughts question of identity by Charlie (2014-01-24 12:49:23)
Difficulty: 2 of 5Under An economic reality (in General)
Posted on 2014-01-23 (1 Comments)
Solution computer solution by Charlie (2014-01-23 17:19:20)
Difficulty: 3 of 5Under Restaurant Murder Muse (in Logic)
Posted on 2014-01-23 (3 Comments)
Solution computer solution by Charlie (2014-01-23 11:15:40)
Difficulty: 3 of 5Under Maximizing Matches Model (in Numbers)
Posted on 2014-01-22 (16 Comments)
re(7): restrictions - no spoiler (spoiler added) by Charlie (2014-01-26 10:49:48)
re(3): A start by Charlie (2014-01-23 09:56:50)
Question re: A start by Charlie (2014-01-22 16:01:15)
Some Thoughts My conventional tries by Charlie (2014-01-22 16:00:00)
Difficulty: 3 of 5Under Pumpkins 3 (in Weights and Scales)
Posted on 2014-01-22 (6 Comments)
Solution computer solution by Charlie (2014-01-22 11:38:11)
Difficulty: 3 of 5Under Tribe Travail (in Liars and Knights)
Posted on 2014-01-21 (3 Comments)
Solution computer solution by Charlie (2014-01-21 16:30:58)
Difficulty: 2 of 5Under Probing the prob. (in Probability)
Posted on 2014-01-21 (5 Comments)
re(2): 2nd question first (spoiler) rethink. by Charlie (2014-01-21 12:53:11)
Solution solution by Charlie (2014-01-21 12:51:18)
Difficulty: 3 of 5Under Created after midnight (in General)
Posted on 2014-01-20 (2 Comments)
Solution computer solution (spoiler) by Charlie (2014-01-20 19:15:36)
Difficulty: 3 of 5Under Seven Multiple Muse II (in Just Math)
Posted on 2014-01-17 (1 Comments)
Solution computer solution by Charlie (2014-01-17 12:49:46)
Difficulty: 3 of 5Under Some Squares Sum Year (in Just Math)
Posted on 2014-01-16 (2 Comments)
re: I can program -- same answers in Basic by Charlie (2014-01-16 15:53:34)
Difficulty: 3 of 5Under Impostor Identification (in Logic)
Posted on 2014-01-15 (2 Comments)
Solution computer solution by Charlie (2014-01-15 12:41:58)
Difficulty: 3 of 5Under U * I = $$$ (in General)
Posted on 2014-01-14 (1 Comments)
Solution computer solution by Charlie (2014-01-14 17:49:20)
Difficulty: 2 of 5Under Repeated Digits (in Sequences)
Posted on 2014-01-14 (2 Comments)
Solution computer solution by Charlie (2014-01-14 11:55:29)
Difficulty: 3 of 5Under Numerators sum also (in Numbers)
Posted on 2014-01-13 (1 Comments)
Solution computer solution by Charlie (2014-01-13 17:40:03)
Difficulty: 3 of 5Under Factorial Difference Digits (in Just Math)
Posted on 2014-01-12 (6 Comments)
Solution How it could be done with a calculator (spoiler) by Charlie (2014-01-12 17:23:08)
re(2): A thought by Charlie (2014-01-12 13:52:54)
Hints/Tips A thought by Charlie (2014-01-12 12:19:41)
Difficulty: 3 of 5Under A missing proverb (in General)
Posted on 2014-01-09 (2 Comments)
Solution computer solution by Charlie (2014-01-09 18:47:47)
Difficulty: 2 of 5Under Unusual Crossword Puzzle (in Word Problems)
Posted on 2014-01-09 (5 Comments)
typos in official solution by Charlie (2014-01-18 10:57:29)
Difficulty: 3 of 5Under Witness Wangle (in Logic)
Posted on 2014-01-08 (1 Comments)
Solution computer solution by Charlie (2014-01-08 16:08:35)
Difficulty: 3 of 5Under A quotation (in Numbers)
Posted on 2014-01-07 (2 Comments)
Solution computer solution by Charlie (2014-01-07 18:05:03)
Difficulty: 3 of 5Under Name Determination (in Logic)
Posted on 2014-01-07 (1 Comments)
Solution computer solution by Charlie (2014-01-07 14:47:33)
Difficulty: 3 of 5Under A hidden message (in Cryptography)
Posted on 2014-01-06 (5 Comments)
Some Thoughts re(2): 0919192 etc HINT -re keyword by Charlie (2014-01-07 14:40:06)
Difficulty: 3 of 5Under Palindromic and p-gonal (in Just Math)
Posted on 2014-01-05 (1 Comments)
Solution computer solution by Charlie (2014-01-05 17:47:49)
Difficulty: 2 of 5Under Simple trigo (in Geometry)
Posted on 2014-01-03 (6 Comments)
re: trying to post thru notepad by Charlie (2014-01-05 10:19:27)
re: tan15 FIRST by Charlie (2014-01-03 17:26:09)
Difficulty: 3 of 5Under Primed and Perfect (in Just Math)
Posted on 2014-01-03 (1 Comments)
Solution computer solution by Charlie (2014-01-03 12:47:43)
Difficulty: 3 of 5Under Supreme Subset (in Just Math)
Posted on 2014-01-02 (6 Comments)
Solution re: Blindly crossing possible solution by Charlie (2014-01-02 15:14:37)
Difficulty: 3 of 5Under Pairagrams (in Word Problems)
Posted on 2013-12-31 (1 Comments)
Some Thoughts computer exploration of bonus tasks by Charlie (2013-12-31 11:53:19)
Difficulty: 3 of 5Under Palindromic and prime (in Numbers)
Posted on 2013-12-30 (1 Comments)
Solution computer solution by Charlie (2013-12-30 17:45:16)
Difficulty: 2 of 5Under Boys' names (in Word Problems)
Posted on 2013-12-30 (10 Comments)
re(2): Names by Charlie (2014-01-03 13:27:35)
Solution re: Names by Charlie (2014-01-03 13:23:43)
re: No-brainer by Charlie (2013-12-31 00:02:41)
Solution from a larger data base by Charlie (2013-12-30 15:20:19)
Solution No Subject by Charlie (2013-12-30 12:17:33)
Difficulty: 2 of 5Under Trigonometric product (in Numbers)
Posted on 2013-12-29 (4 Comments)
Solution computer solution by Charlie (2013-12-29 14:56:59)
Some Thoughts computer exploration--table of values by Charlie (2013-12-29 13:26:28)
Difficulty: 3 of 5Under Going Maximum With Harmonic (in Just Math)
Posted on 2013-12-28 (2 Comments)
Solution computer solution by Charlie (2013-12-28 16:00:13)
Difficulty: 3 of 5Under Simultaneous Settlement III (in Just Math)
Posted on 2013-12-27 (1 Comments)
Solution solution without extra challenge (spoiler) by Charlie (2013-12-27 17:29:39)
Difficulty: 3 of 5Under A sum of 3 (in Numbers)
Posted on 2013-12-27 (2 Comments)
re: computer solutions by Charlie (2013-12-27 13:14:13)
Solution computer solutions by Charlie (2013-12-27 12:41:32)
Difficulty: 3 of 5Under Hotel Room Rumination (in Logic)
Posted on 2013-12-26 (5 Comments)
Solution computer solution by Charlie (2013-12-26 16:05:19)
Difficulty: 3 of 5Under A neat trick (in Tricks)
Posted on 2013-12-26 (5 Comments)
re: I would need a calculator (spoiler) by Charlie (2013-12-26 13:34:29)
Difficulty: 2 of 5Under Algebra and Primes (in Numbers)
Posted on 2013-12-25 (3 Comments)
Some Thoughts computer exploration (spoiler) by Charlie (2013-12-25 12:22:06)
Difficulty: 3 of 5Under Tic Tac Toe II (in Probability)
Posted on 2013-12-24 (2 Comments)
verification by simulation by Charlie (2013-12-24 21:45:24)
Solution computer aided solution by Charlie (2013-12-24 20:41:09)
Difficulty: 1 of 5Under Hidden Animals (in General)
Posted on 2013-12-24 (3 Comments)
Solution solution by Charlie (2013-12-24 11:12:03)
Difficulty: 3 of 5Under Seven Multiple Muse (in Just Math)
Posted on 2013-12-23 (1 Comments)
Solution computer solution by Charlie (2013-12-23 23:28:37)
Difficulty: 2 of 5Under Madam Marathon (in Just Math)
Posted on 2013-12-23 (1 Comments)
Solution solution by Charlie (2013-12-23 12:37:42)
Difficulty: 3 of 5Under Divisible By 2475 (in Just Math)
Posted on 2013-12-20 (1 Comments)
Solution non-computer solution by Charlie (2013-12-20 17:32:31)
Difficulty: 3 of 5Under Array Arrangement (in Just Math)
Posted on 2013-12-19 (1 Comments)
Solution computer solution by Charlie (2013-12-19 19:07:41)
Difficulty: 3 of 5Under Algorithm requested (in Algorithms)
Posted on 2013-12-18 (3 Comments)
Some Thoughts a couple of algorithms by Charlie (2013-12-18 13:09:55)
Difficulty: 3 of 5Under Unitary perfect numbers (in Just Math)
Posted on 2013-12-16 (10 Comments)
re(3): just ...correction by Charlie (2013-12-17 10:07:19)
re(3): just look up by SH by Charlie (2013-12-17 10:04:18)
re: just look up - spoiler by Charlie (2013-12-16 16:41:29)
Solution computer solution by Charlie (2013-12-16 16:26:07)
Difficulty: 2 of 5Under Dueling Weathermen (in Probability)
Posted on 2013-12-16 (1 Comments)
Solution Bayes by Charlie (2013-12-16 12:33:04)
Difficulty: 3 of 5Under All 1's (in Numbers)
Posted on 2013-12-14 (3 Comments)
re(2): Divide and conquer (spoiler) & a challenge by Charlie (2013-12-15 10:14:07)
Difficulty: 3 of 5Under Widow Surmise (in Logic)
Posted on 2013-12-12 (5 Comments)
Solution computer solution by Charlie (2013-12-12 17:51:21)
Difficulty: 2 of 5Under Last but not the least (in Numbers)
Posted on 2013-12-12 (8 Comments)
re(4): All things being equal ... (spoiler) by Charlie (2013-12-13 01:54:49)
re(2): All things being equal ... (spoiler) by Charlie (2013-12-12 11:13:20)
Difficulty: 3 of 5Under Profession Pursuit (in Logic)
Posted on 2013-12-11 (4 Comments)
Solution computer solution by Charlie (2013-12-11 16:10:40)
Difficulty: 2 of 5Under Who's asking? (in Word Problems)
Posted on 2013-12-11 (6 Comments)
re(2): I'll play (spoiler) by Charlie (2013-12-13 12:33:30)
Difficulty: 4 of 5Under Square Crossed Sequence (in Sequences)
Posted on 2013-12-09 (3 Comments)
Some Thoughts computer exploration -- no proof of completeness by Charlie (2013-12-09 16:43:04)
Difficulty: 2 of 5Under Two Rectangles (in Geometry)
Posted on 2013-12-09 (2 Comments)
Solution computer solutions by Charlie (2013-12-09 13:28:31)
Difficulty: 4 of 5Under Feet-Inch Transpose (in Weights and Scales)
Posted on 2013-12-06 (7 Comments)
re: Disclaimer by Charlie (2013-12-07 00:09:20)
Solution computer solution by Charlie (2013-12-06 17:05:59)
Difficulty: 3 of 5Under 1998 (in Numbers)
Posted on 2013-12-05 (5 Comments)
re: Just the first -- UBASIC code agrees by Charlie (2013-12-05 15:50:09)
Some Thoughts part 3 using UBASIC by Charlie (2013-12-05 15:46:56)
Some Thoughts part 2? by Charlie (2013-12-05 15:42:00)
Difficulty: 3 of 5Under Logical Choice (in Logic)
Posted on 2013-12-05 (4 Comments)
Solution solution by Charlie (2013-12-05 15:34:39)
re: liars sometimes prosper (spoiler?) by Charlie (2013-12-05 14:38:16)
Difficulty: 3 of 5Under Consecutive Base Baffle (in Just Math)
Posted on 2013-12-04 (4 Comments)
Solution computer solution by Charlie (2013-12-04 17:56:33)
Difficulty: 2 of 5Under APPLE + LEMON = BANANA (in Numbers)
Posted on 2013-12-04 (5 Comments)
re(4): answer - spoiler eddited: no tables by Charlie (2013-12-05 09:45:09)
re: answer - spoiler by Charlie (2013-12-04 13:26:54)
Difficulty: 2 of 5Under My first is in MEAT, but not in FEET (in Tricks)
Posted on 2013-12-03 (1 Comments)
Solution solution by Charlie (2013-12-03 16:13:13)
Difficulty: 3 of 5Under Lively Letters (in Logic)
Posted on 2013-12-02 (8 Comments)
Solution If computers had been allowed, there'd still be room for some logic. by Charlie (2013-12-03 11:28:24)
Difficulty: 3 of 5Under Continued Multiples (in Numbers)
Posted on 2013-11-29 (3 Comments)
Solution computer solution by Charlie (2013-11-29 17:18:15)
Difficulty: 3 of 5Under Quiz Quandary II (in Logic)
Posted on 2013-11-29 (6 Comments)
Solution computer solutions by Charlie (2013-11-29 12:34:03)
Difficulty: 4 of 5Under Pentagon in a Square (in Geometry)
Posted on 2013-11-28 (1 Comments)
Solution solution by Charlie (2013-11-28 13:11:40)
Difficulty: 4 of 5Under Harmonic Harness (in Probability)
Posted on 2013-11-27 (2 Comments)
Solution computer solution and extension, but not the bonus by Charlie (2013-11-27 16:45:02)
Difficulty: 2 of 5Under Hexagonal Palindrome (in Just Math)
Posted on 2013-11-26 (2 Comments)
Solution computer solution by Charlie (2013-11-26 19:42:25)
Difficulty: 2 of 5Under Equal sums on a circle (in General)
Posted on 2013-11-26 (1 Comments)
Solution computer solution by Charlie (2013-11-26 12:13:40)
Difficulty: 3 of 5Under 20 Word Lattice I (in Word Problems)
Posted on 2013-11-25 (3 Comments)
Solution computer solution by Charlie (2013-11-25 17:56:11)
Difficulty: 3 of 5Under Day-knights and night-knights 7 (in Logic)
Posted on 2013-11-25 (1 Comments)
Solution solution by Charlie (2013-11-25 14:01:08)
Difficulty: 3 of 5Under A 6-digit answer (in Numbers)
Posted on 2013-11-24 (2 Comments)
Solution computer solution by Charlie (2013-11-24 13:21:52)
Difficulty: 3 of 5Under Eve & Odd (in Numbers)
Posted on 2013-11-22 (5 Comments)
Solution computer solution by Charlie (2013-11-23 15:22:55)
Difficulty: 3 of 5Under Upon Reflection (in Logic)
Posted on 2013-11-22 (13 Comments)
Some Thoughts Is this it? by Charlie (2013-11-22 12:56:19)
Difficulty: 2 of 5Under Testing Three Students (in Just Math)
Posted on 2013-11-20 (2 Comments)
Solution solution by Charlie (2013-11-20 13:11:37)
Difficulty: 2 of 5Under LCM equation (in Numbers)
Posted on 2013-11-19 (5 Comments)
re(2): Proof by Charlie (2013-11-20 09:46:52)
Solution Proof by Charlie (2013-11-19 18:11:31)
Difficulty: 3 of 5Under 8 dice, 3 questions (in Numbers)
Posted on 2013-11-18 (1 Comments)
Solution computer solutions for (a) and (c) by Charlie (2013-11-18 21:28:31)
Difficulty: 3 of 5Under Embedded Triangles (in Shapes)
Posted on 2013-11-16 (1 Comments)
Some Thoughts playing with GSP by Charlie (2013-11-16 11:39:19)
Difficulty: 3 of 5Under Digital Dilemma (in Just Math)
Posted on 2013-11-15 (7 Comments)
re(2): The last few digits of a smaller number by Charlie (2013-11-17 10:16:04)
Some Thoughts thoughts on part 2 by Charlie (2013-11-15 12:24:35)
Some Thoughts computer-aided solution to part 1 by Charlie (2013-11-15 12:16:03)
Difficulty: 3 of 5Under Define winning strategy (in Games)
Posted on 2013-11-14 (6 Comments)
Solution within the constraints by Charlie (2013-11-15 09:47:57)
re: How to win. by Charlie (2013-11-15 09:41:54)
Difficulty: 2 of 5Under Four Egyptian Fractions (in Numbers)
Posted on 2013-11-13 (6 Comments)
Solution computer solution by Charlie (2013-11-13 16:18:04)
Difficulty: 3 of 5Under Consecutive Additions (in Numbers)
Posted on 2013-11-12 (6 Comments)
re(2): computer solution - wondering by Charlie (2013-11-12 19:51:12)
Solution computer solution by Charlie (2013-11-12 18:52:56)
Difficulty: 2 of 5Under Slippery Supplier (in Weights and Scales)
Posted on 2013-11-12 (6 Comments)
Solution solution. by Charlie (2013-11-12 13:53:16)
Difficulty: 3 of 5Under Finding Good Batteries (in Weights and Scales)
Posted on 2013-11-11 (8 Comments)
re(2): my solution by Charlie (2013-11-12 00:11:51)
Solution my solution by Charlie (2013-11-11 17:27:25)
Difficulty: 1 of 5Under Covert Quantity IV (in Numbers)
Posted on 2013-11-11 (1 Comments)
Solution solution by Charlie (2013-11-11 14:03:17)
Difficulty: 3 of 5Under Hexagon in a square (in Shapes)
Posted on 2013-11-10 (1 Comments)
Solution solution by Charlie (2013-11-10 15:25:21)
Difficulty: 3 of 5Under Two possible sums (in Numbers)
Posted on 2013-11-08 (1 Comments)
Solution computer solution by Charlie (2013-11-08 17:25:13)
Difficulty: 3 of 5Under Some Powers Sum 2008 (in Just Math)
Posted on 2013-11-08 (3 Comments)
Solution re: more results by Charlie (2013-11-08 17:39:58)
Solution computer solution by Charlie (2013-11-08 13:34:46)
Difficulty: 3 of 5Under Dart Discharge (in Logic)
Posted on 2013-11-07 (2 Comments)
Solution computer solution by Charlie (2013-11-07 11:39:56)
Difficulty: 3 of 5Under 8_Primes IV (in Numbers)
Posted on 2013-11-06 (1 Comments)
Solution computer solutions by Charlie (2013-11-06 17:30:35)
Difficulty: 2 of 5Under Word Grids (in Word Problems)
Posted on 2013-11-06 (1 Comments)
Solution Solution by Charlie (2013-11-06 13:00:02)
Difficulty: 2 of 5Under Four Digits (in Numbers)
Posted on 2013-11-05 (4 Comments)
Solution computer solution by Charlie (2013-11-05 13:17:32)
Difficulty: 3 of 5Under Quadratic Quandary (in Just Math)
Posted on 2013-11-04 (6 Comments)
Solution Two real solutions by Charlie (2013-11-06 09:58:00)
Jer seems right; I must have erred somewhere by Charlie (2013-11-04 15:58:22)
Some Thoughts roots by Charlie (2013-11-04 15:53:00)
Difficulty: 2 of 5Under Triangles And Rectangles Pair (in Geometry)
Posted on 2013-11-01 (1 Comments)
Solution computer solution by Charlie (2013-11-01 11:27:22)
Difficulty: 3 of 5Under Fold Judgement (in Shapes)
Posted on 2013-10-30 (1 Comments)
Solution solution by Charlie (2013-10-30 22:33:17)
Difficulty: 3 of 5Under Polycubic surface (in Shapes)
Posted on 2013-10-29 (1 Comments)
Solution possible solution by Charlie (2013-10-29 14:50:06)
Difficulty: 3 of 5Under Slow Cows (in General)
Posted on 2013-10-28 (4 Comments)
Solution solution by Charlie (2013-10-28 13:02:30)
Difficulty: 3 of 5Under Drinking Dwarfs (in Just Math)
Posted on 2013-10-23 (6 Comments)
Hints/Tips towards a solution by Charlie (2013-10-23 14:55:44)
Difficulty: 2 of 5Under Sum of Cubes (in Numbers)
Posted on 2013-10-23 (5 Comments)
Some Thoughts going further with the computer, but still 14 missing by Charlie (2013-10-23 12:55:41)
Some Thoughts re: Computer findings, leaving 45 cases for analytic methods--list continued by Charlie (2013-10-23 12:24:51)
Some Thoughts Computer findings, leaving 45 cases for analytic methods by Charlie (2013-10-23 12:22:42)
Difficulty: 3 of 5Under 8_Primes III (in Numbers)
Posted on 2013-10-21 (1 Comments)
Solution computer solutions by Charlie (2013-10-21 20:21:42)
Difficulty: 2 of 5Under Five by Five (in Numbers)
Posted on 2013-10-21 (2 Comments)
Solution modular solution by Charlie (2013-10-21 13:05:30)
Difficulty: 3 of 5Under Take the right one (in Weights and Scales)
Posted on 2013-10-18 (18 Comments)
re(2): question for Kenny by Charlie (2013-10-19 01:38:08)
Difficulty: 3 of 5Under Geo-alphametic (in General)
Posted on 2013-10-16 (2 Comments)
Solution computer solution by Charlie (2013-10-16 15:45:32)
Difficulty: 3 of 5Under 8_Primes II (in Numbers)
Posted on 2013-10-15 (1 Comments)
Solution computer solution by Charlie (2013-10-15 20:42:09)
Difficulty: 3 of 5Under Reciprocal Equation #5 (in Just Math)
Posted on 2013-10-15 (3 Comments)
Solution computer generated answers without proof by Charlie (2013-10-15 12:41:22)