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Comment Search results for posted by Daniel :
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Difficulty: 2 of 5Under One digit answer (in Numbers)
Posted on 2017-11-08 (3 Comments)
Solution by Daniel (2017-11-08 14:01:48)
Difficulty: 3 of 5Under Does it continue? 5: powers of 2 (in Numbers)
Posted on 2017-09-24 (6 Comments)
solution by Daniel (2017-09-24 13:12:51)
Difficulty: 3 of 5Under Make It Even Again (in Probability)
Posted on 2017-06-20 (4 Comments)
analytical solution by Daniel (2017-06-20 18:48:19)
Difficulty: 3 of 5Under Pythagoras' corner (in Geometry)
Posted on 2017-06-16 (3 Comments)
solution by Daniel (2017-06-16 11:56:04)
Difficulty: 3 of 5Under Fifty-Fifty Again? (in Probability)
Posted on 2017-06-14 (3 Comments)
re: Solution (spoiler) by Daniel (2017-06-14 14:27:02)
Difficulty: 3 of 5Under Paradox? Not really (in Probability)
Posted on 2017-06-13 (1 Comments)
No Subject by Daniel (2017-06-13 09:19:59)
Difficulty: 3 of 5Under Red vs Black Cuts (in Numbers)
Posted on 2017-06-05 (8 Comments)
re(3): Solution by Daniel (2017-06-05 10:28:01)
re: solution by Daniel (2017-06-05 09:40:27)
re: Solution by Daniel (2017-06-05 09:37:22)
solution by Daniel (2017-06-05 09:26:17)
Difficulty: 3 of 5Under Delian delight (in Geometry)
Posted on 2017-06-04 (3 Comments)
solution by Daniel (2017-06-04 14:27:49)
Difficulty: 2 of 5Under Unbalanced?- No problem (in Weights and Scales)
Posted on 2017-05-30 (7 Comments)
solution by Daniel (2017-05-30 08:58:51)
Difficulty: 4 of 5Under Oleg or Erdös? (in Games)
Posted on 2017-05-26 (8 Comments)
re(3): my solution by Daniel (2017-05-27 09:59:44)
re(2): my solution by Daniel (2017-05-27 09:49:29)
my solution by Daniel (2017-05-26 14:51:54)
Difficulty: 2 of 5Under Four balls (in Probability)
Posted on 2017-05-19 (22 Comments)
re(2): I agree with Brian by Daniel (2017-05-19 23:38:41)
Difficulty: 3 of 5Under Hands off! (in Weights and Scales)
Posted on 2017-05-16 (3 Comments)
thought experiment approach by Daniel (2017-05-16 08:53:31)
Difficulty: 3 of 5Under How much is "?" ? (in Numbers)
Posted on 2017-05-13 (1 Comments)
ugly but works by Daniel (2017-05-13 13:25:31)
Difficulty: 2 of 5Under Strange Summation (in Numbers)
Posted on 2017-05-04 (1 Comments)
solution by Daniel (2017-05-04 08:37:45)
Difficulty: 3 of 5Under Baker to butcher to baker (in Just Math)
Posted on 2017-04-27 (2 Comments)
solution by Daniel (2017-04-27 11:58:56)
Difficulty: 1 of 5Under Pretty primes (in Numbers)
Posted on 2017-04-10 (2 Comments)
solution by Daniel (2017-04-10 14:43:02)
Difficulty: 2 of 5Under POPANASIS (in Word Problems)
Posted on 2017-03-23 (4 Comments)
Massive Search by Daniel (2017-03-24 09:01:15)
Difficulty: 2 of 5Under Elongated Pentagonal Orthocupola's vertices (in Shapes)
Posted on 2017-03-20 (3 Comments)
re(2): solution by Daniel (2017-03-20 13:23:47)
solution by Daniel (2017-03-20 11:21:34)
Difficulty: 4 of 5Under Primes and factors (in Numbers)
Posted on 2017-03-17 (2 Comments)
computer search by Daniel (2017-03-17 10:00:34)
Difficulty: 4 of 5Under A false conjecture (in Numbers)
Posted on 2017-01-27 (7 Comments)
re(2): computer attempt by Daniel (2017-01-29 13:12:03)
Difficulty: 2 of 5Under Proving divisibility (in Just Math)
Posted on 2017-01-08 (2 Comments)
proof by Daniel (2017-01-09 07:42:29)
Difficulty: 2 of 5Under Same Real Roots (in Just Math)
Posted on 2016-12-10 (2 Comments)
solution by Daniel (2016-12-10 09:04:05)
Difficulty: 3 of 5Under Reciprocal Period Poser (in Just Math)
Posted on 2016-10-29 (2 Comments)
solution by Daniel (2016-10-29 09:51:37)
Difficulty: 4 of 5Under Symmetry helps! (in Just Math)
Posted on 2016-10-26 (7 Comments)
re: my short solution by Daniel (2016-10-27 05:29:47)
Difficulty: 2 of 5Under Simultaneous Settlement V (in Just Math)
Posted on 2016-10-24 (2 Comments)
solution by Daniel (2016-10-24 08:15:16)
Difficulty: 3 of 5Under List of triplets (in Just Math)
Posted on 2016-10-21 (4 Comments)
re(3): solution by Daniel (2016-10-21 10:10:05)
re(2): solution by Daniel (2016-10-21 09:42:24)
solution by Daniel (2016-10-21 07:58:47)
Difficulty: 3 of 5Under Dodecahedron Chance Determination (in Probability)
Posted on 2016-10-20 (6 Comments)
re: clarification by Daniel (2016-10-20 14:14:25)
clarification by Daniel (2016-10-20 13:25:30)
Difficulty: 3 of 5Under Why not marry? (in Logic)
Posted on 2016-10-19 (6 Comments)
re: No Subject by Daniel (2016-10-19 21:36:06)
re: Two ways. (Third option) by Daniel (2016-10-19 11:16:36)
Difficulty: 2 of 5Under Prime problem (in Just Math)
Posted on 2016-10-03 (1 Comments)
solution by Daniel (2016-10-04 06:35:52)
Difficulty: 3 of 5Under Summing up (in Sequences)
Posted on 2016-08-17 (2 Comments)
solution by Daniel (2016-08-18 07:01:22)
Difficulty: 2 of 5Under Form 21 n Times II (in Numbers)
Posted on 2016-08-11 (5 Comments)
solution by Daniel (2016-08-11 09:47:46)
Difficulty: 4 of 5Under Mirror multiplication (in Numbers)
Posted on 2016-07-31 (8 Comments)
lots of them by Daniel (2016-07-31 20:59:38)
Difficulty: 3 of 5Under Seventh Term Settlement (in Sequences)
Posted on 2016-07-22 (10 Comments)
re(2): Analytical Solution by Daniel (2016-07-24 06:09:31)
Analytical Solution by Daniel (2016-07-23 06:43:50)
Difficulty: 3 of 5Under Edge problem (in Geometry)
Posted on 2016-05-31 (3 Comments)
solution by Daniel (2016-05-31 12:34:17)
Difficulty: 3 of 5Under A comprehensive list (in Word Problems)
Posted on 2016-05-19 (4 Comments)
re(2): my list by Daniel (2016-05-20 03:10:24)
my list by Daniel (2016-05-19 15:00:08)
Difficulty: 3 of 5Under Cubic and Quadratic Determination (in Just Math)
Posted on 2016-05-14 (3 Comments)
re(2): Possible solution by Daniel (2016-05-16 09:13:02)
Difficulty: 3 of 5Under Divisible by 198 (in Just Math)
Posted on 2016-05-12 (2 Comments)
analytical solution by Daniel (2016-05-12 09:54:54)
Difficulty: 3 of 5Under Real Expression Ratio Resolution (in Just Math)
Posted on 2016-05-08 (1 Comments)
solution by Daniel (2016-05-08 21:34:17)
Difficulty: 3 of 5Under Countable sets (in Just Math)
Posted on 2016-03-15 (8 Comments)
part 2 & 3 by Daniel (2016-03-15 11:44:42)
Difficulty: 3 of 5Under Miles to Kilometers (in General)
Posted on 2016-02-26 (3 Comments)
quick Excel solution by Daniel (2016-02-26 09:50:52)
Difficulty: 3 of 5Under Last term zero (in Sequences)
Posted on 2016-01-28 (3 Comments)
solution by Daniel (2016-01-28 09:23:03)
Difficulty: 3 of 5Under Irrational Decision (in Just Math)
Posted on 2015-11-15 (6 Comments)
most of a general proof by Daniel (2015-11-17 15:26:00)
re(3): N=2 only by Daniel (2015-11-16 20:53:52)
Difficulty: 3 of 5Under Sphere Intersections (in Geometry)
Posted on 2015-11-11 (4 Comments)
analytical solution by Daniel (2015-11-11 14:20:46)
Difficulty: 3 of 5Under Triangular and Square Settlement (in Just Math)
Posted on 2015-10-13 (7 Comments)
re(3): possible solution. //infinitely many ? by Daniel (2015-10-14 07:11:46)
Difficulty: 2 of 5Under Wise and nice (in Word Problems)
Posted on 2015-10-05 (3 Comments)
solution by Daniel (2015-10-05 11:35:06)
Difficulty: 3 of 5Under Some definite results (in Numbers)
Posted on 2015-09-17 (5 Comments)
re: non-analytic solution by Daniel (2015-09-18 00:52:10)
Difficulty: 4 of 5Under 26 letters needed (in Word Problems)
Posted on 2015-07-31 (1 Comments)
solution by Daniel (2015-07-31 12:39:20)
Difficulty: 3 of 5Under No letters (in Cryptography)
Posted on 2015-07-27 (2 Comments)
computer solution by Daniel (2015-07-27 14:04:59)
Difficulty: 2 of 5Under xyz inequality (in Just Math)
Posted on 2015-07-24 (1 Comments)
solution by Daniel (2015-07-24 08:45:54)
Difficulty: 2 of 5Under Nine trolls (in Just Math)
Posted on 2015-07-23 (9 Comments)
computer solution by Daniel (2015-07-23 10:13:56)
Difficulty: 2 of 5Under Pieces of eight (in Just Math)
Posted on 2015-07-15 (2 Comments)
analytical solution by Daniel (2015-07-15 10:36:48)
Difficulty: 2 of 5Under Something is "some night" (in Word Problems)
Posted on 2015-07-13 (1 Comments)
solution by Daniel (2015-07-13 07:45:39)
Difficulty: 4 of 5Under One 1 to Six 6's (in Probability)
Posted on 2015-07-01 (14 Comments)
re: more results (11 and 12) by Daniel (2015-07-04 09:45:05)
more results by Daniel (2015-07-03 21:01:10)
re(5): computer aided solution (lots more) by Daniel (2015-07-03 21:00:09)
Difficulty: 2 of 5Under On his way to fitness (in Just Math)
Posted on 2015-06-15 (10 Comments)
statistical approach by Daniel (2015-06-15 12:51:38)
Difficulty: 2 of 5Under No direct evaluation (in Numbers)
Posted on 2015-06-09 (4 Comments)
re(3): Solution by Daniel (2015-06-09 13:33:51)
re: Solution by Daniel (2015-06-09 09:43:07)
Difficulty: 3 of 5Under Septic Factorization (in Just Math)
Posted on 2015-06-07 (5 Comments)
another approach by Daniel (2015-06-08 11:47:38)
Difficulty: 3 of 5Under Find Points, Maximise Ratio (in Shapes)
Posted on 2015-06-05 (6 Comments)
solution by Daniel (2015-06-05 13:02:15)
Difficulty: 3 of 5Under Near Fermat Formulation (in Just Math)
Posted on 2015-05-11 (4 Comments)
re(2): solution by Daniel (2015-05-12 04:45:21)
solution by Daniel (2015-05-11 13:20:55)
Difficulty: 4 of 5Under Short advice (in Cryptography)
Posted on 2015-05-08 (6 Comments)
re: Misunderstanding by Daniel (2015-05-08 12:28:54)
Difficulty: 3 of 5Under Seventeen divides expression? (in Just Math)
Posted on 2015-04-26 (3 Comments)
solution by Daniel (2015-04-27 11:23:51)
Difficulty: 3 of 5Under Non-empty sets element count (in Just Math)
Posted on 2015-04-13 (5 Comments)
re: Answer only by Daniel (2015-04-13 13:47:57)
solution by Daniel (2015-04-13 13:46:10)
Difficulty: 4 of 5Under Bright light (in Science)
Posted on 2015-04-09 (9 Comments)
my solution by Daniel (2015-04-09 11:36:31)
Difficulty: 2 of 5Under Two Tree Trial (in Word Problems)
Posted on 2015-04-09 (3 Comments)
silly answer by Daniel (2015-04-09 09:06:44)
Difficulty: 2 of 5Under Long-life recipe (in Logic)
Posted on 2015-04-06 (1 Comments)
silly answer by Daniel (2015-04-06 13:59:50)
Difficulty: 1 of 5Under Vive la petite différence! (in Paradoxes)
Posted on 2015-04-06 (3 Comments)
answer...maybe by Daniel (2015-04-06 10:58:03)
Difficulty: 3 of 5Under 123456789 scrambled (in Numbers)
Posted on 2015-03-19 (6 Comments)
re(5): computer solution by Daniel (2015-03-22 04:34:56)
Difficulty: 3 of 5Under Root sum equals integer (in Just Math)
Posted on 2015-03-10 (7 Comments)
re(2): solution & playing around by Daniel (2015-03-10 15:13:01)
Difficulty: 1 of 5Under Cryptajoke III (in Logic)
Posted on 2015-02-23 (2 Comments)
solution by Daniel (2015-02-23 14:41:22)
Difficulty: 3 of 5Under Integer Polynomial Illation (in Just Math)
Posted on 2015-02-22 (1 Comments)
solution by Daniel (2015-02-23 09:20:06)
Difficulty: 2 of 5Under Some special sums (in Numbers)
Posted on 2015-02-05 (4 Comments)
solution by Daniel (2015-02-05 15:11:27)
re: Odd premise (spoiler) new challenge by Daniel (2015-02-05 14:46:07)
Difficulty: 3 of 5Under A symmetric relation (in Just Math)
Posted on 2014-11-19 (5 Comments)
solution by Daniel (2014-11-19 08:28:56)
Difficulty: 2 of 5Under Recruiting Crisis (in Algorithms)
Posted on 2014-10-03 (1 Comments)
solution by Daniel (2014-10-10 12:59:49)
Difficulty: 3 of 5Under Primes vs ones (in Numbers)
Posted on 2014-03-27 (2 Comments)
Proof by Daniel (2014-03-28 01:07:56)
Difficulty: 2 of 5Under Four Egyptian Fractions (in Numbers)
Posted on 2013-11-13 (6 Comments)
re: typos and omissions by Daniel (2013-11-13 13:15:22)
analytical solution by Daniel (2013-11-13 12:07:45)
Difficulty: 3 of 5Under Quadratic Quandary (in Just Math)
Posted on 2013-11-04 (6 Comments)
re: Jer seems right; I must have erred somewhere by Daniel (2013-11-05 21:20:59)
Difficulty: 3 of 5Under Divisor Sum Digits (in Just Math)
Posted on 2013-10-11 (1 Comments)
analytical solution by Daniel (2013-10-12 08:20:26)
Difficulty: 3 of 5Under GCD to product (in Just Math)
Posted on 2013-10-03 (4 Comments)
analytical solution by Daniel (2013-10-03 16:17:54)
Difficulty: 3 of 5Under Repunit Rigor II (in Just Math)
Posted on 2013-10-01 (3 Comments)
upper limit by Daniel (2013-10-02 10:36:11)
Difficulty: 2 of 5Under mistakes (in Numbers)
Posted on 2013-09-27 (2 Comments)
solution by Daniel (2013-09-27 13:29:00)
Difficulty: 3 of 5Under Simultaneous Settlement II (in Just Math)
Posted on 2013-09-26 (3 Comments)
re: solution by Daniel (2013-09-26 15:14:27)
analytical solution by Daniel (2013-09-26 11:28:03)
Difficulty: 2 of 5Under Smallinomial (in Just Math)
Posted on 2013-09-25 (2 Comments)
analytical solution by Daniel (2013-09-25 14:02:20)
Difficulty: 3 of 5Under Rooted to the Floor (in Just Math)
Posted on 2013-09-24 (1 Comments)
anaylitical solution by Daniel (2013-09-25 11:54:01)
Difficulty: 3 of 5Under Perfectly Differentiated (in Just Math)
Posted on 2013-09-21 (1 Comments)
analytical solution by Daniel (2013-09-23 11:14:09)
Difficulty: 1 of 5Under play with digit (in Numbers)
Posted on 2013-09-10 (1 Comments)
solution by Daniel (2013-09-10 10:16:02)
Difficulty: 3 of 5Under Supreme Value Validation (in Just Math)
Posted on 2013-09-08 (3 Comments)
solution by Daniel (2013-09-08 21:42:44)
Difficulty: 1 of 5Under The 1234 Problem (in Numbers)
Posted on 2013-09-05 (1 Comments)
solution by Daniel (2013-09-05 11:19:23)
Difficulty: 2 of 5Under All zeroes solution (in Numbers)
Posted on 2013-09-01 (3 Comments)
solution by Daniel (2013-09-01 21:50:26)
Difficulty: 3 of 5Under The cunning Condition (in Just Math)
Posted on 2013-08-25 (5 Comments)
full solution by Daniel (2013-08-25 18:03:26)
Difficulty: 2 of 5Under Different Gender (in Logic)
Posted on 2013-08-21 (2 Comments)
analytical solution by Daniel (2013-08-21 10:07:25)
Difficulty: 3 of 5Under Root sum or integer? (in Just Math)
Posted on 2013-08-18 (6 Comments)
the hard way by Daniel (2013-08-18 11:18:11)
Difficulty: 3 of 5Under NegaBinary Numbers (in Algorithms)
Posted on 2013-08-14 (2 Comments)
solution by Daniel (2013-08-14 21:20:31)
Difficulty: 2 of 5Under Rectangle to Square (in Geometry)
Posted on 2013-08-13 (9 Comments)
re(3): Full solution by Daniel (2013-08-16 14:50:13)
re: Full solution by Daniel (2013-08-16 10:34:57)
re: Full solution by Daniel (2013-08-15 17:10:36)
Difficulty: 3 of 5Under Sitting on the Fence (in Probability)
Posted on 2013-08-13 (5 Comments)
re(2): solution, different result by Daniel (2013-08-13 14:14:03)
solution by Daniel (2013-08-13 10:27:59)
Difficulty: 2 of 5Under An Elusive Quadratic (in Numbers)
Posted on 2013-08-09 (2 Comments)
found one by Daniel (2013-08-09 22:38:37)
Difficulty: 2 of 5Under Seven - with and without (in Numbers)
Posted on 2013-08-09 (6 Comments)
solution by Daniel (2013-08-09 11:35:30)
Difficulty: 2 of 5Under Not applicable to driving (in Riddles)
Posted on 2013-08-08 (2 Comments)
answer by Daniel (2013-08-08 10:16:06)
Difficulty: 3 of 5Under Geometric Sequence Settlement (in Sequences)
Posted on 2013-08-07 (4 Comments)
solution with proof by Daniel (2013-08-08 10:55:54)
Difficulty: 3 of 5Under Testy Triplet Treat (in Just Math)
Posted on 2013-08-04 (7 Comments)
re(3): results so far, but no proof in sight by Daniel (2013-08-04 15:42:58)
Difficulty: 3 of 5Under Forcing a Polynomial Factor (in Just Math)
Posted on 2013-08-03 (4 Comments)
solution by Daniel (2013-08-03 22:45:59)
Difficulty: 3 of 5Under Non Sloane Surmise (in Sequences)
Posted on 2013-08-02 (4 Comments)
re(2): solution by Daniel (2013-08-03 22:30:58)
solution by Daniel (2013-08-02 23:17:14)
Difficulty: 3 of 5Under Squarely Sorted (in Numbers)
Posted on 2013-07-27 (4 Comments)
answer with proof by Daniel (2013-07-27 11:33:51)
Difficulty: 3 of 5Under A Pleasurable Puzzle (in Just Math)
Posted on 2013-07-26 (1 Comments)
complete solution by Daniel (2013-07-27 14:43:40)
Difficulty: 3 of 5Under Factorials AND Powers (in Numbers)
Posted on 2013-07-11 (2 Comments)
re: solution (exact confirmation) by Daniel (2013-07-11 21:34:09)
Difficulty: 2 of 5Under Just asking (in Just Math)
Posted on 2013-07-03 (1 Comments)
highly precise answer by Daniel (2013-07-03 10:55:22)
Difficulty: 1 of 5Under 222 (in Word Problems)
Posted on 2013-07-02 (11 Comments)
more 2's for me too by Daniel (2013-07-02 11:07:18)
Difficulty: 3 of 5Under The Exclusive Club (in Paradoxes)
Posted on 2013-07-01 (8 Comments)
re(4): solution by Daniel (2013-07-02 05:15:43)
re(3): solution by Daniel (2013-07-01 21:13:55)
solution by Daniel (2013-07-01 18:15:22)
Difficulty: 3 of 5Under Easy Findings (in Numbers)
Posted on 2013-06-26 (3 Comments)
analytical solution by Daniel (2013-06-27 17:00:06)
Difficulty: 4 of 5Under Lion and Tamer (in Logic)
Posted on 2013-06-10 (7 Comments)
full answer by Daniel (2013-06-10 17:50:23)
Difficulty: 2 of 5Under A bee in my hand (in Riddles)
Posted on 2013-05-22 (3 Comments)
answer by Daniel (2013-05-22 11:35:57)
Difficulty: 3 of 5Under Prime Fibonacci numbers (in Numbers)
Posted on 2013-05-03 (3 Comments)
re: Exploration by Daniel (2013-05-04 02:04:09)
Difficulty: 1 of 5Under Liar Logic (in Liars and Knights)
Posted on 2013-04-11 (2 Comments)
Solution by Daniel (2013-04-11 09:55:22)
Difficulty: 4 of 5Under Goldbach revisited (in Numbers)
Posted on 2013-03-15 (2 Comments)
exact answers by Daniel (2013-03-15 13:42:27)
Difficulty: 3 of 5Under Strange Equation (in Just Math)
Posted on 2013-03-11 (10 Comments)
re: Equation by Daniel (2013-03-21 01:15:39)
re: solution by Daniel (2013-03-15 02:02:43)
Difficulty: 3 of 5Under Intriguing Integral Illation (in Calculus)
Posted on 2013-03-02 (6 Comments)
exact solution by Daniel (2013-03-03 01:28:12)
Difficulty: 3 of 5Under Geometric Generalization (in Probability)
Posted on 2013-02-28 (6 Comments)
full solution by Daniel (2013-02-28 13:21:38)
Difficulty: 4 of 5Under Underground occupation (in Cryptography)
Posted on 2013-02-26 (4 Comments)
re(2): Observations....H I N T/ partial spoiler by Daniel (2013-02-27 09:48:34)
Difficulty: 2 of 5Under A little Generalization (in Numbers)
Posted on 2012-12-18 (2 Comments)
Solution solution by Daniel (2012-12-18 11:13:23)
Difficulty: 3 of 5Under Exploring HCNs (in Numbers)
Posted on 2012-10-26 (5 Comments)
Part 3 by Daniel (2012-10-28 07:09:31)
Part 2 by Daniel (2012-10-28 07:02:11)
Part 1 by Daniel (2012-10-28 06:58:03)
Difficulty: 3 of 5Under The Magnificent Eleven (in Numbers)
Posted on 2012-07-07 (3 Comments)
Solution Computer Solution by Daniel (2012-07-07 11:57:03)
Difficulty: 2 of 5Under 682 (in Numbers)
Posted on 2012-04-13 (12 Comments)
another solution by Daniel (2012-04-16 08:36:49)
solution by Daniel (2012-04-14 16:38:04)
Difficulty: 3 of 5Under More about 1729 (in Numbers)
Posted on 2012-01-04 (8 Comments)
re(2): computer solution by Daniel (2012-01-04 14:31:42)
Difficulty: 3 of 5Under Fair play (in Probability)
Posted on 2011-12-30 (3 Comments)
pascal solution by Daniel (2011-12-31 08:28:16)
Difficulty: 3 of 5Under Orthogonal Tangents (in Geometry)
Posted on 2011-11-30 (2 Comments)
solution by Daniel (2011-12-01 10:35:19)
Difficulty: 2 of 5Under Timely determination (in Just Math)
Posted on 2011-11-29 (2 Comments)
re: Hmm by Daniel (2011-11-30 09:45:12)
Difficulty: 5 of 5Under Build one get two free (in Numbers)
Posted on 2011-10-08 (5 Comments)
re(2): first one ( maybe more) by Daniel (2011-10-09 07:47:56)
first one ( maybe more) by Daniel (2011-10-09 04:07:43)
Difficulty: 3 of 5Under Multiply Digits, Get Quadratic (in Just Math)
Posted on 2011-10-05 (2 Comments)
full solution (no computer) by Daniel (2011-10-05 11:09:58)
Difficulty: 2 of 5Under Q: What time is it now, dear R.? (in Just Math)
Posted on 2011-09-19 (9 Comments)
re: solution by Daniel (2011-09-19 15:14:58)
solution by Daniel (2011-09-19 14:48:58)
Difficulty: 2 of 5Under The Scenic Route (in General)
Posted on 2011-09-15 (1 Comments)
full solution by Daniel (2011-09-15 12:15:11)
Difficulty: 3 of 5Under Diophantine quickie II (in Just Math)
Posted on 2011-09-09 (1 Comments)
full solution by Daniel (2011-09-09 10:54:06)
Difficulty: 3 of 5Under Sweet 17 (in Numbers)
Posted on 2011-09-05 (3 Comments)
solution by Daniel (2011-09-05 11:35:33)
Difficulty: 2 of 5Under It is not hard (in Word Problems)
Posted on 2011-08-29 (8 Comments)
Solution solution by Daniel (2011-08-29 19:14:20)
Difficulty: 3 of 5Under Sum of cubes and squares (in Just Math)
Posted on 2011-08-28 (2 Comments)
solution by Daniel (2011-08-28 19:06:43)
Difficulty: 3 of 5Under Icy winter shifting (in Just Math)
Posted on 2011-08-24 (4 Comments)
Solution solution by Daniel (2011-08-24 12:33:27)
Difficulty: 4 of 5Under Math pyramid (in Just Math)
Posted on 2011-08-20 (1 Comments)
Solution solution by Daniel (2011-08-24 12:08:44)
Difficulty: 2 of 5Under Logarithmic Equality (in Just Math)
Posted on 2011-05-29 (1 Comments)
complete solution by Daniel (2011-05-30 10:37:07)
Difficulty: 1 of 5Under Chime spacing. (in Just Math)
Posted on 2011-05-12 (2 Comments)
first shot by Daniel (2011-05-12 13:22:36)
Difficulty: 3 of 5Under Powering up the digits IV (in Numbers)
Posted on 2011-04-21 (2 Comments)
re: solution by Daniel (2012-12-18 15:49:07)
Difficulty: 3 of 5Under Sum (expression) = 10*n (in Just Math)
Posted on 2011-02-22 (5 Comments)
re(3): Possible solution by Daniel (2011-02-23 11:41:08)
Difficulty: 3 of 5Under Pythagoras Unconventional (in Numbers)
Posted on 2011-02-10 (10 Comments)
re(2): one possible choice by Daniel (2011-02-11 10:30:08)
complete list from Mathematica search by Daniel (2011-02-10 14:14:05)
Mathematica search by Daniel (2011-02-10 14:12:27)
Difficulty: 3 of 5Under e^(e^x) (in Calculus)
Posted on 2011-02-08 (5 Comments)
possible solution by Daniel (2011-02-08 15:59:41)
Difficulty: 3 of 5Under Three Term Trial (in Just Math)
Posted on 2011-01-15 (4 Comments)
re: Restating the Problem by Daniel (2011-01-16 05:35:50)
Difficulty: 4 of 5Under I WONDER (in Logic)
Posted on 2011-01-13 (10 Comments)
my solution by Daniel (2011-01-13 12:14:32)
Difficulty: 4 of 5Under Some strings attached (in Just Math)
Posted on 2010-12-19 (2 Comments)
answer for kc=5 by Daniel (2010-12-21 21:15:51)
Difficulty: 3 of 5Under Altered Parabolas (in Shapes)
Posted on 2010-12-01 (2 Comments)
part 2: full solution by Daniel (2010-12-04 03:11:54)
part 1: full solution by Daniel (2010-12-04 02:58:13)
Difficulty: 3 of 5Under Weights that check themselves. (in Weights and Scales)
Posted on 2010-11-23 (6 Comments)
5 weights initial search by Daniel (2010-11-24 05:30:22)
re: solution by Daniel (2010-11-24 05:26:41)
Difficulty: 4 of 5Under Fun Function (in Calculus)
Posted on 2010-11-23 (1 Comments)
full solution by Daniel (2010-11-23 17:46:20)
Difficulty: 2 of 5Under 55th in the list (in Numbers)
Posted on 2010-10-28 (6 Comments)
re(3): solution (zero or not) SPOILER by Daniel (2010-10-29 16:19:46)
Difficulty: 3 of 5Under 5 conditions to get 2 results (in Just Math)
Posted on 2010-10-21 (3 Comments)
pencil & paper solution by Daniel (2010-10-22 02:35:35)
Difficulty: 4 of 5Under Big, super and prime (in Numbers)
Posted on 2010-10-20 (8 Comments)
re: Another method. by Daniel (2010-10-20 12:50:37)
computer solution by Daniel (2010-10-20 12:02:07)
Difficulty: 3 of 5Under Oodles of Factors II (in Numbers)
Posted on 2010-10-11 (7 Comments)
re(2): Part C by Daniel (2010-10-12 11:58:25)
Part C by Daniel (2010-10-11 19:45:39)
re(2): thoughts on part B (confirmation) by Daniel (2010-10-11 19:34:24)
Difficulty: 5 of 5Under Optimal Card Drawing Strategy 2 (in Games)
Posted on 2010-10-02 (5 Comments)
re(3): C = 19, R = 6 by Daniel (2010-10-03 23:34:48)
re: C = 19, R = 6 by Daniel (2010-10-03 09:43:16)
Difficulty: 3 of 5Under No way to run a railroad. (in Numbers)
Posted on 2010-10-01 (5 Comments)
re: extra credit by Daniel (2010-10-02 21:07:19)
extra credit by Daniel (2010-10-02 12:07:02)
computer solution by Daniel (2010-10-02 11:43:01)
Difficulty: 2 of 5Under Fraction and Root (in Just Math)
Posted on 2010-09-30 (1 Comments)
analytical solution by Daniel (2010-09-30 23:55:15)
Difficulty: 3 of 5Under Sum and Square Root Sum (in Just Math)
Posted on 2010-09-25 (3 Comments)
analytical solution by Daniel (2010-09-25 13:36:26)
Difficulty: 2 of 5Under Rationalize by factorials (in Numbers)
Posted on 2010-09-22 (2 Comments)
proof by Daniel (2010-09-22 11:08:19)
Difficulty: 4 of 5Under If....Then... (in Logic)
Posted on 2010-09-21 (4 Comments)
computer solution (with diagnals) by Daniel (2010-09-21 22:03:37)
computer solution (no diagnals) by Daniel (2010-09-21 21:58:47)
Difficulty: 3 of 5Under Two Center Distance (in Geometry)
Posted on 2010-09-18 (3 Comments)
re: Guesstimate by Daniel (2010-09-20 02:44:23)
Difficulty: 4 of 5Under Three circles (in Calculus)
Posted on 2010-09-09 (3 Comments)
re: Another approach (spoiler) by Daniel (2010-09-11 22:37:01)
No Subject by Daniel (2010-09-09 17:34:17)
Difficulty: 2 of 5Under Sum (Squares) = Prime Number (in Just Math)
Posted on 2010-09-09 (2 Comments)
analytical solution by Daniel (2010-09-09 13:09:42)
Difficulty: 3 of 5Under Heiro's Wager (in Numbers)
Posted on 2010-09-08 (3 Comments)
first four by Daniel (2010-09-08 23:01:30)
Difficulty: 4 of 5Under Optimal Card Drawing Strategy (in Games)
Posted on 2010-09-07 (7 Comments)
re(2): a hint by Daniel (2010-09-12 04:53:50)
a hint by Daniel (2010-09-11 12:44:50)
re: Long analysis of a simple case by Daniel (2010-09-08 20:32:53)
Difficulty: 2 of 5Under Tennis,anyone? (in Probability)
Posted on 2010-09-07 (7 Comments)
solution by Daniel (2010-09-07 11:47:01)
Difficulty: 2 of 5Under Never prime! (2) (in Numbers)
Posted on 2010-09-04 (4 Comments)
solution and observations by Daniel (2010-09-04 19:22:49)
Difficulty: 2 of 5Under Factorionids (in Numbers)
Posted on 2010-08-28 (3 Comments)
extended subfactorial by Daniel (2010-08-29 05:08:32)
extended factorial by Daniel (2010-08-29 02:52:05)
Difficulty: 2 of 5Under R&R (in Sequences)
Posted on 2010-08-25 (5 Comments)
shot in the dark by Daniel (2010-08-25 11:49:31)
Difficulty: 3 of 5Under Prime, but not forever (in Sequences)
Posted on 2010-08-12 (1 Comments)
proof by Daniel (2010-08-12 13:42:36)
Difficulty: 2 of 5Under Set of Lines with a Condition (in Just Math)
Posted on 2010-08-11 (1 Comments)
solution by Daniel (2010-08-11 20:08:26)
Difficulty: 4 of 5Under Powerful and consecutive (in Numbers)
Posted on 2010-08-09 (16 Comments)
re: An interesting remark ***** Spoiler by Daniel (2010-08-09 18:16:30)
Difficulty: 2 of 5Under Flying Low (in Numbers)
Posted on 2010-08-05 (5 Comments)
mathematica solution by Daniel (2010-08-05 11:52:53)
Difficulty: 3 of 5Under (x!+1)/(x+1) = prime number (in Probability)
Posted on 2010-07-30 (9 Comments)
search is over by Daniel (2010-07-31 20:29:48)
mathematica solutions (so far) by Daniel (2010-07-30 20:06:11)
Difficulty: 3 of 5Under Tangent Trapezoid (in Geometry)
Posted on 2010-07-28 (1 Comments)
analytical solution by Daniel (2010-07-28 16:26:33)
Difficulty: 3 of 5Under Triangle from Two Lines (in Geometry)
Posted on 2010-07-01 (2 Comments)
first part by Daniel (2010-07-01 12:47:57)
Difficulty: 2 of 5Under Concatenated Numbers and Divisibility (in Numbers)
Posted on 2010-06-29 (7 Comments)
analytical solution by Daniel (2010-06-29 13:55:19)
Difficulty: 2 of 5Under Number = Sum (Digit)*Product (Digit) (in Numbers)
Posted on 2010-06-21 (10 Comments)
re: Solution & thoughts by Daniel (2010-06-21 21:11:59)
Difficulty: 4 of 5Under 129 digits (in Numbers)
Posted on 2010-06-18 (6 Comments)
new interpretation by Daniel (2010-06-18 17:48:00)
some thoughts and solutions by Daniel (2010-06-18 16:55:09)
Difficulty: 2 of 5Under Prime and Divisors Derivation (in Just Math)
Posted on 2010-06-17 (3 Comments)
analytical solution by Daniel (2010-06-17 13:03:40)
Difficulty: 1 of 5Under A Magic Die (in Probability)
Posted on 2010-06-10 (8 Comments)
analytical solution by Daniel (2010-06-10 12:03:08)
Difficulty: 3 of 5Under Exponential Difficulties 3 (in Just Math)
Posted on 2010-06-05 (1 Comments)
analytical solution by Daniel (2010-06-05 23:17:04)
Difficulty: 2 of 5Under 50 - Digit Number II (in Just Math)
Posted on 2010-05-29 (9 Comments)
analytical solution by Daniel (2010-05-29 13:37:30)
Difficulty: 2 of 5Under Iterated Specs (in Just Math)
Posted on 2010-05-28 (4 Comments)
number theory approach by Daniel (2010-05-28 12:26:47)
Difficulty: 4 of 5Under Make it equal (in Numbers)
Posted on 2010-05-26 (7 Comments)
half of it by Daniel (2010-05-26 16:52:29)
Difficulty: 4 of 5Under Odd primes never die (in Numbers)
Posted on 2010-05-20 (11 Comments)
re(2): update MORE DETAILS - not a spoiler by Daniel (2010-05-22 20:36:07)
update by Daniel (2010-05-22 01:19:56)
update by Daniel (2010-05-21 17:54:40)
some solutions (maybe) by Daniel (2010-05-21 13:46:55)
further study by Daniel (2010-05-20 13:22:00)
perhaps some clarification by Daniel (2010-05-20 12:16:40)
Difficulty: 2 of 5Under Sum Squares = 2009 Subtraction (in Just Math)
Posted on 2010-05-09 (3 Comments)
re(2): computer solution -- and computer language speeds by Daniel (2010-05-10 10:29:06)
Difficulty: 3 of 5Under Self-Cardinality (in Numbers)
Posted on 2010-05-07 (5 Comments)
re(3): A possible solution by Daniel (2010-05-08 01:05:47)
re: A possible solution by Daniel (2010-05-07 14:05:34)
Difficulty: 3 of 5Under Wins 2 - wins all (in Probability)
Posted on 2010-05-06 (5 Comments)
analytical solution by Daniel (2010-05-06 12:46:18)
Difficulty: 4 of 5Under 2*P + 2 = Perfect Square? (in Just Math)
Posted on 2010-05-01 (5 Comments)
re(2): a computerized start but no proof and too small a sample size by Daniel (2010-05-03 10:31:08)
Difficulty: 3 of 5Under Sum Square Grid Row & Column ≠ 0 (in Numbers)
Posted on 2010-04-29 (6 Comments)
re: a simple proof by Daniel (2010-04-29 15:29:54)
Difficulty: 3 of 5Under Sum Square Roots ≤ Real Number (in Just Math)
Posted on 2010-04-10 (4 Comments)
analytical solution by Daniel (2010-04-10 19:01:31)
Difficulty: 3 of 5Under Twelve Divisor Trial (in Probability)
Posted on 2010-04-09 (7 Comments)
analytical solution by Daniel (2010-04-09 14:30:21)
Difficulty: 1 of 5Under Limiting Mean part 2 (in Calculus)
Posted on 2010-03-10 (2 Comments)
analytical solutions by Daniel (2010-03-10 11:33:54)
Difficulty: 2 of 5Under Pythagoras knew it!! (in Numbers)
Posted on 2010-03-05 (5 Comments)
re(2): my attempt by Daniel (2010-03-05 20:21:17)
my attempt by Daniel (2010-03-05 17:10:36)
Difficulty: 2 of 5Under Eccentric Integral (in Calculus)
Posted on 2010-02-18 (2 Comments)
analytical solution by Daniel (2010-02-19 12:15:26)
Difficulty: 2 of 5Under Succinct Age Settlement (in Just Math)
Posted on 2010-02-09 (7 Comments)
analytical solution by Daniel (2010-02-09 12:01:26)
Difficulty: 3 of 5Under Drop into the Bucket (in Shapes)
Posted on 2010-02-03 (9 Comments)
solution by Daniel (2010-02-03 12:02:16)
Difficulty: 3 of 5Under PX + 144 = Perfect Square (in Just Math)
Posted on 2010-01-12 (9 Comments)
analytical solution by Daniel (2010-01-12 11:53:50)
Difficulty: 3 of 5Under 15-Digits and Repunit Division (in Numbers)
Posted on 2010-01-07 (4 Comments)
mathematica solution by Daniel (2010-01-07 12:53:17)
Difficulty: 2 of 5Under Delicate Derivative Derivation (in Calculus)
Posted on 2009-12-18 (2 Comments)
analytical solution by Daniel (2009-12-18 13:35:14)
Difficulty: 2 of 5Under More Collinear Points (in Geometry)
Posted on 2009-12-11 (4 Comments)
re(2): counterproof (maybe) by Daniel (2009-12-12 16:00:17)
counterproof (maybe) by Daniel (2009-12-12 10:37:21)
Difficulty: 2 of 5Under 3x3 Grid Near Magic (in Probability)
Posted on 2009-12-05 (6 Comments)
computer solution by Daniel (2009-12-05 13:12:45)
Difficulty: 3 of 5Under A Normal and a Parabola (in Calculus)
Posted on 2009-12-02 (4 Comments)
re(2): solution error found by Daniel (2009-12-02 22:08:16)
solution by Daniel (2009-12-02 12:13:35)
Difficulty: 2 of 5Under Disagreeable Calculator (in Just Math)
Posted on 2009-12-01 (5 Comments)
sequences by Daniel (2009-12-01 13:22:33)
Difficulty: 3 of 5Under Reverse, Add, Palindrome (in Numbers)
Posted on 2009-11-27 (4 Comments)
computer solution by Daniel (2009-11-27 16:31:45)
Difficulty: 2 of 5Under Postal Service (in Numbers)
Posted on 2009-11-17 (4 Comments)
computer solutions by Daniel (2009-11-17 13:18:53)
Difficulty: 3 of 5Under Getting Powerful With Euler II (in Calculus)
Posted on 2009-11-10 (4 Comments)
re(2): puzzling by Daniel (2009-11-10 20:31:36)
Difficulty: 2 of 5Under Sum (Pair Product) = Sum (Triplet Product) (in Probability)
Posted on 2009-11-08 (3 Comments)
Question questions? by Daniel (2009-11-08 14:51:02)
Difficulty: 4 of 5Under Positive Integer ≠ (2P 2Q)/(2R 2S) (in Just Math)
Posted on 2009-11-07 (3 Comments)
solution conditions by Daniel (2009-11-08 07:16:04)
solution with proof by Daniel (2009-11-07 17:18:52)
Difficulty: 3 of 5Under 4xy - x y ≠ Perfect Square (in Just Math)
Posted on 2009-11-01 (3 Comments)
re: No Subject by Daniel (2009-11-02 12:33:50)
Difficulty: 2 of 5Under Author Ascertainment (in Cryptography)
Posted on 2009-10-13 (1 Comments)
solution (spoiler) by Daniel (2009-10-13 12:50:30)
Difficulty: 2 of 5Under 8 points no convex pentagon (in Shapes)
Posted on 2009-10-09 (4 Comments)
possible real solution (not proven yet) by Daniel (2009-10-09 13:37:53)
possible cheat by Daniel (2009-10-09 13:21:31)
Difficulty: 3 of 5Under Mensa Maze (in General)
Posted on 2009-10-07 (8 Comments)
re: Best Minimum? by Daniel (2009-10-07 15:43:13)
re: Best Minimum? by Daniel (2009-10-07 14:28:35)
a start by Daniel (2009-10-07 12:02:35)
Difficulty: 3 of 5Under Reknit Tinker(ed) Ratio (in Numbers)
Posted on 2009-10-04 (4 Comments)
computer solution by Daniel (2009-10-04 15:35:35)
Difficulty: 3 of 5Under ABCD's Of Greatest Divisor (in Numbers)
Posted on 2009-09-24 (3 Comments)
computer solution by Daniel (2009-09-24 11:33:15)
Difficulty: 3 of 5Under Realmazure Rationale II (in Logic)
Posted on 2009-09-23 (3 Comments)
re(2): solution by Daniel (2009-09-23 13:57:53)
solution by Daniel (2009-09-23 11:50:29)
Difficulty: 3 of 5Under Triangular Transcension (in Numbers)
Posted on 2009-09-22 (3 Comments)
computer solution by Daniel (2009-09-22 12:12:10)
computer solution by Daniel (2009-09-22 12:12:08)
Difficulty: 3 of 5Under Ti-1 + 2*(Ti-1)-1 = 2*Ti + (Ti)-1 (in Sequences)
Posted on 2009-09-20 (1 Comments)
a start by Daniel (2009-09-20 15:27:47)
Difficulty: 2 of 5Under Progressively Geometric (in Just Math)
Posted on 2009-09-19 (4 Comments)
possible solution by Daniel (2009-09-19 21:47:49)
Difficulty: 2 of 5Under Fractal Sequence (in Sequences)
Posted on 2009-09-18 (1 Comments)
solution by Daniel (2009-09-18 12:06:59)
Difficulty: 2 of 5Under Cutting the Card (in Shapes)
Posted on 2009-09-16 (3 Comments)
one solution by Daniel (2009-09-16 12:24:01)
Difficulty: 4 of 5Under Unit lengths from movable points to unit triangles. (in Geometry)
Posted on 2009-09-14 (11 Comments)
re(2): more precision by Daniel (2009-09-15 00:05:21)
more precision by Daniel (2009-09-14 23:10:21)
intervals to 2 digits of precision (more to come) by Daniel (2009-09-14 22:31:07)
re(2): initial constraints (a start) by Daniel (2009-09-14 22:26:20)
Initial numerical results by Daniel (2009-09-14 19:32:55)
initial constraints (a start) by Daniel (2009-09-14 18:17:15)
Difficulty: 3 of 5Under Legendre's Mistake (in Numbers)
Posted on 2009-09-11 (1 Comments)
computer solution by Daniel (2009-09-12 11:30:37)
Difficulty: 3 of 5Under Infinitely Continued (in Just Math)
Posted on 2009-09-10 (2 Comments)
simpler solution by Daniel (2009-09-10 16:06:22)
computer aided analytic solution by Daniel (2009-09-10 11:46:47)
Difficulty: 4 of 5Under Unit lengths and triangles (in Geometry)
Posted on 2009-09-09 (2 Comments)
mathematica solution by Daniel (2009-09-09 14:58:36)
Difficulty: 3 of 5Under More Consecutive Semiprimes (in Numbers)
Posted on 2009-09-08 (4 Comments)
part 2 (computer solution) by Daniel (2009-09-08 12:57:22)
part 1 with proof by Daniel (2009-09-08 12:50:03)
Difficulty: 3 of 5Under Minimum Value With Ratio (in Just Math)
Posted on 2009-09-07 (2 Comments)
solution with proof by Daniel (2009-09-07 14:28:42)
Difficulty: 3 of 5Under Near Perfect (in Numbers)
Posted on 2009-09-06 (1 Comments)
computer solution by Daniel (2009-09-06 23:03:43)
Difficulty: 3 of 5Under Greek Approximation (in Numbers)
Posted on 2009-09-05 (2 Comments)
further findings by Daniel (2009-09-05 16:17:30)
computer solution by Daniel (2009-09-05 12:58:55)
Difficulty: 2 of 5Under Some Products Differ by 94 (in Numbers)
Posted on 2009-09-03 (2 Comments)
computer solution by Daniel (2009-09-03 13:32:27)
Difficulty: 2 of 5Under Rotate the Outer (in Numbers)
Posted on 2009-08-30 (2 Comments)
analytical solution by Daniel (2009-08-30 14:05:42)
Difficulty: 2 of 5Under A! + B! + C! = 3D (in Just Math)
Posted on 2009-08-27 (5 Comments)
Solution analytical solution by Daniel (2009-08-27 11:33:12)
Difficulty: 2 of 5Under Priming a Square (in Numbers)
Posted on 2009-08-23 (3 Comments)
mathematica solution by Daniel (2009-08-23 17:29:46)
Difficulty: 3 of 5Under From Figsdale, Going to Garsville (in Just Math)
Posted on 2009-08-22 (2 Comments)
spreadsheet solution by Daniel (2009-08-22 14:17:11)
Difficulty: 2 of 5Under Year of the Roman (in Numbers)
Posted on 2009-08-21 (5 Comments)
another interpretation by Daniel (2009-08-21 12:07:17)
an answer to start with by Daniel (2009-08-21 11:33:55)
Difficulty: 2 of 5Under Number = Power Remainder (in Numbers)
Posted on 2009-08-20 (3 Comments)
Qbasic solution by Daniel (2009-08-20 11:24:10)
Mathematica solution by Daniel (2009-08-20 11:17:59)
Difficulty: 3 of 5Under The Shadow in a Sphere (in Shapes)
Posted on 2009-08-19 (7 Comments)
Question clarification by Daniel (2009-08-19 11:53:35)
Difficulty: 2 of 5Under Even Corners and Equal Subgrids (in Numbers)
Posted on 2009-08-18 (5 Comments)
Solution computer solution by Daniel (2009-08-18 13:07:23)
Difficulty: 3 of 5Under Prime * Prime (in Numbers)
Posted on 2009-08-15 (2 Comments)
Solution pencil and paper solution by Daniel (2009-08-15 23:10:39)
Difficulty: 2 of 5Under Piano and Potent Pane (in Numbers)
Posted on 2009-08-12 (6 Comments)
basic solution by Daniel (2009-08-12 11:40:33)
Difficulty: 2 of 5Under First Digit Four (in Numbers)
Posted on 2009-08-08 (3 Comments)
mathematica solution by Daniel (2009-08-08 12:40:02)
Difficulty: 2 of 5Under Even Erasure (in Just Math)
Posted on 2009-08-05 (3 Comments)
analytical solution by Daniel (2009-08-05 12:01:19)
Difficulty: 3 of 5Under Realmazure Rationale (in Logic)
Posted on 2009-08-02 (4 Comments)
solution w/ explanation by Daniel (2009-08-02 13:50:53)
Difficulty: 2 of 5Under How and When (in Numbers)
Posted on 2009-07-29 (17 Comments)
re(5): two views by Daniel (2009-07-31 01:48:02)
re(2): two views (UBASIC) by Daniel (2009-07-30 20:29:21)
re(3): Integrity? (interesting property) by Daniel (2009-07-29 22:58:18)
re: Integrity? (interesting property) by Daniel (2009-07-29 18:05:42)
Difficulty: 2 of 5Under Getting Powerful With Euler (in Calculus)
Posted on 2009-07-28 (3 Comments)
exact solution by Daniel (2009-07-28 13:02:43)
Difficulty: 2 of 5Under Dividing a Rectangle (in Geometry)
Posted on 2009-07-25 (1 Comments)
solution by Daniel (2009-07-25 15:21:25)
Difficulty: 3 of 5Under Sum = Cube Root 2, Triplet Not (in Just Math)
Posted on 2009-07-23 (2 Comments)
proof with assumption by Daniel (2009-07-23 12:34:12)
Difficulty: 3 of 5Under Word Grid (in Word Problems)
Posted on 2009-07-19 (5 Comments)
computer solution by Daniel (2009-07-19 23:39:22)
Difficulty: 2 of 5Under Some Inverses Sum Inverse (in Just Math)
Posted on 2009-07-18 (2 Comments)
analytical solution by Daniel (2009-07-18 13:20:06)
Difficulty: 3 of 5Under and W (in Word Problems)
Posted on 2009-07-14 (5 Comments)
Google's thoughts by Daniel (2009-07-15 05:08:03)
Difficulty: 2 of 5Under Reciprocals (in Just Math)
Posted on 2009-07-12 (1 Comments)
analytical solution by Daniel (2009-07-12 13:32:09)
Difficulty: 3 of 5Under Sum Powers Sum Square II (in Just Math)
Posted on 2009-07-08 (6 Comments)
oops slight error by Daniel (2009-07-09 23:54:40)
re: Aaaaaah (furshlugginer formatting) - trying solution again by Daniel (2009-07-09 01:23:20)
Difficulty: 3 of 5Under Partridge Pandigital Set (in Numbers)
Posted on 2009-07-05 (3 Comments)
a pretty good start by Daniel (2009-07-05 11:55:43)
Difficulty: 2 of 5Under How much time will you spend? (in Tricks)
Posted on 2009-06-29 (3 Comments)
solution by Daniel (2009-06-29 21:20:52)
Difficulty: 3 of 5Under Pandigital Processed Primes (in Numbers)
Posted on 2009-06-27 (1 Comments)
solution by Daniel (2009-06-28 09:39:37)
Difficulty: 2 of 5Under Subtract 1, get a square (in Just Math)
Posted on 2009-06-24 (4 Comments)
re: general solution (no proof yet) by Daniel (2009-06-24 20:15:49)
general solution (no proof yet) by Daniel (2009-06-24 14:43:38)
computer solution by Daniel (2009-06-24 12:52:23)
Difficulty: 3 of 5Under Bounded Sine (in Shapes)
Posted on 2009-06-23 (2 Comments)
generalization by Daniel (2009-06-23 16:08:59)
solution by Daniel (2009-06-23 12:36:42)
Difficulty: 2 of 5Under Multiply Sum and Sum of Squares (in Numbers)
Posted on 2009-06-22 (4 Comments)
computer solution by Daniel (2009-06-22 12:42:06)
Difficulty: 3 of 5Under THIS*THAT*IT (in Numbers)
Posted on 2009-06-19 (3 Comments)
computer solution by Daniel (2009-06-19 12:55:27)
Difficulty: 3 of 5Under The Shell Game (in Sequences)
Posted on 2009-06-18 (4 Comments)
re(2): some thoughts and questions by Daniel (2009-06-18 23:17:24)
some thoughts and questions by Daniel (2009-06-18 12:09:35)
Difficulty: 3 of 5Under Triangles and Squares (in Geometry)
Posted on 2009-06-17 (4 Comments)
yellow/cyan proof by Daniel (2009-06-17 13:07:25)
Difficulty: 2 of 5Under Two way tube. (in Shapes)
Posted on 2009-06-15 (2 Comments)
general solution by Daniel (2009-06-16 02:05:15)
solution by Daniel (2009-06-15 19:05:41)
Difficulty: 3 of 5Under Star in the Pentagon (in Geometry)
Posted on 2009-06-09 (2 Comments)
computer solution by Daniel (2009-06-09 13:48:33)
Difficulty: 3 of 5Under Pandigital and Pretty Powerful IV (in Numbers)
Posted on 2009-06-06 (2 Comments)
computer solution by Daniel (2009-06-06 13:32:41)
Difficulty: 4 of 5Under The 5 cards Magic trick Rechallenges! (in Logic)
Posted on 2009-06-01 (4 Comments)
re(2): Corection To The Problem!!! Please Read by Daniel (2009-06-01 21:58:35)
Difficulty: 3 of 5Under Pandigital Recycling Points (in Logic)
Posted on 2009-05-31 (5 Comments)
analytic solution by Daniel (2009-05-31 13:30:35)
computer solution by Daniel (2009-05-31 13:07:45)
Difficulty: 2 of 5Under Prime square with distinct digits (in Numbers)
Posted on 2009-05-30 (2 Comments)
mathematica solution by Daniel (2009-05-30 13:01:42)
Difficulty: 4 of 5Under 5 Cards Magic Trick (in Logic)
Posted on 2009-05-29 (7 Comments)
my solution by Daniel (2009-05-29 14:25:22)
Difficulty: 3 of 5Under Tri-Blades (in Geometry)
Posted on 2009-05-28 (2 Comments)
complete solution by Daniel (2009-05-28 16:19:04)
Difficulty: 2 of 5Under Try, Four and Five (in Numbers)
Posted on 2009-05-27 (3 Comments)
computer solution by Daniel (2009-05-27 11:58:08)
Difficulty: 2 of 5Under Circumcircle and Incircle (in Just Math)
Posted on 2009-05-26 (4 Comments)
mathematica solution by Daniel (2009-05-26 12:39:20)
Difficulty: 2 of 5Under Six Seat Schedule (in Logic)
Posted on 2009-05-25 (4 Comments)
computer solution by Daniel (2009-05-25 14:35:08)
Difficulty: 3 of 5Under Pairs of Prime Factors (in Numbers)
Posted on 2009-05-24 (2 Comments)
mathematica solution by Daniel (2009-05-24 15:08:38)
Difficulty: 2 of 5Under six = five (in Numbers)
Posted on 2009-05-23 (2 Comments)
computer solution by Daniel (2009-05-23 12:39:26)
Difficulty: 2 of 5Under See the top (in Numbers)
Posted on 2009-05-21 (2 Comments)
computer solution by Daniel (2009-05-21 15:58:25)
Difficulty: 3 of 5Under Tom and Harry Run to School (in Just Math)
Posted on 2009-05-20 (2 Comments)
analytic solution by Daniel (2009-05-20 12:12:17)
Difficulty: 2 of 5Under Getting Natural With Sine (in Calculus)
Posted on 2009-05-19 (3 Comments)
analytic solution by Daniel (2009-05-19 13:04:15)
Difficulty: 2 of 5Under Set of Primes (in Probability)
Posted on 2009-05-18 (6 Comments)
re(2): solution by Daniel (2009-05-18 12:01:42)
solution by Daniel (2009-05-18 11:56:47)
Difficulty: 2 of 5Under Roman Trivia (in Numbers)
Posted on 2009-05-17 (5 Comments)
my output by Daniel (2009-05-17 17:04:47)
answers to 1,2,3 working on 4 by Daniel (2009-05-17 14:11:26)
Difficulty: 3 of 5Under Curious Cubic Triplet(s) (in Just Math)
Posted on 2009-05-16 (2 Comments)
Analytic solution by Daniel (2009-05-16 13:42:28)
Difficulty: 2 of 5Under Dimensions of a box (in Calculus)
Posted on 2009-05-15 (3 Comments)
solution by Daniel (2009-05-15 13:11:18)
Difficulty: 3 of 5Under Roman Square (in Numbers)
Posted on 2009-05-13 (4 Comments)
computer solution (all of them) by Daniel (2009-05-17 16:57:44)
Difficulty: 2 of 5Under Pandigital and Pretty Powerful III (in Numbers)
Posted on 2009-05-12 (4 Comments)
computer solution by Daniel (2009-05-12 13:10:34)
Difficulty: 1 of 5Under Random chord problem (in Geometry)
Posted on 2009-05-11 (15 Comments)
re(2): solution, maybe (good question) (my bad) by Daniel (2009-05-11 21:03:33)
re: solution, maybe (good question) by Daniel (2009-05-11 20:09:37)
solution by Daniel (2009-05-11 12:03:38)
Difficulty: 2 of 5Under Magic Trick (in Numbers)
Posted on 2009-05-10 (8 Comments)
re: my minimumm- spoiler by Daniel (2009-05-11 15:16:31)
Difficulty: 2 of 5Under 2N Digit Numbers (in Numbers)
Posted on 2009-05-09 (5 Comments)
2 more by Daniel (2009-05-10 22:13:51)
re: computer solution by Daniel (2009-05-10 09:20:05)
Difficulty: 3 of 5Under Pandigital and Pretty Powerful II (in Numbers)
Posted on 2009-05-06 (2 Comments)
computer solution by Daniel (2009-05-06 11:51:47)
Difficulty: 2 of 5Under Taking the 5th (in Numbers)
Posted on 2009-05-03 (5 Comments)
re: Different signs (good point) by Daniel (2009-05-03 19:55:37)
computer solution by Daniel (2009-05-03 13:11:47)
Difficulty: 3 of 5Under Curious Cubic Constant (in Numbers)
Posted on 2009-05-02 (3 Comments)
computer solution by Daniel (2009-05-02 20:14:02)
Difficulty: 2 of 5Under Binomial Pandigital(s) (in Numbers)
Posted on 2009-04-28 (3 Comments)
Computer Solution by Daniel (2009-04-28 11:43:59)
Difficulty: 2 of 5Under B-nary (in Numbers)
Posted on 2009-04-27 (2 Comments)
re: somewhat of a solution (some thoughts) by Daniel (2009-04-27 21:44:10)
Difficulty: 2 of 5Under ten - nine = 1 (in Numbers)
Posted on 2009-04-23 (4 Comments)
computer solution by Daniel (2009-04-23 11:48:49)
Difficulty: 3 of 5Under Factorials and Powers (in Just Math)
Posted on 2009-04-22 (8 Comments)
analytical solution (not complete) by Daniel (2009-04-22 14:19:02)
Difficulty: 4 of 5Under In a Mystery.... (in Word Problems)
Posted on 2009-04-16 (12 Comments)
re: Another one by Daniel (2009-04-16 13:32:38)
Difficulty: 2 of 5Under Newsless Alphametics (in Just Math)
Posted on 2009-04-15 (5 Comments)
re: all's well that ends well by Daniel (2009-04-15 13:03:21)
Difficulty: 2 of 5Under Powering up the digits (in Numbers)
Posted on 2009-04-12 (4 Comments)
more solutions by Daniel (2009-04-13 14:54:01)
computer solution (spoiler) by Daniel (2009-04-12 17:06:14)
Difficulty: 3 of 5Under Prime Squares (in Numbers)
Posted on 2009-04-09 (4 Comments)
re(2): computer solution (spoiler) by Daniel (2009-04-09 16:59:59)
computer solution (spoiler) by Daniel (2009-04-09 11:42:29)
Difficulty: 3 of 5Under Fifth root (cubic) = Cube root (quintic) (in Just Math)
Posted on 2009-04-05 (5 Comments)
re: Oops! Solution by reading the problem. by Daniel (2009-04-05 17:54:38)
Difficulty: 4 of 5Under Alphabet from 8 Words (in Word Problems)
Posted on 2009-04-04 (4 Comments)
re(2): 2 solutions (spoiler) by Daniel (2009-04-05 09:27:38)
all computer solutions and code by Daniel (2009-04-05 04:01:58)
2 solutions (spoiler) by Daniel (2009-04-05 03:43:19)
Difficulty: 3 of 5Under Derivative chains. (in Calculus)
Posted on 2009-03-29 (6 Comments)
re(2): Partially done but help needed (Spoiler) by Daniel (2009-03-31 21:03:02)
Difficulty: 3 of 5Under Dicey numbers (in Numbers)
Posted on 2009-03-27 (6 Comments)
Generalized solution by Daniel (2009-03-29 03:10:33)
re: edge of darkness / solution (pattern found) by Daniel (2009-03-28 00:22:38)
Difficulty: 3 of 5Under The Hare and Tortoise Rematch (in General)
Posted on 2009-03-26 (15 Comments)
re(4): Complete solution (spdsht explan) - Help by Daniel (2009-03-27 22:13:43)
re(2): Complete solution (spreadsheet explanation) by Daniel (2009-03-27 16:17:56)
re(2): Complete solution by Daniel (2009-03-27 05:24:08)
Complete solution by Daniel (2009-03-27 04:22:19)
re: Well, yes and no! by Daniel (2009-03-26 16:44:32)
Triangle Track solution by Daniel (2009-03-26 12:30:37)
Difficulty: 2 of 5Under Edgy Integral (in Calculus)
Posted on 2009-03-25 (4 Comments)
computer solution by Daniel (2009-03-25 13:11:15)
Difficulty: 3 of 5Under Pandigital and Pretty Powerful (in Numbers)
Posted on 2009-03-23 (4 Comments)
re(2): computer solution by Daniel (2009-03-23 18:01:16)
computer solution by Daniel (2009-03-23 11:47:27)
Difficulty: 2 of 5Under Making integer an expression (in Just Math)
Posted on 2009-03-20 (12 Comments)
re(3): Simplifying matters (Spoiler) (some thoughts) by Daniel (2009-03-25 19:06:29)
re: Simplifying matters (Spoiler) (some thoughts) by Daniel (2009-03-24 14:36:47)
Difficulty: 3 of 5Under 8 Words (in Word Problems)
Posted on 2009-03-19 (13 Comments)
Hints/Tips helpfull info (word list) by Daniel (2009-03-19 17:23:32)
Difficulty: 4 of 5Under Perplexing Dual Vowels (in Word Problems)
Posted on 2009-03-13 (8 Comments)
Some Thoughts about the sentence by Daniel (2009-03-14 12:38:05)
Difficulty: 3 of 5Under 1+5+6+7 = 21? (in Numbers)
Posted on 2009-03-12 (7 Comments)
re(2): one solution by Daniel (2009-03-12 12:46:02)
one solution by Daniel (2009-03-12 11:17:00)
Difficulty: 2 of 5Under 2009 a cube? Baseless! (in Just Math)
Posted on 2009-03-09 (5 Comments)
analytic solution by Daniel (2009-03-09 18:42:10)
Difficulty: 3 of 5Under A Hand of Cards (in Logic)
Posted on 2009-03-08 (3 Comments)
solution explanation by Daniel (2009-03-08 21:55:30)
Difficulty: 2 of 5Under Sequence with only 3 numbers (in Just Math)
Posted on 2009-03-07 (11 Comments)
general solution by Daniel (2009-03-07 22:59:00)
my solution by Daniel (2009-03-07 14:09:34)
Difficulty: 2 of 5Under Integer Side Lengths (in Just Math)
Posted on 2009-03-05 (8 Comments)
Solution complete solution by Daniel (2009-03-05 12:22:46)
Difficulty: 2 of 5Under Palindromic and Tautonymic (in Numbers)
Posted on 2009-03-03 (5 Comments)
Computer Solution by Daniel (2009-03-03 13:29:50)
Difficulty: 2 of 5Under Seq.(Seq.(Seq.)) seeking sod (in Sequences)
Posted on 2009-03-01 (3 Comments)
re: True but unprovable by Daniel (2009-03-02 19:34:39)
Difficulty: 3 of 5Under super powerful pandigitals (in Numbers)
Posted on 2009-02-24 (7 Comments)
re: Uncertain by Daniel (2009-02-24 14:51:15)
Difficulty: 2 of 5Under Curious Consecutive Cyphers II (in Just Math)
Posted on 2009-02-23 (7 Comments)
re(3): Computer Solution by Daniel (2009-02-23 13:10:46)
Computer Solution by Daniel (2009-02-23 11:55:33)
Difficulty: 4 of 5Under I Do Belong (in Numbers)
Posted on 2009-02-22 (3 Comments)
re(2): computer solution by Daniel (2009-02-23 10:08:19)
computer solution by Daniel (2009-02-22 14:23:49)
Difficulty: 2 of 5Under Two players, two pots (in Games)
Posted on 2009-02-21 (2 Comments)
almost complete solution by Daniel (2009-02-21 18:43:08)
Difficulty: 2 of 5Under Now, the Old Hat (in Numbers)
Posted on 2009-02-20 (5 Comments)
re: Supercomputer? by Daniel (2009-02-20 12:36:56)
computer solution by Daniel (2009-02-20 12:04:35)
Difficulty: 3 of 5Under The Prime Time Soccer Team (in Numbers)
Posted on 2009-02-19 (3 Comments)
Mathematica Solution by Daniel (2009-02-19 11:55:21)
Difficulty: 3 of 5Under Happy 2009 to you all (in Just Math)
Posted on 2009-02-08 (3 Comments)
solution (no explanation) by Daniel (2009-02-09 00:34:54)
Difficulty: 2 of 5Under Attack and defense (in Probability)
Posted on 2009-02-06 (2 Comments)
my strategy by Daniel (2009-02-06 13:59:28)
Difficulty: 3 of 5Under Why, it's elementary my dear 74851687! (in Riddles)
Posted on 2009-02-04 (10 Comments)
re(2): some thoughts by Daniel (2009-02-04 13:42:36)
Some Thoughts re: some thoughts by Daniel (2009-02-04 13:16:53)
Difficulty: 4 of 5Under Hypercells (in Numbers)
Posted on 2009-02-02 (10 Comments)
number of solutions by Daniel (2009-02-03 02:46:08)
re: 1 solution, program running for remaining by Daniel (2009-02-03 02:00:17)
1 solution, program running for remaining by Daniel (2009-02-03 00:25:29)
Difficulty: 2 of 5Under Fondu, anyone? (in General)
Posted on 2009-02-02 (4 Comments)
Solution solution (spoiler) by Daniel (2009-02-02 20:36:42)
Hints/Tips I completely agree :-) by Daniel (2009-02-02 20:35:56)
Difficulty: 3 of 5Under Winning the Competition (in Probability)
Posted on 2009-01-25 (3 Comments)
clarification please by Daniel (2009-01-25 14:04:13)
Difficulty: 3 of 5Under Prisoner's Visitors Problem (in Logic)
Posted on 2009-01-21 (7 Comments)
re: (all solutions) UNCURSED! thanks by Daniel (2009-01-22 00:27:44)
program code by Daniel (2009-01-21 22:22:03)
Solution (all solutions) (sign of the beast) by Daniel (2009-01-21 22:19:13)
initial idea by Daniel (2009-01-21 15:52:15)
Difficulty: 2 of 5Under Even Perimeter (in Just Math)
Posted on 2009-01-16 (3 Comments)
complete solution by Daniel (2009-01-16 12:26:51)
Difficulty: 2 of 5Under A woman, her car, and a hotel... (in Riddles)
Posted on 2009-01-13 (9 Comments)
Solution (spoiler) by Daniel (2009-01-13 23:58:41)
Difficulty: 3 of 5Under January Math Challenge in 3 Parts (in Numbers)
Posted on 2009-01-08 (5 Comments)
Part II (computer solution) by Daniel (2009-01-08 13:43:05)
Part I (computer solution) by Daniel (2009-01-08 13:39:19)
Difficulty: 2 of 5Under Mighty Mysterious Missive (in Cryptography)
Posted on 2009-01-03 (4 Comments)
method (spoiler) by Daniel (2009-01-04 05:03:07)
my answer by Daniel (2009-01-04 04:59:52)
Difficulty: 2 of 5Under The box (in Just Math)
Posted on 2009-01-02 (7 Comments)
somewhat analytical solution by Daniel (2009-01-02 21:41:48)
Difficulty: 3 of 5Under The great tunnel switch II (in Algorithms)
Posted on 2008-12-26 (9 Comments)
re(2): possible solution -Oh that easy? by Daniel (2008-12-27 05:30:52)
possible solution by Daniel (2008-12-27 03:13:52)
Difficulty: 4 of 5Under Boats (in Just Math)
Posted on 2008-12-22 (3 Comments)
complete solution by Daniel (2008-12-22 16:39:08)
Difficulty: 3 of 5Under Some Factorials Sum Power (in Just Math)
Posted on 2008-12-21 (4 Comments)
re(2): solution with proof - Kudos! by Daniel (2008-12-22 15:37:58)
solution with proof by Daniel (2008-12-22 00:41:08)
Difficulty: 2 of 5Under The last locker (in Just Math)
Posted on 2008-12-20 (4 Comments)
analytical solution by Daniel (2008-12-20 22:40:55)
Difficulty: 2 of 5Under Locksmith (in Logic)
Posted on 2008-12-19 (10 Comments)
re(2): Any mistake? (possible spoiler) by Daniel (2008-12-20 03:30:44)
Difficulty: 3 of 5Under Power x mod x (in Just Math)
Posted on 2008-12-18 (5 Comments)
thoughts on solution by Daniel (2008-12-18 21:09:02)
Difficulty: 3 of 5Under Space Junk (in Logic)
Posted on 2008-11-29 (3 Comments)
re: i'm afraid there is a little glitch, but here it goes by Daniel (2008-12-06 02:11:22)
Solution solution (no explanation ... yet) by Daniel (2008-11-30 01:37:44)
Difficulty: 3 of 5Under Triangle Area (in Geometry)
Posted on 2008-11-28 (11 Comments)
easier "cheat" answer by Daniel (2008-11-30 07:06:11)
computer aided solution by Daniel (2008-11-29 05:58:58)
Difficulty: 3 of 5Under The farmer and the pig (in Calculus)
Posted on 2008-11-13 (5 Comments)
re(2): Analytical Solution by Daniel (2008-11-19 09:27:55)
Analytical Solution by Daniel (2008-11-17 14:43:48)
Difficulty: 2 of 5Under f(1998) (in Just Math)
Posted on 2008-10-31 (4 Comments)
re: Similar solution by Daniel (2008-11-01 17:19:42)
Solution analytical solution by Daniel (2008-10-31 14:36:05)
Difficulty: 3 of 5Under Absolute Value And Real Constant (in Just Math)
Posted on 2008-10-17 (3 Comments)
solution by Daniel (2008-10-17 13:45:18)
Difficulty: 2 of 5Under Inversely Integrating An Inverse (in Calculus)
Posted on 2008-10-15 (3 Comments)
re: Numerical answer by Daniel (2008-10-15 14:34:46)
Difficulty: 2 of 5Under 9 balls, 10 straight lines (in General)
Posted on 2008-10-12 (21 Comments)
re: Generic answer (Spoiler) by Daniel (2008-10-13 17:45:10)
Difficulty: 2 of 5Under Going pandigital with P and Q (in Numbers)
Posted on 2008-10-11 (2 Comments)
mathematia's answer by Daniel (2008-10-11 12:03:01)
Difficulty: 3 of 5Under Maximum and cubic to a T (in Just Math)
Posted on 2008-10-09 (6 Comments)
analytic solution by Daniel (2008-10-09 21:28:30)
Difficulty: 2 of 5Under Who committed the murder? (in Logic)
Posted on 2008-10-08 (5 Comments)
re: Solution by Daniel (2008-10-08 13:09:52)
Difficulty: 3 of 5Under Half Perpendicular Times Two (in Geometry)
Posted on 2008-10-06 (2 Comments)
proof :-) by Daniel (2008-10-06 18:01:34)
Difficulty: 4 of 5Under Power 2 Sum Power 3 And 5 (in Just Math)
Posted on 2008-10-04 (11 Comments)
almost proof ;-) by Daniel (2008-10-05 00:46:33)
Difficulty: 3 of 5Under Sum Inverse LCMs (in Just Math)
Posted on 2008-10-03 (7 Comments)
re: a stab (proof) by Daniel (2008-10-03 14:24:29)
Difficulty: 3 of 5Under Sum of Squares (in Numbers)
Posted on 2008-09-26 (6 Comments)
more generalized solution by Daniel (2008-09-27 11:55:04)
re(3): solution (spoiler) -- print SIGMA by Daniel (2008-09-26 19:27:47)
re: solution (spoiler) by Daniel (2008-09-26 12:39:31)
solution (spoiler) by Daniel (2008-09-26 12:35:54)
Difficulty: 2 of 5Under Somewhere Near the Center (in Shapes)
Posted on 2008-09-09 (3 Comments)
solution by parts (spoiler) by Daniel (2008-09-09 13:48:21)
Difficulty: 3 of 5Under Some Reals Sum Two (in Just Math)
Posted on 2008-09-01 (6 Comments)
re: solution checking by Daniel (2008-09-01 14:21:20)
Solution solution (spoiler) by Daniel (2008-09-01 13:06:26)
Difficulty: 3 of 5Under Prime suspect (in Calculus)
Posted on 2008-08-31 (3 Comments)
re: solution (spoiler) by Daniel (2008-08-31 13:52:25)
Solution solution (spoiler) by Daniel (2008-08-31 13:22:02)
Difficulty: 2 of 5Under Catching your enemy (in Logic)
Posted on 2008-08-25 (20 Comments)
re(2): interesting question by Daniel (2008-08-25 22:38:27)
Some Thoughts interesting question by Daniel (2008-08-25 21:15:49)
Difficulty: 2 of 5Under No repeated numbers (in Logic)
Posted on 2008-08-20 (20 Comments)
optimal algarithm (no proof) by Daniel (2008-08-21 00:12:55)
possible solution (spoiler) by Daniel (2008-08-20 15:35:42)
Difficulty: 3 of 5Under Subtract 1 from squared abbbb (in Just Math)
Posted on 2008-08-16 (6 Comments)
Analytical Solution (spoiler) by Daniel (2008-08-16 15:29:36)
Difficulty: 3 of 5Under All 10 Digits (in Numbers)
Posted on 2008-08-12 (2 Comments)
computer solution (spoiler) by Daniel (2008-08-12 17:24:22)
Difficulty: 3 of 5Under Some Reals Sum Integer (in Just Math)
Posted on 2008-08-07 (3 Comments)
new approach (spoiler) by Daniel (2008-08-22 22:00:37)
Solution with link to proof (spoiler) by Daniel (2008-08-08 07:03:55)
Difficulty: 4 of 5Under A digital root-perfect power problem (in Just Math)
Posted on 2008-07-01 (7 Comments)
digit counts by Daniel (2008-12-29 06:55:56)
Difficulty: 1 of 5Under Two English words (in Word Problems)
Posted on 2008-06-27 (8 Comments)
solution by Daniel (2008-06-27 13:45:09)
Difficulty: 3 of 5Under The horse and the grass field (in Calculus)
Posted on 2008-06-15 (3 Comments)
Solution solution by Daniel (2008-06-15 21:06:19)
Difficulty: 3 of 5Under Evaluate this infinite product (in Calculus)
Posted on 2008-06-05 (5 Comments)
Analytical solution by Daniel (2008-06-07 15:40:35)
Difficulty: 2 of 5Under Empowering Inverse Products (in Calculus)
Posted on 2008-06-02 (7 Comments)
quick solution by Daniel (2008-06-02 13:43:06)
Difficulty: 3 of 5Under Continental Pole of Inaccessibility (in General)
Posted on 2008-05-14 (17 Comments)
solution (maybe) by Daniel (2008-05-14 12:04:39)
Difficulty: 2 of 5Under It's right under your nose (from time to time) (in Tricks)
Posted on 2008-05-09 (7 Comments)
solution by Daniel (2008-05-09 11:18:30)
Difficulty: 2 of 5Under Set of triplets (in Numbers)
Posted on 2008-05-08 (7 Comments)
solution by Daniel (2008-05-08 22:11:51)
Difficulty: 3 of 5Under Fund Raiser (in Numbers)
Posted on 2008-05-01 (1 Comments)
computer solution by Daniel (2008-05-01 19:04:13)
Difficulty: 1 of 5Under 1,000 (in Tricks)
Posted on 2008-04-28 (18 Comments)
other idea by Daniel (2008-04-28 20:15:31)
Difficulty: 3 of 5Under These Letters (in Sequences)
Posted on 2008-02-07 (6 Comments)
solution spoiler by Daniel (2008-02-08 12:59:44)
Difficulty: 3 of 5Under Equate To - 8, Get Roots (in Just Math)
Posted on 2008-02-02 (6 Comments)
exact solution by Daniel (2008-02-03 12:11:50)
Difficulty: 2 of 5Under Find The Value (in Calculus)
Posted on 2008-01-28 (1 Comments)
Solution solution by Daniel (2008-01-28 12:13:55)
Difficulty: 3 of 5Under Primitive Pythagorean Triangles (in Geometry)
Posted on 2008-01-26 (3 Comments)
re(2): solution by Daniel (2008-01-27 01:54:02)
solution by Daniel (2008-01-26 16:31:54)
Difficulty: 3 of 5Under Circle And Intersection (in Geometry)
Posted on 2008-01-25 (6 Comments)
solution (no proof of uniqueness) by Daniel (2008-01-25 11:43:33)
Difficulty: 3 of 5Under Centroid And Summed Ratios (in Geometry)
Posted on 2008-01-17 (1 Comments)
answer (no proof) by Daniel (2008-01-18 09:25:26)
Difficulty: 3 of 5Under Sum the Points of Tangency (in Geometry)
Posted on 2008-01-16 (1 Comments)
Solution complete solution by Daniel (2008-01-18 02:26:11)
Difficulty: 3 of 5Under Orders of Finish (in Numbers)
Posted on 2008-01-12 (6 Comments)
re(2): simple computation algorithm by Daniel (2008-01-14 01:56:33)
Some Thoughts simple computation algorithm by Daniel (2008-01-13 09:53:07)
Difficulty: 3 of 5Under Exponential And Natural (in Calculus)
Posted on 2008-01-08 (3 Comments)
full solution by Daniel (2008-01-09 09:44:22)
Difficulty: 3 of 5Under Area of Pentagon (in Geometry)
Posted on 2008-01-07 (4 Comments)
Solution different approach by Daniel (2008-01-08 00:33:41)
Difficulty: 2 of 5Under Exponentiate Negatively, Get Value (in Calculus)
Posted on 2007-12-24 (6 Comments)
re(2): complete solution by Daniel (2007-12-25 10:52:58)
complete solution by Daniel (2007-12-25 02:14:37)
Difficulty: 2 of 5Under Progressions with perfect squares! (in Just Math)
Posted on 2007-12-20 (2 Comments)
complete solution by Daniel (2007-12-20 12:21:09)
Difficulty: 3 of 5Under Getting Natural With Pi (in Calculus)
Posted on 2007-11-27 (8 Comments)
Solution analytical solution by Daniel (2007-11-27 13:51:46)
Difficulty: 3 of 5Under Isosceles Triangle (in Geometry)
Posted on 2007-11-21 (3 Comments)
Solution computer aided solution by Daniel (2007-11-21 12:49:14)
Difficulty: 2 of 5Under Getting To PC With A Circle (in Geometry)
Posted on 2007-11-10 (9 Comments)
Solution solution (different approach) by Daniel (2007-11-11 00:21:19)
Difficulty: 3 of 5Under Sum Two Squares (in Numbers)
Posted on 2007-11-02 (2 Comments)
re: Solution extra "trivial" solution by Daniel (2007-11-02 18:03:46)
Difficulty: 4 of 5Under Color Coded Cubes (in Numbers)
Posted on 2007-10-30 (4 Comments)
Solution analytical solution by Daniel (2007-10-31 04:02:17)
Difficulty: 3 of 5Under An Exponent Product And 98 Zeroes Puzzle (in Just Math)
Posted on 2007-10-27 (12 Comments)
apologies by Daniel (2007-10-28 17:10:27)
new minimum found by Daniel (2007-10-28 06:02:34)
new minimum found by Daniel (2007-10-28 06:02:03)
new minimum found by Daniel (2007-10-28 06:02:02)
new minimum found by Daniel (2007-10-28 06:02:00)
new minimum found by Daniel (2007-10-28 06:01:59)
new minimum found by Daniel (2007-10-28 06:01:58)
new minimum found by Daniel (2007-10-28 06:01:57)
Difficulty: 3 of 5Under Equate The Integrals, Get Constant (in Calculus)
Posted on 2007-10-24 (3 Comments)
full solution by Daniel (2007-10-24 18:18:26)
Difficulty: 2 of 5Under Linear and quadratic (in Calculus)
Posted on 2007-10-23 (9 Comments)
re: No Subject by Daniel (2007-10-23 18:12:55)
Difficulty: 3 of 5Under Acute triangle, Trigonometric function! (in Just Math)
Posted on 2007-10-13 (9 Comments)
proof (maybe) by Daniel (2007-10-14 05:32:49)
Difficulty: 2 of 5Under Out of gas. (in Tricks)
Posted on 2007-09-22 (29 Comments)
re: solution by Daniel (2007-09-23 13:37:05)
Solution solution by Daniel (2007-09-23 13:31:51)
Difficulty: 3 of 5Under Getting Squared With 1 And 16 (in Just Math)
Posted on 2007-09-01 (5 Comments)
some general solutions by Daniel (2007-09-02 05:37:51)
Difficulty: 3 of 5Under Take Quadratic And Cubic, Get Sum And Product (in Just Math)
Posted on 2007-08-24 (4 Comments)
re: Solution (little thing to add) by Daniel (2007-08-25 02:15:58)
Difficulty: 4 of 5Under Missing Numbers Please (in Sequences)
Posted on 2007-08-21 (7 Comments)
Solution (spoiler) by Daniel (2007-08-22 01:18:49)
Hints/Tips hint by Daniel (2007-08-22 01:12:55)
Difficulty: 3 of 5Under Sum Numbers, Get Even (Digits)? (in Just Math)
Posted on 2007-08-15 (5 Comments)
solution by Daniel (2007-08-15 11:17:45)
Difficulty: 2 of 5Under Prove the inequality (in Just Math)
Posted on 2007-08-12 (6 Comments)
re(2): solution with proof (quick fix) by Daniel (2007-08-14 02:07:53)
solution with proof by Daniel (2007-08-13 01:57:05)
Difficulty: 3 of 5Under Some Hardy Ramanujan variants (in Numbers)
Posted on 2007-06-02 (2 Comments)
computer solution to first part by Daniel (2007-06-02 15:49:05)
Difficulty: 4 of 5Under The Irrational Units Digit (in Numbers)
Posted on 2007-05-21 (4 Comments)
formula (no proof) by Daniel (2007-05-21 14:47:39)
Difficulty: 1 of 5Under A turtles' problem (in Tricks)
Posted on 2007-05-17 (16 Comments)
a solution by Daniel (2007-05-17 14:00:55)
Difficulty: 3 of 5Under Another 2007 Problem (in Numbers)
Posted on 2007-02-19 (7 Comments)
re(2): a partial solution to B by Daniel (2007-02-20 03:33:11)
a partial solution to B by Daniel (2007-02-20 01:00:08)
Difficulty: 3 of 5Under Arithmetic Progression Triangle (in Geometry)
Posted on 2007-01-28 (5 Comments)
Solution solution by Daniel (2007-01-30 14:06:08)
Difficulty: 3 of 5Under Factors and Primes (in Numbers)
Posted on 2007-01-24 (3 Comments)
Some Thoughts a start by Daniel (2007-01-24 10:34:13)
Difficulty: 3 of 5Under Divisibility (in Numbers)
Posted on 2007-01-08 (6 Comments)
re: Some more thoughts by Daniel (2007-01-09 11:02:29)
Difficulty: 3 of 5Under A 2007 Problem (in Just Math)
Posted on 2007-01-04 (2 Comments)
Some Thoughts solution comment by Daniel (2009-02-02 21:36:51)
Difficulty: 2 of 5Under A Constant Puzzle (in Just Math)
Posted on 2006-12-02 (4 Comments)
re(2): solutions (spoiler) by Daniel (2006-12-02 19:35:42)
Some Thoughts solutions (spoiler) by Daniel (2006-12-02 12:38:25)
Difficulty: 3 of 5Under Numbers of letters of numbers of letters of... (in Sequences)
Posted on 2006-09-10 (15 Comments)
non convergence by Daniel (2006-09-10 11:04:27)
ordinal (other than english) by Daniel (2006-09-10 10:33:34)
cardinal english (spoiler) by Daniel (2006-09-10 10:09:54)
Difficulty: 2 of 5Under Seven powers of seven (in Numbers)
Posted on 2006-09-08 (3 Comments)
Some Thoughts interesting findings by Daniel (2006-09-08 18:11:09)
Difficulty: 4 of 5Under The gardener's woe is continuous (in Just Math)
Posted on 2006-08-30 (5 Comments)
re: Solution(?) by Daniel (2006-08-30 22:00:42)
Difficulty: 3 of 5Under A 2009 problem (in Just Math)
Posted on 2006-08-27 (5 Comments)
Some Thoughts further restrictions by Daniel (2006-08-27 22:14:38)
Some Thoughts mathematica code by Daniel (2006-08-27 11:32:59)
Difficulty: 2 of 5Under Five Circle Division (in Geometry)
Posted on 2006-08-26 (15 Comments)
new question by Daniel (2006-08-26 14:41:44)
Difficulty: 4 of 5Under Summing or Multiplying (in Numbers)
Posted on 2006-08-21 (20 Comments)
re(2): my not so simple solution -- OOPS! by Daniel (2006-08-22 06:05:03)
my not so simple solution by Daniel (2006-08-21 19:33:03)
Difficulty: 2 of 5Under A Real Number problem (in Just Math)
Posted on 2006-08-16 (9 Comments)
my solution by Daniel (2006-08-16 16:21:36)
Difficulty: 1 of 5Under What do I save? (in General)
Posted on 2006-08-11 (6 Comments)
re: multiple perspectives by Daniel (2006-08-11 08:47:23)
multiple perspectives by Daniel (2006-08-11 08:41:04)
Difficulty: 3 of 5Under A Multi-solution Puzzle (in Just Math)
Posted on 2006-08-03 (3 Comments)
what mathematica has to say by Daniel (2006-08-03 18:03:12)
Difficulty: 1 of 5Under Inequality (in Calculus)
Posted on 2006-08-03 (3 Comments)
my solution by Daniel (2006-08-03 20:18:03)
Difficulty: 3 of 5Under 3D Engineering problem (in Shapes)
Posted on 2006-08-02 (16 Comments)
re(2): a thought on part 1 by Daniel (2006-08-04 05:50:10)
a thought on part 1 by Daniel (2006-08-03 02:35:59)
Difficulty: 2 of 5Under Chess Strategy (in Logic)
Posted on 2006-08-01 (7 Comments)
probablistic proof :-D by Daniel (2006-08-01 09:14:46)
Difficulty: 3 of 5Under Tricky Ten Digit Number (in Numbers)
Posted on 2006-07-31 (10 Comments)
computer solution (spoiler) by Daniel (2006-07-31 13:06:01)
Difficulty: 3 of 5Under A deceiving riddle (in Riddles)
Posted on 2006-07-31 (36 Comments)
re(2): a heated answer by Daniel (2006-08-02 20:22:14)
a heated answer by Daniel (2006-07-31 09:37:34)
Difficulty: 3 of 5Under A Real Solution Puzzle (in Just Math)
Posted on 2006-07-30 (5 Comments)
solution with proof :-) by Daniel (2006-07-30 11:36:17)
Difficulty: 3 of 5Under Mine Detection (in Geometry)
Posted on 2006-07-29 (7 Comments)
interesting discovery by Daniel (2006-07-29 18:15:43)
possible proof by Daniel (2006-07-29 17:37:56)
re(2): a shorter one :-) by Daniel (2006-07-29 12:44:29)
a shorter one :-) by Daniel (2006-07-29 11:14:08)
get things started :-) by Daniel (2006-07-29 10:56:56)
Difficulty: 2 of 5Under A thing that nothing is (in Riddles)
Posted on 2006-07-25 (19 Comments)
answer (spoiler) by Daniel (2006-07-25 08:56:15)
Difficulty: 4 of 5Under Square-Crossed Power (in Just Math)
Posted on 2006-07-23 (11 Comments)
re(2): possible analytical solution by Daniel (2006-07-27 19:08:19)
analytical solution (repost) by Daniel (2006-07-25 19:15:34)
re(3): possible analytical solution (final fix) by Daniel (2006-07-24 22:32:13)
re(2): possible analytical solution (to clarify) by Daniel (2006-07-24 09:17:38)
possible analytical solution by Daniel (2006-07-23 19:08:38)
computer solution (spoiler) by Daniel (2006-07-23 11:05:49)
Difficulty: 4 of 5Under Two Digit Integers (in Just Math)
Posted on 2006-07-14 (11 Comments)
Computer Solution by Daniel (2006-07-14 13:04:05)
Difficulty: 3 of 5Under Time to run out water (in Science)
Posted on 2006-07-13 (11 Comments)
re(2): solution (maybe) (my bad) by Daniel (2006-07-14 06:03:37)
solution (maybe) by Daniel (2006-07-14 01:41:54)
Difficulty: 2 of 5Under tugged in all directions (in Riddles)
Posted on 2006-07-12 (6 Comments)
solution spoiler by Daniel (2006-07-12 19:02:12)
Difficulty: 3 of 5Under Multiplication Table (in Numbers)
Posted on 2006-07-07 (12 Comments)
another solution by Daniel (2006-07-07 16:32:07)
Difficulty: 1 of 5Under Old Mother Twitchett (in Famous Riddles)
Posted on 2006-07-06 (18 Comments)
answer (spoiler) by Daniel (2006-07-06 08:23:39)
Difficulty: 4 of 5Under Arrange The Disks (in General)
Posted on 2006-07-04 (14 Comments)
solution by Daniel (2006-07-04 11:51:22)
Difficulty: 2 of 5Under WWW (in Just Math)
Posted on 2006-07-04 (6 Comments)
solution by Daniel (2006-07-04 09:36:06)
Difficulty: 2 of 5Under A Clock Puzzle (in General)
Posted on 2006-07-01 (11 Comments)
Hints/Tips hint by Daniel (2006-07-01 08:26:50)
solution Spoiler by Daniel (2006-07-01 08:25:49)
Difficulty: 2 of 5Under A Digital Root Problem (in Just Math)
Posted on 2006-06-29 (10 Comments)
re: Difficulty by Daniel (2006-06-29 22:53:04)
Solution Spoiler by Daniel (2006-06-29 11:48:24)
Hint by Daniel (2006-06-29 11:43:35)
Difficulty: 3 of 5Under Further Arithmetic Integers (in Numbers)
Posted on 2006-06-27 (10 Comments)
genearl problem :-D by Daniel (2006-06-28 22:53:13)
mathematica solution (spoiler) by Daniel (2006-06-28 06:03:32)
Difficulty: 3 of 5Under 8 = 4 + 4 (in Numbers)
Posted on 2004-08-26 (11 Comments)
what mathematica has to say by Daniel (2006-07-30 22:08:40)
Difficulty: 3 of 5Under A Keg of Wine (in Just Math)
Posted on 2004-07-14 (26 Comments)
general exact solution by Daniel (2006-07-09 15:22:58)
Difficulty: 3 of 5Under Power - ful (in Just Math)
Posted on 2003-12-31 (11 Comments)
just how big is it by Daniel (2006-07-03 02:13:36)
Difficulty: 4 of 5Under Marbles Bonanza (in Paradoxes)
Posted on 2003-09-08 (83 Comments)
chasing infinity theory by Daniel (2006-07-03 20:08:52)
Difficulty: 4 of 5Under No Room at the Inn (in Liars and Knights)
Posted on 2003-06-25 (18 Comments)
alternative solution by Daniel (2006-07-31 04:40:49)
Difficulty: 4 of 5Under Location X (in Geometry)
Posted on 2003-05-05 (5 Comments)
where's the sign? by Daniel (2008-09-22 01:39:40)
Difficulty: 3 of 5Under Cleopatra and Marc Anthony (in Riddles)
Posted on 2003-04-22 (27 Comments)
re: Sounds like a retarded 3rd grader made this one by Daniel (2006-08-02 20:18:58)
Difficulty: 3 of 5Under Playing With Numbers (in Sequences)
Posted on 2003-04-16 (6 Comments)
Solution mathematica code (spoiler) by Daniel (2006-06-27 10:01:10)
Difficulty: 2 of 5Under Important Day (in Riddles)
Posted on 2002-12-29 (17 Comments)
STOP ALL THE VOTES!!!!! PLEASE READ!!! by Daniel (2006-06-29 08:53:29)
another possibility by Daniel (2006-06-29 08:31:19)
Difficulty: 3 of 5Under Make the most of these digits (in Numbers)
Posted on 2002-06-06 (48 Comments)
re: The challenge taken up.... by Daniel (2008-09-01 16:28:09)
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