Under Product of consecutive (in Just Math) Posted on 20240911 (3 Comments) 
 some by Charlie (20240911 09:48:31) 
Under Lunchtime Variety (in Logic) Posted on 20240909 (4 Comments) 
 re: some thoughts by Charlie (20240909 08:59:12) 
 some thoughts by Charlie (20240909 08:13:58) 
Under Is it Possible? (in Probability) Posted on 20240906 (5 Comments) 
 re: No Subject by Charlie (20240909 08:21:01) 
Under Secret Passages (in Cryptography) Posted on 20240906 (3 Comments) 
 computer solution by Charlie (20240906 10:17:05) 
Under Drinking logicians (in Logic) Posted on 20240904 (3 Comments) 
 probably by Charlie (20240904 11:04:20) 
Under Four Intersections (in Just Math) Posted on 20240903 (3 Comments) 
 re: A possible start by Charlie (20240904 07:17:28) 
Under Heptagony (in Numbers) Posted on 20240902 (2 Comments) 
 computeraided solution by Charlie (20240902 13:56:35) 
Under Arc Ratios (in Just Math) Posted on 20240902 (1 Comments) 
 solution by Charlie (20240902 09:16:51) 
Under A Divisibility Revelation (in Numbers) Posted on 20240828 (1 Comments) 
 solution by Charlie (20240828 11:57:46) 
Under Infinitely Summed NOD Function (in Numbers) Posted on 20240826 (2 Comments) 
 re: Solution by Charlie (20240827 07:00:07) 
Under Ten Words (7) (in Word Problems) Posted on 20240824 (2 Comments) 
 solution by Charlie (20240824 10:33:04) 
Under Catch the catch phrase (in Word Problems) Posted on 20240820 (4 Comments) 
 computeraided solution by Charlie (20240820 21:53:40) 
Under Exponentially Ascending (in Just Math) Posted on 20240820 (2 Comments) 
 solution by Charlie (20240820 10:57:01) 
Under Coded Crossword 5 (in Cryptography) Posted on 20240817 (7 Comments) 
 making it look more like conventional cryptograms by Charlie (20240818 08:21:19) 
Under Geometry Charm in an Isosceles Triangle (in Geometry) Posted on 20240815 (2 Comments) 
 proposed solution by Charlie (20240815 09:17:10) 
Under Multiplication Crossed Unknown Digits Muse (in Numbers) Posted on 20240809 (2 Comments) 
 solution by Charlie (20240809 11:43:17) 
Under Best First Two WORDLE Guesses (in Word Problems) Posted on 20240807 (3 Comments) 
 Some word pairs in context. by Charlie (20240807 10:52:27) 
Under Magic Bunny Power (in Probability) Posted on 20240804 (7 Comments) 
 computer exploration by Charlie (20240804 13:00:06) 
Under Freddy's Footpath (in Just Math) Posted on 20240804 (1 Comments) 
 solution by Charlie (20240804 08:48:39) 
Under Is it a Bird .....Is it a Plane..... It's #2 (in Riddles) Posted on 20240803 (2 Comments) 
 idea by Charlie (20240803 10:05:34) 
Under Rectangular Floor (in Numbers) Posted on 20240801 (2 Comments) 
 solution by Charlie (20240801 09:26:45) 
Under Around the World in 80 Hours (in Geometry) Posted on 20240730 (4 Comments) 
 re: Possible solution by Charlie (20240730 12:02:27) 
Under Chatty Classmates (in Just Math) Posted on 20240729 (3 Comments) 
 re: Different answer by Charlie (20240729 11:10:40) 
 Solution (spoiler) by Charlie (20240729 08:06:27) 
Under Sum of Three Squares (in Numbers) Posted on 20240727 (2 Comments) 
 computer solution (spoiler) by Charlie (20240727 08:12:31) 
Under Squexagon! (in Just Math) Posted on 20240722 (3 Comments) 
 solution by Charlie (20240722 12:38:45) 
Under 99 Rods #1 (in Numbers) Posted on 20240721 (5 Comments) 
 re(2): some thoughts by Charlie (20240723 06:47:34) 
 A start but not the answer by Charlie (20240721 10:50:12) 
Under Divisibility of 8 (in Numbers) Posted on 20240720 (2 Comments) 
 solution by Charlie (20240720 10:25:31) 
Under Chessboard Squares Lying On The Same Diagonal (in Probability) Posted on 20240718 (2 Comments) 
 solution by Charlie (20240718 15:41:57) 
Under Vaivém Numbers (in Numbers) Posted on 20240713 (3 Comments) 
 solution by Charlie (20240713 10:53:49) 
Under A Prime Time #2 (in Numbers) Posted on 20240712 (2 Comments) 
 Monte Carlo method by Charlie (20240713 09:20:13) 
Under Seven Consonants in a row (in Word Problems) Posted on 20240709 (2 Comments) 
 computer exploration by Charlie (20240710 06:47:26) 
Under The Folding Ruler #2 (in Shapes) Posted on 20240708 (2 Comments) 
 re: solution by Charlie (20240708 09:47:29) 
 solution by Charlie (20240708 08:03:52) 
Under A 12 Number (in Numbers) Posted on 20240707 (4 Comments) 
 computer solution by Charlie (20240707 09:15:52) 
Under Cubic Lattice (in Probability) Posted on 20240703 (3 Comments) 
 re: expanded table using OEIS  a caveat by Charlie (20240704 08:26:37) 
 expanded table using OEIS by Charlie (20240704 08:14:52) 
 solution by Charlie (20240704 07:31:17) 
Under Unit square overlap III (in Calculus) Posted on 20240703 (3 Comments) 
 solution by Charlie (20240703 13:42:53) 
Under Prime Symphony (in Just Math) Posted on 20240701 (5 Comments) 
 computer solution by Charlie (20240701 13:47:53) 
Under Traditional Soccer Ball (in Shapes) Posted on 20240628 (7 Comments) 
 re(3): Solution by Charlie (20240630 07:15:55) 
 re: Solution by Charlie (20240629 13:29:00) 
Under Four Fives (in Numbers) Posted on 20240628 (1 Comments) 
 solution by Charlie (20240628 10:05:45) 
Under Sixtythree (in Numbers) Posted on 20240627 (2 Comments) 
 Proposed solution by Charlie (20240628 00:01:16) 
Under The Folding Ruler (in Shapes) Posted on 20240627 (3 Comments) 
 computer solution by Charlie (20240628 10:56:22) 
Under Random Point Within a Regular Pentagon (in General) Posted on 20240622 (2 Comments) 
 analytic solution by Charlie (20240623 17:07:53) 
Under Four Consecutive Odds (in Numbers) Posted on 20240621 (3 Comments) 
 computer solution by Charlie (20240621 10:21:45) 
Under Point relation in a square (in Geometry) Posted on 20240620 (3 Comments) 
 solution by Charlie (20240620 12:28:29) 
Under Composing Composites (in Numbers) Posted on 20240617 (4 Comments) 
 proposed computer solution by Charlie (20240618 06:57:53) 
Under Sine River 2 (in Just Math) Posted on 20240617 (2 Comments) 
 solution by Charlie (20240617 15:08:21) 
Under A Fraction With Exponential Expressions (in Just Math) Posted on 20240616 (3 Comments) 
 solution by Charlie (20240616 14:45:51) 
Under Sine River (in Just Math) Posted on 20240614 (5 Comments) 
 re: computer solution  an aside by Charlie (20240614 22:10:02) 
 re: computer solution  an aside by Charlie (20240614 22:10:02) 
 computer solution by Charlie (20240614 13:11:51) 
Under Maximizing Complex Ratios (in Just Math) Posted on 20240614 (3 Comments) 
 computer solution by Charlie (20240614 09:35:05) 
Under Six Unit Squares (in Shapes) Posted on 20240612 (4 Comments) 
 solution by Charlie (20240613 07:22:25) 
Under George's Security Number (in Numbers) Posted on 20240612 (19 Comments) 
 computer solution by Charlie (20240612 13:49:26) 
Under Boy born on a Tuesday (in Probability) Posted on 20240612 (3 Comments) 
 surprising computer solution by Charlie (20240612 10:29:33) 
Under Divide by 2 indefinitely, get result (in Calculus) Posted on 20240611 (4 Comments) 
 solution by Charlie (20240611 21:47:00) 
Under Inscribed Octagon (in Geometry) Posted on 20240611 (3 Comments) 
 computeraided solution by Charlie (20240611 12:44:37) 
Under Island Dining Drama (in Just Math) Posted on 20240611 (4 Comments) 
 solution by Charlie (20240611 09:11:41) 
Under Sabroso numbers (in Numbers) Posted on 20240610 (3 Comments) 
 tabularion by Charlie (20240610 13:26:36) 
Under Hollow Tetrahedron Conundrum (in Shapes) Posted on 20240610 (2 Comments) 
 more exact answerless programming by Charlie (20240610 10:53:02) 
 computeraided solution by Charlie (20240610 09:24:14) 
Under Handshakes #2 (in Numbers) Posted on 20240608 (4 Comments) 
 computer findings by Charlie (20240608 21:57:54) 
Under Web Counter (in Numbers) Posted on 20240608 (3 Comments) 
 re(2): some computer findings by Charlie (20240608 13:08:23) 
 re: some computer findings by Charlie (20240608 12:27:31) 
 some computer findings by Charlie (20240608 11:57:36) 
Under The Case of the Powerful 2 and 3 (in Just Math) Posted on 20240607 (3 Comments) 
 No Subject by Charlie (20240607 14:36:59) 
Under Unit Cubes (in Shapes) Posted on 20240606 (2 Comments) 
 Part 2 only by Charlie (20240606 09:22:00) 
Under Tetrahedron ratio range (in Shapes) Posted on 20240605 (3 Comments) 
 proposed solution by Charlie (20240605 20:23:55) 
Under Squaresum fraction (in Just Math) Posted on 20240604 (4 Comments) 
 computer solution by Charlie (20240605 06:04:18) 
Under Prime centuries (in Numbers) Posted on 20240604 (1 Comments) 
 computer solution (spoiler) by Charlie (20240604 14:16:18) 
Under Digit Powers (in Numbers) Posted on 20240604 (1 Comments) 
 computer exploration by Charlie (20240604 09:52:30) 
Under A point in a hexagon (in Just Math) Posted on 20240603 (4 Comments) 
 solution by Charlie (20240603 09:57:55) 
Under N+1 to N+5 (in Numbers) Posted on 20240530 (3 Comments) 
 computer solution by Charlie (20240530 22:51:49) 
Under Peeling Primes (in Numbers) Posted on 20240530 (3 Comments) 
 computer exploration by Charlie (20240530 09:02:46) 
Under Odd Determinants of a Square Array (in Just Math) Posted on 20240529 (7 Comments) 
 re(2): Computer Solution by Charlie (20240529 16:18:03) 
 re: Computer Solution by Charlie (20240529 15:58:09) 
 A different answer by Charlie (20240529 15:17:01) 
Under Factorials (in Numbers) Posted on 20240529 (2 Comments) 
 solution (spoiler) by Charlie (20240529 10:38:59) 
Under Binary Decimal (in Numbers) Posted on 20240527 (1 Comments) 
 computer solution by Charlie (20240527 14:00:22) 
Under Product in calendar (in Just Math) Posted on 20240527 (3 Comments) 
 computer solution by Charlie (20240527 09:38:50) 
Under Geometric Configuration in a Regular Hexagon (in Geometry) Posted on 20240526 (2 Comments) 
 solution by Charlie (20240526 13:09:10) 
Under Numbers and their inversions (in Numbers) Posted on 20240523 (5 Comments) 
 computer solution by Charlie (20240523 23:18:04) 
Under An Infinite Lattice of Points (in Probability) Posted on 20240523 (2 Comments) 
 solution  simulation and research by Charlie (20240523 12:23:44) 
Under Skating Dynamics (in Just Math) Posted on 20240523 (3 Comments) 
 solutions by Charlie (20240523 09:14:25) 
Under Five Letters Minus Two Consecutive Letters (in Word Problems) Posted on 20240522 (2 Comments) 
 re: Table of word/letter pair values  by group by Charlie (20240522 09:21:52) 
 Table of word/letter pair values  may be of use by Charlie (20240522 09:09:08) 
Under 4 basic operations (in Just Math) Posted on 20240521 (10 Comments) 
 re: Puzzle Thoughts by Charlie (20240521 09:54:03) 
 computer solution by Charlie (20240521 09:20:54) 
Under Aleph_{0} (in Numbers) Posted on 20240520 (4 Comments) 
 re: Estimates by Charlie (20240520 16:26:55) 
Under Given Linear Sum, Find the Sum of Exponents (in Just Math) Posted on 20240519 (3 Comments) 
 by graphing by Charlie (20240519 08:53:34) 
Under Real Crossed Exponential Puzzle (in Just Math) Posted on 20240518 (2 Comments) 
 proposed solution by Charlie (20240518 21:32:34) 
Under Permutations and Remainders (in Just Math) Posted on 20240517 (4 Comments) 
 computer solution by Charlie (20240517 13:10:26) 
Under Consecutive Side Conundrum (in Just Math) Posted on 20240515 (4 Comments) 
 computeraided solution by Charlie (20240515 12:04:40) 
Under Exploring Brahmagupta's Formula (in Just Math) Posted on 20240513 (2 Comments) 
 per Brahmagupta by Charlie (20240513 17:11:37) 
Under Mileage #2 (in Numbers) Posted on 20240511 (2 Comments) 
 re: No Subject by Charlie (20240512 17:09:15) 
 No Subject by Charlie (20240511 15:11:17) 
Under All Combos 2 (in Probability) Posted on 20240510 (3 Comments) 
 solutions by Charlie (20240510 14:32:53) 
Under Given the terms, find the Fraction Value (in Just Math) Posted on 20240510 (3 Comments) 
 computer exploration by Charlie (20240510 10:29:44) 
Under All Combos (in Numbers) Posted on 20240508 (2 Comments) 
 computer solution by Charlie (20240508 09:17:31) 
Under Four Triangles (in Numbers) Posted on 20240506 (7 Comments) 
 computer solution by Charlie (20240506 09:51:24) 
Under Outside the Pentagon (in Just Math) Posted on 20240505 (5 Comments) 
 solution by Charlie (20240505 14:06:25) 
Under Real Values Crossed Four Power Puzzle (in Numbers) Posted on 20240505 (4 Comments) 
 logarithmically by Charlie (20240505 09:35:40) 
Under Given Real Numbers, Find all possible Sums (in Just Math) Posted on 20240504 (2 Comments) 
 solution (spoiler) by Charlie (20240504 09:00:34) 
Under October and 11 Prime Numbers (in Numbers) Posted on 20240503 (2 Comments) 
 computer solution by Charlie (20240503 12:54:38) 
Under A prime GCD adventure (in Just Math) Posted on 20240503 (6 Comments) 
 I don't know the interpretation. by Charlie (20240503 11:10:23) 
Under Working together? (in Word Problems) Posted on 20240502 (7 Comments) 
 solving one with multiple solutions by Charlie (20240502 11:27:39) 
 computer solution by Charlie (20240502 09:35:21) 
Under Sphere Circumscribing Tetrahedron (in Shapes) Posted on 20240430 (4 Comments) 
 spherical trig and varying r by Charlie (20240430 12:15:00) 
Under Divisible by Length (in Numbers) Posted on 20240427 (5 Comments) 
 computer solution by Charlie (20240427 14:22:07) 
Under Find the real number (in Just Math) Posted on 20240425 (5 Comments) 
 computer solution by Charlie (20240426 07:39:18) 
Under Digits of N^3 (in Numbers) Posted on 20240425 (2 Comments) 
 computer solution by Charlie (20240425 09:09:26) 
Under Closest to two dozens (in Word Problems) Posted on 20240424 (20 Comments) 
 re(2): re 24 by Charlie (20240428 07:38:01) 
 re(3): stats by Charlie (20240426 10:47:42) 
 re(2): stats by Charlie (20240426 07:27:32) 
 stats by Charlie (20240425 21:48:42) 
 a little more concrete by Charlie (20240425 18:54:13) 
 re: @ Charlie & Larry by Charlie (20240425 18:00:52) 
 re: Uniqueness? by Charlie (20240425 17:51:11) 
 re(2): Puzzle Thoughts  disregarding the words by Charlie (20240425 07:42:28) 
 computer solution by Charlie (20240424 18:25:50) 
Under Block Distribution (in Numbers) Posted on 20240423 (4 Comments) 
 re: Computer solution by Charlie (20240423 23:09:25) 
 computeraided solution by Charlie (20240423 14:49:10) 
Under Complex Roots Unleashed (in Just Math) Posted on 20240423 (7 Comments) 
 computer solution by Charlie (20240423 11:14:35) 
Under Given Sum of fractions, Find the Minimum (in Just Math) Posted on 20240421 (2 Comments) 
 graph and zoom by Charlie (20240421 09:23:14) 
Under Maximus (in Logic) Posted on 20240420 (7 Comments) 
 re: Solution by Charlie (20240420 11:59:02) 
 computer solution by Charlie (20240420 11:06:56) 
Under Wellknown French Name (in Numbers) Posted on 20240419 (5 Comments) 
 re: Lancelot by Charlie (20240429 21:18:15) 
 computer findings by Charlie (20240419 14:26:40) 
 Unusual circumstance by Charlie (20240419 12:33:51) 
Under A quick inverse (in Just Math) Posted on 20240419 (1 Comments) 
 solution by Charlie (20240419 09:58:55) 
Under The tricky substitution (in Just Math) Posted on 20240418 (3 Comments) 
 FWIW, Computer Solution (spoiler) by Charlie (20240418 15:47:42) 
Under Cubic Diophantine (in Numbers) Posted on 20240418 (2 Comments) 
 computer solution by Charlie (20240418 08:57:42) 
Under Red and Yellow (in Probability) Posted on 20240416 (7 Comments) 
 re(2): some exceptions by Charlie (20240417 07:48:18) 
 some exceptions by Charlie (20240416 15:24:43) 
Under The Floor Equation (in Just Math) Posted on 20240416 (2 Comments) 
 proposed solution by Charlie (20240416 11:12:52) 
Under Digit Increments 2 (in Numbers) Posted on 20240415 (3 Comments) 
 computer solution by Charlie (20240415 08:56:59) 
Under Counting Trapeziums in Regular Polygons (in Just Math) Posted on 20240412 (4 Comments) 
 computer exploration by Charlie (20240412 14:45:40) 
Under Digital Product Triples #2 (in Numbers) Posted on 20240411 (1 Comments) 
 computer solution by Charlie (20240411 13:35:10) 
Under Alldistinctinteger set (in Numbers) Posted on 20240411 (2 Comments) 
 solution by Charlie (20240411 08:45:46) 
Under A cube within a cone (in Just Math) Posted on 20240410 (2 Comments) 
 solution by Charlie (20240410 09:18:54) 
Under Exploring Coprime Roots in Quadratic Equations (in Just Math) Posted on 20240409 (7 Comments) 
 re(2): by Charlie (20240410 09:20:18) 
Under In or out? (in Probability) Posted on 20240409 (2 Comments) 
 solution by Charlie (20240409 08:39:57) 
Under Number of Zero Digits (in Algorithms) Posted on 20240407 (3 Comments) 
 No Subject by Charlie (20240407 15:05:19) 
Under How many zeros does this end in? (in Numbers) Posted on 20240405 (4 Comments) 
 expanding by Charlie (20240405 12:51:10) 
Under Some Factorials Equal Score Exponent (in Just Math) Posted on 20240404 (3 Comments) 
 Summary of solutions by Charlie (20240404 21:23:00) 
 integral value and real  a sampling by Charlie (20240404 09:38:59) 
Under Unequal tetrahedron (in Shapes) Posted on 20240402 (7 Comments) 
 re: Solution by Charlie (20240402 14:55:57) 
 what I get by Charlie (20240402 14:54:26) 
Under Squeeze in II (in Just Math) Posted on 20240401 (8 Comments) 
 proposed solution by Charlie (20240401 09:58:11) 
Under Equilateral triangle by distances (in Shapes) Posted on 20240329 (5 Comments) 
 re(2): Thoughts by Charlie (20240401 16:12:02) 
 computer solution by Charlie (20240329 13:30:11) 
Under A Riddle for the Ages (in Just Math) Posted on 20240329 (4 Comments) 
 solution by Charlie (20240329 10:13:27) 
Under Evaluate area (in Just Math) Posted on 20240328 (3 Comments) 
 Monte Carlo method by Charlie (20240328 19:53:08) 
 solution by Charlie (20240328 13:34:40) 
Under Sum of distinct digit number (in Just Math) Posted on 20240328 (4 Comments) 
 solution by Charlie (20240328 09:25:17) 
Under Cables II (in Tricks) Posted on 20240327 (2 Comments) 
 solution by Charlie (20240327 14:20:36) 
Under Maximizing products (in Just Math) Posted on 20240326 (5 Comments) 
 solution by Charlie (20240326 14:04:32) 
Under BestOfFive (in General) Posted on 20240325 (3 Comments) 
 computeraided solution by Charlie (20240325 10:27:04) 
Under 3 3s times 3 3s has 9 9s (in Numbers) Posted on 20240324 (3 Comments) 
 solution by Charlie (20240324 10:10:05) 
Under Cables (in General) Posted on 20240322 (4 Comments) 
 No Subject by Charlie (20240322 14:15:10) 
Under Cube Arranger (in Numbers) Posted on 20240322 (3 Comments) 
 computer solution by Charlie (20240322 10:00:23) 
Under Counting Partitions (in Just Math) Posted on 20240321 (3 Comments) 
 re: solution by Charlie (20240321 16:25:09) 
 solution by Charlie (20240321 13:45:01) 
Under Odd divisor summation (in Just Math) Posted on 20240321 (4 Comments) 
 computer solution by Charlie (20240321 10:10:50) 
Under Chests (in Logic) Posted on 20240320 (4 Comments) 
 re: simulation by Charlie (20240320 13:44:45) 
 simulation by Charlie (20240320 13:24:49) 
 re: a start for a way to go by Charlie (20240320 08:19:51) 
 a start for a way to go by Charlie (20240320 07:35:38) 
Under Plug (in General) Posted on 20240319 (3 Comments) 
 solution by Charlie (20240319 13:18:17) 
Under Taking the Long Shot (in Probability) Posted on 20240318 (1 Comments) 
 solution by Charlie (20240318 12:05:01) 
Under Election (in General) Posted on 20240317 (4 Comments) 
 thoughts by Charlie (20240317 09:03:14) 
Under Averaging factorials (in Just Math) Posted on 20240316 (2 Comments) 
 thoughts and calculations by Charlie (20240316 13:20:43) 
Under Hitter's Duel (in General) Posted on 20240316 (5 Comments) 
 solution by Charlie (20240316 09:15:54) 
Under Power Digits (in Numbers) Posted on 20240315 (6 Comments) 
 different algorithm to find the numbers by Charlie (20240316 08:13:30) 
 re: Some numbers but without a proof by Charlie (20240315 18:16:24) 
Under Three Concatenations (in Numbers) Posted on 20240315 (4 Comments) 
 computer solution by Charlie (20240315 10:48:05) 
Under Nonconformist choice (in Probability) Posted on 20240314 (4 Comments) 
 solution by Charlie (20240314 09:05:26) 
Under The Second Visit (in General) Posted on 20240313 (4 Comments) 
 computer solution (spoiler) by Charlie (20240313 11:32:37) 
Under Semi1 number (in Just Math) Posted on 20240313 (3 Comments) 
 computer exploration plus analytic limit by Charlie (20240313 08:34:52) 
Under Square Digits (in Numbers) Posted on 20240312 (7 Comments) 
 solution by Charlie (20240312 12:18:46) 
Under Find This Limit (in Calculus) Posted on 20240310 (4 Comments) 
 computer solution by Charlie (20240310 09:02:12) 
Under Deciphering the Duel (in Just Math) Posted on 20240309 (3 Comments) 
 computer solution by Charlie (20240309 12:29:50) 
Under Rich Uncle (in Numbers) Posted on 20240308 (1 Comments) 
 possible solution by Charlie (20240308 13:26:28) 
Under Three Accountants Crossed Four Numbers Puzzle (in Numbers) Posted on 20240308 (1 Comments) 
 computeraided solution by Charlie (20240308 11:07:50) 
Under Constrained triangle (in Just Math) Posted on 20240307 (3 Comments) 
 solution by Charlie (20240307 09:37:02) 
Under Differences (in Numbers) Posted on 20240306 (3 Comments) 
 possible solution by Charlie (20240306 09:15:31) 
Under Altering Pickup Routine (in Just Math) Posted on 20240305 (2 Comments) 
 solution by Charlie (20240305 11:54:50) 
Under Define a rational function (in Probability) Posted on 20240304 (5 Comments) 
 solution by Charlie (20240304 13:28:43) 
Under Row of towers, Part 2 (in Probability) Posted on 20240301 (4 Comments) 
 solution by Charlie (20240301 13:19:50) 
Under tetrahedron contained in a sphere (in Shapes) Posted on 20240229 (5 Comments) 
 solution by Charlie (20240229 14:25:31) 
Under Non Prime Integer Inquiry (in Just Math) Posted on 20240229 (3 Comments) 
 computer solution by Charlie (20240229 08:13:23) 
Under Pythagorean Triples #3 (in Numbers) Posted on 20240228 (2 Comments) 
 computer exploration by Charlie (20240228 13:58:55) 
Under Mostly 52 (in Probability) Posted on 20240227 (5 Comments) 
 re(2): solution by Charlie (20240301 07:46:08) 
 solution by Charlie (20240228 08:17:17) 
Under Second derivative of a cosine product (in Calculus) Posted on 20240227 (5 Comments) 
 computer solution (spoiler) by Charlie (20240227 12:18:43) 
Under Atbash Self Referential Number (in Numbers) Posted on 20240227 (4 Comments) 
 computer solution by Charlie (20240227 08:33:36) 
Under Who wins? 2 (in Probability) Posted on 20240226 (3 Comments) 
 re: Solution by Charlie (20240226 12:21:41) 
Under Some Sum of 2 Powers is a Perfect Square (in Numbers) Posted on 20240226 (2 Comments) 
 computer solution by Charlie (20240226 10:11:54) 
Under Row of towers (in Shapes) Posted on 20240223 (5 Comments) 
 re: Formula by Charlie (20240224 07:51:09) 
 computeraided solution by Charlie (20240223 13:01:43) 
Under Find all possible values of x (in Just Math) Posted on 20240223 (2 Comments) 
 solution by Charlie (20240223 08:27:16) 
Under Multiples of 6 (in Probability) Posted on 20240222 (9 Comments) 
 re(3): Benford's Law by Charlie (20240222 21:54:26) 
Under An unlikely solution! (in Just Math) Posted on 20240221 (4 Comments) 
 No Subject by Charlie (20240221 23:06:05) 
Under Ellipse covered by 2 circles (in Calculus) Posted on 20240221 (3 Comments) 
 solution by Charlie (20240221 08:10:04) 
Under Distinct Powers (in Numbers) Posted on 20240220 (3 Comments) 
 computer solution by Charlie (20240220 11:55:58) 
Under Find Last 3 Digits (in Just Math) Posted on 20240220 (4 Comments) 
 re(2): computeraided solution by Charlie (20240220 11:03:22) 
 computeraided solution by Charlie (20240220 09:12:15) 
Under Helping without trig (in Just Math) Posted on 20240219 (5 Comments) 
 re(2): solution by Charlie (20240219 18:17:47) 
 solution by Charlie (20240219 13:44:47) 
Under Polygon Perimeter (in Just Math) Posted on 20240219 (4 Comments) 
 finding the perimeter by Charlie (20240219 09:04:33) 
Under 3 Cubes #2 (in Numbers) Posted on 20240218 (4 Comments) 
 computer solution by Charlie (20240218 13:39:36) 
Under Define the members of S (in Just Math) Posted on 20240218 (3 Comments) 
 re: flawed program, but some ideas by Charlie (20240218 10:32:33) 
 flawed program, but some ideas by Charlie (20240218 10:22:37) 
Under Prime Pairs satisfy Quintic = Cubic (in Numbers) Posted on 20240217 (7 Comments) 
 probable solution by Charlie (20240217 15:52:16) 
Under Prime Digit Replacements (in Numbers) Posted on 20240216 (4 Comments) 
 Just a comment! by Charlie (20240216 11:51:25) 
Under Multiplication Includes All Digits (in Numbers) Posted on 20240216 (4 Comments) 
 computer solution by Charlie (20240216 10:07:34) 
Under Remainder Reckoning (in Numbers) Posted on 20240215 (3 Comments) 
 computer solution by Charlie (20240215 10:39:10) 
Under cosine equated to polynomial (in Just Math) Posted on 20240213 (3 Comments) 
 solution by Charlie (20240213 07:50:11) 
Under Equal cubic roots (in Just Math) Posted on 20240212 (3 Comments) 
 solution by Charlie (20240212 12:57:56) 
Under Not equal but fair (in Just Math) Posted on 20240212 (5 Comments) 
 re(2): computer solution by Charlie (20240213 08:08:11) 
 computer solution by Charlie (20240212 09:30:31) 
Under 1,000,000 doors (in Numbers) Posted on 20240211 (1 Comments) 
 solution by Charlie (20240211 08:40:31) 
Under Quadratic Primes (in Numbers) Posted on 20240207 (2 Comments) 
 computer solution by Charlie (20240207 14:34:58) 
Under Some special states (in Word Problems) Posted on 20240206 (6 Comments) 
 computer solution by Charlie (20240206 19:09:16) 
Under Hyperbolic center (in Just Math) Posted on 20240206 (3 Comments) 
 solution by Charlie (20240206 12:33:07) 
Under A perfect appearance (in Probability) Posted on 20240206 (2 Comments) 
 solution by Charlie (20240206 08:29:36) 
Under Quadratic Function Determination (in Just Math) Posted on 20240202 (4 Comments) 
 Using Wolfram Alpha by Charlie (20240202 11:07:30) 
Under Neponacci. (in Numbers) Posted on 20240201 (3 Comments) 
 re: Possible issue by Charlie (20240202 11:31:53) 
 computer solution by Charlie (20240201 13:30:52) 
Under The Right Key (in Logic) Posted on 20240201 (6 Comments) 
 off topic by Charlie (20240201 10:46:29) 
 computer solution by Charlie (20240201 08:59:37) 
Under Pythagorean Triples #1 (in Numbers) Posted on 20240131 (2 Comments) 
 computer solution by Charlie (20240131 13:57:22) 
Under Difference of Two Expressions equal n (in Just Math) Posted on 20240130 (1 Comments) 
 answer by Charlie (20240130 13:37:21) 
Under The First Lady (in Probability) Posted on 20240130 (12 Comments) 
 re: Perfect Shuffle by Charlie (20240130 10:01:11) 
 re: computer solution by Charlie (20240130 09:41:33) 
 computer solution by Charlie (20240130 09:23:01) 
Under Red and Blue chips (in Just Math) Posted on 20240128 (3 Comments) 
 solution by Charlie (20240128 11:22:18) 
Under Picking boxes (in Just Math) Posted on 20240128 (5 Comments) 
 computer solution by Charlie (20240128 10:33:05) 
Under Region Area Ascertainment 2 (in Shapes) Posted on 20240127 (6 Comments) 
 solution by Charlie (20240127 09:56:53) 
Under Find the possible values of a*b. (in Just Math) Posted on 20240126 (2 Comments) 
 possible solution by Charlie (20240126 11:43:54) 
Under Permutation (in Numbers) Posted on 20240124 (5 Comments) 
 re(2): solution by Charlie (20240124 16:43:07) 
 solution by Charlie (20240124 09:07:22) 
Under Foreheads (in Numbers) Posted on 20240122 (3 Comments) 
 computeraided solution by Charlie (20240122 09:10:25) 
Under Cube + Single Digit = Perfect Square (in Numbers) Posted on 20240121 (2 Comments) 
 computer solution by Charlie (20240121 12:39:47) 
Under RoseInnes are Squares (in Numbers) Posted on 20240121 (2 Comments) 
 computer solution by Charlie (20240121 10:21:13) 
Under Power Heronian (in Numbers) Posted on 20240119 (1 Comments) 
 computer solution by Charlie (20240119 10:36:20) 
Under Tripartite words (in Logic) Posted on 20240116 (5 Comments) 
 re(2): longer list continued by Charlie (20240117 08:32:54) 
 re: longer list continued by Charlie (20240117 08:31:52) 
 longer list by Charlie (20240117 08:30:15) 
 the short list by Charlie (20240117 08:26:36) 
Under Two arithmetic sequences (in Numbers) Posted on 20240116 (4 Comments) 
 a different interpretation by Charlie (20240116 15:09:50) 
Under Double number digit sum (in Numbers) Posted on 20240116 (3 Comments) 
 computer solution by Charlie (20240116 08:41:18) 
Under Triangle's features (in Geometry) Posted on 20240115 (5 Comments) 
 Partial answer by Charlie (20240115 18:24:12) 
Under Each of the 9 Words is a Perfect Square (in Numbers) Posted on 20240115 (2 Comments) 
 computer solution by Charlie (20240115 08:37:02) 
Under That’s ENTERTAINMENT (in Word Problems) Posted on 20240114 (5 Comments) 
 computer solution by Charlie (20240114 08:32:37) 
Under Alphabetic Order (in General) Posted on 20240113 (3 Comments) 
 an attempt by Charlie (20240113 07:44:05) 
Under LCM and GCD Crossed Value Derivation (in Just Math) Posted on 20240111 (3 Comments) 
 computer findings by Charlie (20240111 08:57:47) 
Under Mr. S and Mr. P (in Numbers) Posted on 20240108 (4 Comments) 
 re(2): Clarification needed (Question) by Charlie (20240108 13:43:04) 
Under Find the Last Two Digits (in Numbers) Posted on 20240107 (2 Comments) 
 computer solution by Charlie (20240107 09:07:39) 
Under What Are These Numbers? (in Numbers) Posted on 20240106 (2 Comments) 
 computer solution by Charlie (20240106 09:35:12) 
Under Nonnegative Integer Crossed Prime Puzzle (in Numbers) Posted on 20240105 (6 Comments) 
 computer explorationno proof of completeness by Charlie (20240105 08:55:30) 
Under Area / Perimeter Ratio (in Numbers) Posted on 20240104 (5 Comments) 
 partial solution by Charlie (20240104 08:56:35) 
Under Square Heronian (in Shapes) Posted on 20240102 (1 Comments) 
 computer attempt; researched answer (spoiler) by Charlie (20240102 13:26:33) 
Under Two Candles (in General) Posted on 20240102 (4 Comments) 
 solution by Charlie (20240102 08:57:01) 
Under Words like swords (in Word Problems) Posted on 20240101 (4 Comments) 
 From the SyFy network by Charlie (20240101 19:40:38) 
 Two famous sayings that might qualify. by Charlie (20240101 08:22:00) 
Under Pete and Jimmy (in Probability) Posted on 20231229 (8 Comments) 
 computer solution by Charlie (20231229 13:11:42) 
Under Triangular Cube (in Numbers) Posted on 20231229 (2 Comments) 
 computer solution by Charlie (20231229 08:56:36) 
Under Total Number of Real Solutions (in Just Math) Posted on 20231228 (2 Comments) 
 the number, and the solution by Charlie (20231228 09:17:28) 
Under Square root and cubic root equality (in Just Math) Posted on 20231227 (4 Comments) 
 re: Solution by Charlie (20231227 07:52:07) 
 solution by Charlie (20231227 07:42:48) 
Under Filtering a phrase (in Word Problems) Posted on 20231225 (3 Comments) 
 computer solution by Charlie (20231225 19:38:26) 
Under Solving a System of Equations with Real Numbers (in Just Math) Posted on 20231225 (2 Comments) 
 solve with Wolfram Alpha by Charlie (20231225 13:12:27) 
Under Consecutive (in Sequences) Posted on 20231225 (2 Comments) 
 computer solution by Charlie (20231225 09:00:01) 
Under Piling Stones (in Just Math) Posted on 20231223 (8 Comments) 
 solution by Charlie (20231223 13:32:21) 
Under 2 Power Crossed Perfect Power Puzzle (in Numbers) Posted on 20231223 (4 Comments) 
 re: Analytic solution by Charlie (20231223 11:40:18) 
 computer solution by Charlie (20231223 09:46:14) 
Under Cyclic maximization (in Just Math) Posted on 20231221 (2 Comments) 
 computer solution by Charlie (20231221 09:27:01) 
Under Consecutive cosines (in Just Math) Posted on 20231220 (1 Comments) 
 observation  probably obvious  not a proof by Charlie (20231220 11:23:04) 
Under Given Leaning Ladder, Get the Base (in Shapes) Posted on 20231219 (1 Comments) 
 solution by Charlie (20231219 09:30:55) 
Under Add to Cube, get Square 2 (in Numbers) Posted on 20231218 (1 Comments) 
 computer solution by Charlie (20231218 12:38:20) 
Under 100 times a Sawtooth Integral (in Calculus) Posted on 20231218 (3 Comments) 
 comment by Charlie (20231218 09:24:30) 
Under People (in Word Problems) Posted on 20231217 (20 Comments) 
 #8 even with only one S by Charlie (20231218 12:33:13) 
 #1 by Charlie (20231218 12:16:13) 
 2 by Charlie (20231218 12:06:59) 
Under Square and Prime (in Numbers) Posted on 20231216 (2 Comments) 
 computer solution by Charlie (20231216 13:32:41) 
Under Testing Time Treat (in Probability) Posted on 20231215 (3 Comments) 
 solution by Charlie (20231215 13:46:03) 
Under Old Foskins (in General) Posted on 20231214 (7 Comments) 
 most likely answer by Charlie (20231214 14:13:49) 
Under Square the GCD, get the Sum (in Numbers) Posted on 20231213 (1 Comments) 
 computer findings by Charlie (20231214 08:11:43) 
Under 200 Candies (in General) Posted on 20231212 (9 Comments) 
 re: simulation with new interpretation by Charlie (20231213 15:26:03) 
 simulation with new interpretation by Charlie (20231213 07:46:47) 
 re(2): simulation by Charlie (20231212 19:27:00) 
 simulation by Charlie (20231212 14:32:28) 
Under Infinitely Continued String of Perfect Cubes (in Numbers) Posted on 20231212 (2 Comments) 
 computer solution by Charlie (20231212 09:31:47) 
Under Year Yearn 6 (in Numbers) Posted on 20231211 (2 Comments) 
 computer solution by Charlie (20231211 08:32:07) 
Under Some Powers Sum 328 (in Numbers) Posted on 20231210 (4 Comments) 
 computer solution by Charlie (20231210 09:52:24) 
Under Triple angle perimeter minimized (in Geometry) Posted on 20231208 (2 Comments) 
 computer solution by Charlie (20231208 08:48:07) 
Under Bug on a Cube 3 (in Probability) Posted on 20231205 (3 Comments) 
 computer solution via simulation by Charlie (20231205 10:41:28) 
Under Lighthouse Kerfuffle (in Probability) Posted on 20231202 (2 Comments) 
 this is what I get by Charlie (20231203 08:51:53) 
Under Airport Codes (in Word Problems) Posted on 20231130 (4 Comments) 
 computer solution including international codes by Charlie (20231130 10:35:46) 
Under Who gave what to whom? (in Logic) Posted on 20231128 (7 Comments) 
 computer solution by Charlie (20231128 14:43:37) 
Under Letter Equation Surmise (in General) Posted on 20231128 (12 Comments) 
 re: iii) soln by Charlie (20231128 08:58:36) 
Under Bug on a Cube 2 (in Probability) Posted on 20231127 (5 Comments) 
 re: computer solution by Charlie (20231127 14:00:57) 
 computer solution by Charlie (20231127 13:56:24) 
Under Lighthouse Crossed Three Lights Mashup (in General) Posted on 20231127 (3 Comments) 
 solution by Charlie (20231127 09:21:32) 
Under Power growth (in Just Math) Posted on 20231126 (3 Comments) 
 computer solution by Charlie (20231126 09:15:18) 
Under Embedded Digital Product (in Numbers) Posted on 20231125 (2 Comments) 
 list of available digit sets by Charlie (20231125 14:03:01) 
 method of solution by Charlie (20231125 13:46:18) 
Under Bug on a Cube (in Probability) Posted on 20231119 (2 Comments) 
 some analytic, some computer by Charlie (20231119 13:08:53) 
Under Find all possible pairs (in Just Math) Posted on 20231119 (2 Comments) 
 computer exploration by Charlie (20231119 09:33:18) 
Under Last two digits (in Just Math) Posted on 20231118 (2 Comments) 
 computer solution by Charlie (20231118 10:09:12) 
Under A Limit of Sum Expressions (in Numbers) Posted on 20231116 (2 Comments) 
 solution by Charlie (20231116 09:46:42) 
Under A square is a square (in Numbers) Posted on 20231115 (3 Comments) 
 computer solution by Charlie (20231115 11:32:53) 
Under ABCDEABCDEABCDE is one (in Numbers) Posted on 20231114 (3 Comments) 
 solution by Charlie (20231114 14:46:20) 
Under Ten Squares (in Numbers) Posted on 20231113 (4 Comments) 
 computer findings by Charlie (20231113 15:58:31) 
Under Pandigital and Pretty Powerful VI (in Numbers) Posted on 20231113 (3 Comments) 
 if the puzzle had allowed N=2 by Charlie (20231113 09:56:11) 
 computer solution by Charlie (20231113 09:24:27) 
Under Smells Trigonometric (in Just Math) Posted on 20231112 (4 Comments) 
 re(2): based on Wolfram Alpha by Charlie (20231113 06:23:11) 
 based on Wolfram Alpha by Charlie (20231112 15:31:22) 
Under Minimum Value Muse 3 (in Numbers) Posted on 20231112 (2 Comments) 
 computer solution by Charlie (20231112 08:56:56) 
Under Additively Quadratic 2 (in Numbers) Posted on 20231111 (4 Comments) 
 re: Is this a finite set? by Charlie (20231111 12:36:23) 
 Is this a finite set? by Charlie (20231111 09:35:24) 
Under House Numbers on the Clock Street (in Numbers) Posted on 20231110 (1 Comments) 
 computer solution by Charlie (20231110 13:31:29) 
Under Two cases (in Sequences) Posted on 20231110 (4 Comments) 
 computer solution for part II only by Charlie (20231110 07:53:23) 
Under Four Squares II (in Numbers) Posted on 20231109 (2 Comments) 
 computer exploration by Charlie (20231109 18:18:25) 
Under Rex and Ralph's Math Competition (in Numbers) Posted on 20231108 (2 Comments) 
 computer solution by Charlie (20231108 13:20:02) 
Under Fibonacci Tail 2 (in Numbers) Posted on 20231108 (2 Comments) 
 computer solution by Charlie (20231108 09:06:56) 
Under complex trigonometry (in Just Math) Posted on 20231107 (2 Comments) 
 just the calculated answer  no insight by Charlie (20231107 10:31:42) 
Under Numbers in pi 2 (in Numbers) Posted on 20231105 (7 Comments) 
 re: new solution  Matlab confirmation by Charlie (20231107 07:02:43) 
 re: Different answer by Charlie (20231106 21:27:33) 
Under Some Even and Odd Crossed Difference (in Numbers) Posted on 20231103 (3 Comments) 
 re: Possible Solution  computer verification by Charlie (20231103 08:02:17) 
Under Eight Pandigital Primes (in Numbers) Posted on 20231102 (5 Comments) 
 re: Solution by Charlie (20231102 18:09:13) 
Under Onetenth Power Problem (in Numbers) Posted on 20231102 (3 Comments) 
 re: solution by Charlie (20231102 09:35:16) 
 solution by Charlie (20231102 08:56:23) 
Under 96 Tees (in Numbers) Posted on 20231101 (2 Comments) 
 re: computer solution by Charlie (20231101 16:03:05) 
 computer solution by Charlie (20231101 15:52:56) 
Under Reversible P and P^2 (in Numbers) Posted on 20231031 (4 Comments) 
 re: No Subject by Charlie (20231031 13:52:44) 
Under LCM and Equality Puzzle 2 (in Just Math) Posted on 20231031 (2 Comments) 
 exploration no proof by Charlie (20231031 08:35:02) 
Under Count the acceptable permutations (in Numbers) Posted on 20231030 (4 Comments) 
 computer exploration  no proof  spoiler by Charlie (20231030 12:08:50) 
Under Sum of the Digits 2 (in Numbers) Posted on 20231027 (4 Comments) 
 looking ahead by Charlie (20231027 12:52:57) 
Under Given the sum of sec and tan, Find the value of csc and cot (in Just Math) Posted on 20231027 (5 Comments) 
 computer answer by Charlie (20231027 08:39:51) 
Under Hexagon Picking Probability (in Shapes) Posted on 20231025 (7 Comments) 
 my numerical integration by Charlie (20231026 07:58:07) 
 re: Computer solution by Charlie (20231025 15:16:39) 
Under 1000 point star (in General) Posted on 20231025 (6 Comments) 
 solution by Charlie (20231025 08:55:29) 
Under Consider Prime Numbers, Get Cube (in Numbers) Posted on 20231024 (7 Comments) 
 computer solution by Charlie (20231024 08:49:46) 
Under Super Exponentiation Surmise IV (in Just Math) Posted on 20231023 (2 Comments) 
 solution by Charlie (20231023 14:11:14) 
Under Power Crossed Expression Evaluation (in Numbers) Posted on 20231022 (3 Comments) 
 possible solution by Charlie (20231022 09:48:39) 
Under Conjoined Twins (in Numbers) Posted on 20231020 (3 Comments) 
 computer solution by Charlie (20231020 12:34:16) 
Under Ratio Expression Evaluation (in Numbers) Posted on 20231019 (4 Comments) 
 short computer solution by Charlie (20231019 17:07:16) 
Under EMIRP pair inside a PRIME (in Numbers) Posted on 20231019 (1 Comments) 
 computer solution by Charlie (20231019 10:02:26) 
Under Integer Diagonal (in Numbers) Posted on 20231018 (4 Comments) 
 re(2): Computer solution by Charlie (20231018 16:08:39) 
 re: Computer solution by Charlie (20231018 15:50:22) 
 hmmm... a sortof computer solution (spoiler) by Charlie (20231018 12:08:24) 
Under Quadratic and Cubic Expression Quickie (in Just Math) Posted on 20231017 (2 Comments) 
 computer solution by Charlie (20231017 17:50:22) 
Under Super Exponentiation Surmise III (in Just Math) Posted on 20231017 (2 Comments) 
 solution by Charlie (20231017 13:58:13) 
 solution by Charlie (20231017 09:34:49) 
Under Digital Sum Triples (in Numbers) Posted on 20231015 (2 Comments) 
 computer solution by Charlie (20231015 10:14:32) 
Under Inverse Crossed Linear Power (in Just Math) Posted on 20231014 (13 Comments) 
 solution by Charlie (20231014 10:41:40) 
Under Swamp Length From Computed Angles (in General) Posted on 20231013 (7 Comments) 
 re(2): solution by Charlie (20231013 14:00:33) 
 solution by Charlie (20231013 12:24:45) 
Under Multiples of Powers (in Numbers) Posted on 20231012 (4 Comments) 
 re(2): solution by Charlie (20231015 22:21:45) 
 solution by Charlie (20231012 07:56:47) 
Under Digits of N^6 (in Numbers) Posted on 20231011 (3 Comments) 
 re: Computer solution by Charlie (20231011 10:28:43) 
Under nPandigital and kDivisible (in Numbers) Posted on 20231008 (1 Comments) 
 computer solution by Charlie (20231008 12:58:55) 
Under How Mean Is It? (in Just Math) Posted on 20231007 (2 Comments) 
 computer solution by Charlie (20231007 09:41:15) 
Under Fourteen Neighbor Nuance (in Logic) Posted on 20231006 (6 Comments) 
 computeraided solution by Charlie (20231006 09:24:24) 
Under Mystery Number Nuance (in Numbers) Posted on 20231005 (1 Comments) 
 solution (mostly computer) by Charlie (20231005 15:05:41) 
Under Curvey Weirdness (in Calculus) Posted on 20231005 (2 Comments) 
 graphical computer exploration by Charlie (20231005 09:08:44) 
Under 2x4 = 4x2 (in Numbers) Posted on 20231004 (2 Comments) 
 computer and visual selection by Charlie (20231004 09:14:50) 
Under Special demands (in Just Math) Posted on 20231002 (7 Comments) 
 re(3): solution by Charlie (20231002 21:53:33) 
 re(2): solution by Charlie (20231002 21:21:22) 
 solution by Charlie (20231002 15:35:58) 
Under All possible integer values of N (in Numbers) Posted on 20231002 (3 Comments) 
 solution by Charlie (20231002 09:24:48) 
Under Solve in Integers (in Numbers) Posted on 20231001 (5 Comments) 
 re(2): presumably all of them. by Charlie (20231001 09:55:31) 
 presumably all of them. by Charlie (20231001 08:28:41) 
Under Sock Sorting Space (in Probability) Posted on 20230930 (2 Comments) 
 random trials of one million each n by Charlie (20230930 12:59:31) 
Under What number is ALUMINE? (in Numbers) Posted on 20230930 (7 Comments) 
 re: Me think , it’s d0 by Charlie (20230930 08:31:28) 
 computer solution by Charlie (20230930 08:28:34) 
Under Near powers (in Numbers) Posted on 20230928 (2 Comments) 
 computer solution  no proof of uniqueness by Charlie (20230928 12:32:28) 
Under Double the Digits (in Numbers) Posted on 20230928 (2 Comments) 
 computer solution by Charlie (20230928 08:47:43) 
Under Five Pins on a Board (in Probability) Posted on 20230927 (3 Comments) 
 If the randomization area were a circle rather than a square by Charlie (20230927 22:17:10) 
 re: No Subject by Charlie (20230927 20:43:17) 
 No Subject by Charlie (20230927 15:05:10) 
Under Naughty Nimble Nines 2 (in Numbers) Posted on 20230927 (6 Comments) 
 re: One more by Charlie (20230927 09:57:05) 
 a solution by Charlie (20230927 08:39:58) 
Under Ratio Difference Crossed Value Determination (in Just Math) Posted on 20230926 (3 Comments) 
 computerassisted answer by Charlie (20230926 08:39:31) 
Under Splitting Words 2 (in Word Problems) Posted on 20230925 (1 Comments) 
 computer solution by Charlie (20230925 14:08:12) 
Under Integers only (in Sequences) Posted on 20230925 (6 Comments) 
 re: Solution by Charlie (20230925 08:44:01) 
 Hunting for x by Charlie (20230925 08:39:48) 
Under Consider the Value, Get Solution (in Numbers) Posted on 20230924 (2 Comments) 
 answer  no proof by Charlie (20230924 12:51:36) 
Under Checking the quantity (in Numbers) Posted on 20230923 (8 Comments) 
 re(2): Puzzle Answer by Charlie (20230924 07:27:17) 
 my computer findings by Charlie (20230923 20:05:21) 
Under Concatenated Pandigital (in Numbers) Posted on 20230923 (2 Comments) 
 computer solution by Charlie (20230923 08:58:01) 
Under Factorial Crossed Perfect Square Settlement (in Numbers) Posted on 20230921 (77 Comments) 
 computer solution by Charlie (20230921 09:20:34) 
Under Inserting a number into 2023 (in Numbers) Posted on 20230920 (2 Comments) 
 computer solutions (a and b) by Charlie (20230920 13:00:24) 
Under Marquez's Equation 2 (in Numbers) Posted on 20230920 (2 Comments) 
 computer solution by Charlie (20230920 11:10:14) 
Under Reversing Minute Hand Clock (in Just Math) Posted on 20230919 (1 Comments) 
 solution by Charlie (20230919 08:27:49) 
Under What is the Time? (in General) Posted on 20230912 (14 Comments) 
 re: computeraided solution by Charlie (20230912 10:37:46) 
 computeraided solution by Charlie (20230912 09:07:15) 
Under Accuracy Ascertainment (in Probability) Posted on 20230911 (6 Comments) 
 re: Extra Challenge Accepted (spoiler) by Charlie (20230913 06:58:04) 
 computeraided solution by Charlie (20230911 09:13:13) 
Under Clock Time Consideration (in General) Posted on 20230910 (9 Comments) 
 for the full 12 hours by Charlie (20230910 22:08:12) 
Under Even and Odd Digit Numbers (in Numbers) Posted on 20230908 (2 Comments) 
 going from perfect squares to their divisors by Charlie (20230908 11:37:35) 
Under Unique and restricted (in Word Problems) Posted on 20230906 (11 Comments) 
 re: No Subject by Charlie (20230907 10:06:53) 
 re(4): computer solution showing valid words by Charlie (20230906 23:24:07) 
 re(2): computer solution showing valid words by Charlie (20230906 16:06:36) 
 Words and solutions from the program by Charlie (20230906 13:51:28) 
 computer solution showing valid words by Charlie (20230906 13:48:31) 
Under The tangent formula (in Just Math) Posted on 20230906 (1 Comments) 
 heuristic "proof" by Charlie (20230906 08:53:09) 
Under A distorted chessboard (in Shapes) Posted on 20230905 (3 Comments) 
 computer solution by Charlie (20230905 12:51:43) 
Under Digital Product Triples (in Numbers) Posted on 20230905 (4 Comments) 
 re: Computer solution by Charlie (20230905 21:20:49) 
 computer findings by Charlie (20230905 09:35:07) 
Under Side constraint for maximizing area (in Just Math) Posted on 20230904 (7 Comments) 
 computer approximation by Charlie (20230904 12:27:26) 
Under Matrix probability (in Probability) Posted on 20230903 (2 Comments) 
 computer solution (spoiler) by Charlie (20230903 12:13:26) 
Under Powerful Parade (in Numbers) Posted on 20230903 (5 Comments) 
 re: I might be wrong but... by Charlie (20230903 10:40:16) 
Under A Quick Game with His Children (in Numbers) Posted on 20230902 (9 Comments) 
 solution by Charlie (20230902 09:21:30) 
Under Radical Real Value Resolution (in Just Math) Posted on 20230901 (2 Comments) 
 computer solution by Charlie (20230901 12:03:55) 
Under The Exam (in Logic) Posted on 20230831 (7 Comments) 
 computer solution by Charlie (20230831 09:07:10) 
Under Ten not welcomed... (in Probability) Posted on 20230830 (2 Comments) 
 solution by Charlie (20230830 10:00:27) 
Under Counting the Tilings (in Shapes) Posted on 20230829 (2 Comments) 
 re: Solution by Charlie (20230829 13:28:47) 
Under Book page number (in Just Math) Posted on 20230829 (6 Comments) 
 re: Analytic solution by Charlie (20230830 07:49:18) 
 computer solution with complete list by Charlie (20230829 08:52:33) 
Under Easy rhombus angle measurement (in Geometry) Posted on 20230826 (1 Comments) 
 GSP answer by Charlie (20230826 21:25:57) 
Under It is not 49 (in General) Posted on 20230826 (3 Comments) 
 computer solution by Charlie (20230826 07:47:07) 
Under A clock area (in Just Math) Posted on 20230823 (6 Comments) 
 computer solution by Charlie (20230823 14:58:30) 
Under Near pi Equation Solution Settlement (in Just Math) Posted on 20230823 (3 Comments) 
 What Wolfrm Alpha says by Charlie (20230824 09:53:23) 
Under Sum Six Digit Even Numbers (in Numbers) Posted on 20230822 (4 Comments) 
 re: different answer by Charlie (20230822 14:49:03) 
 different answer by Charlie (20230822 14:34:46) 
Under Counting triplets (in Numbers) Posted on 20230822 (3 Comments) 
 solution by Charlie (20230822 09:35:24) 
Under Logic of pets (in Logic) Posted on 20230821 (5 Comments) 
 computer solution (spoiler) by Charlie (20230821 11:03:56) 
Under Minimum distance between sets (in Just Math) Posted on 20230821 (1 Comments) 
 answer (spoiler) by Charlie (20230821 08:56:10) 
Under Another Couple 2 (in Word Problems) Posted on 20230820 (2 Comments) 
 from my wordlist by Charlie (20230820 09:30:04) 
Under Find this 4C4V word (in Word Problems) Posted on 20230819 (6 Comments) 
 re(2): computer solution by Charlie (20230826 07:52:46) 
 computer solution by Charlie (20230819 14:45:32) 
Under Given the Vertices, Find the Area (in Shapes) Posted on 20230819 (4 Comments) 
 solution by Charlie (20230819 08:10:23) 
 question by Charlie (20230819 06:27:58) 
Under Powers of the Digits (in Numbers) Posted on 20230818 (2 Comments) 
 computeraided solution by Charlie (20230818 13:18:23) 
Under Square Crossed Linear Expression Poser (in Numbers) Posted on 20230818 (2 Comments) 
 computer findings by Charlie (20230818 08:58:10) 
Under Continued Division and Parentheses Crossed Positive Integer Determination Poser (in Numbers) Posted on 20230816 (2 Comments) 
 computer solution by Charlie (20230816 14:03:26) 
Under Cheap or expensive (in Numbers) Posted on 20230816 (3 Comments) 
 from my word list by Charlie (20230816 09:22:52) 
Under World Capital Lexicon (in Word Problems) Posted on 20230815 (12 Comments) 
 9 by Charlie (20230815 14:44:13) 
 5 by Charlie (20230815 14:41:53) 
 6 by Charlie (20230815 14:25:16) 
 a small start by Charlie (20230815 13:58:52) 
Under Explore a diophantine equation (in Just Math) Posted on 20230814 (6 Comments) 
 computer solution by Charlie (20230814 09:03:19) 
Under Value Validation II (in Just Math) Posted on 20230812 (2 Comments) 
 my method by Charlie (20230812 09:01:05) 
Under A positive determinant (in Just Math) Posted on 20230811 (3 Comments) 
 solution by Charlie (20230811 22:54:03) 
Under Some Near Pythagorean Integers Sum to Squares (in Numbers) Posted on 20230811 (3 Comments) 
 computer solution by Charlie (20230811 09:01:04) 
Under Four Powers (in Just Math) Posted on 20230810 (2 Comments) 
 solution by Charlie (20230810 08:32:04) 
Under Card rotation (in Just Math) Posted on 20230809 (4 Comments) 
 solutions by Charlie (20230809 09:20:31) 
Under Maximize Rectangle on Semicircle in Triangle (in Calculus) Posted on 20230808 (5 Comments) 
 solution by Charlie (20230808 14:15:09) 
Under Given the Function, Calculate the Value (in Just Math) Posted on 20230808 (4 Comments) 
 re: computer solution  decimal version by Charlie (20230808 08:55:04) 
 computer solution by Charlie (20230808 08:46:00) 
Under Sum Fractional Ratios (in Numbers) Posted on 20230807 (4 Comments) 
 computer solution (spoiler) by Charlie (20230807 12:27:14) 
Under Scrap Merchant Travel Settlement (in General) Posted on 20230806 (4 Comments) 
 bare bones symbolic expressions by Charlie (20230806 10:23:43) 
 solution by Charlie (20230806 09:59:48) 
Under Four Sisters Crossed Birth Month Settlement (in Logic) Posted on 20230805 (2 Comments) 
 computer solution by Charlie (20230805 11:27:08) 
Under Floor Crossed Integer Quintuplet Query (in Numbers) Posted on 20230804 (7 Comments) 
 re(2): computer solution continued (last part) by Charlie (20230804 12:54:51) 
 re: computer solution continued by Charlie (20230804 12:52:57) 
 computer solution by Charlie (20230804 12:47:05) 
Under 3 perfect squares (in Just Math) Posted on 20230801 (6 Comments) 
 computer solution by Charlie (20230802 10:19:02) 
Under Concatenated 3digit integers Crossed Ratio Puzzle (in Numbers) Posted on 20230801 (3 Comments) 
 computer solution by Charlie (20230801 08:41:30) 
Under Irrational powered equation (in Just Math) Posted on 20230730 (3 Comments) 
 computer solution by Charlie (20230730 16:30:32) 
Under Logarithm Crossed Ordered Pairs Puzzle (in Just Math) Posted on 20230730 (4 Comments) 
 re: computer solution by Charlie (20230730 10:08:52) 
 computer solution by Charlie (20230730 09:43:47) 
Under Evened N and 3N Extended (in Numbers) Posted on 20230729 (4 Comments) 
 same answer as Larry's by Charlie (20230729 12:13:01) 
Under 711 game payoffs (in Probability) Posted on 20230729 (2 Comments) 
 solution by Charlie (20230729 08:50:51) 
Under Sevendigit Number (in Numbers) Posted on 20230728 (5 Comments) 
 computer solution by Charlie (20230728 12:25:19) 
Under 521st Digit Determination (in Just Math) Posted on 20230728 (2 Comments) 
 computer solution and an observation by Charlie (20230728 09:31:58) 
Under Derive a formula (in Just Math) Posted on 20230727 (3 Comments) 
 computer solution by Charlie (20230727 09:18:06) 
Under Evaluate an area (in Shapes) Posted on 20230725 (4 Comments) 
 same answer by Charlie (20230725 12:02:56) 
Under Permutation List 3 (in Numbers) Posted on 20230725 (3 Comments) 
 solution by Charlie (20230725 09:38:49) 
Under Restricted ternary numbers (in Numbers) Posted on 20230724 (4 Comments) 
 computer solution by Charlie (20230724 11:58:42) 
Under Consecutive inequality (in Numbers) Posted on 20230724 (3 Comments) 
 Solution (spoiler) by Charlie (20230724 08:15:57) 
Under Simultaneous equation (in Just Math) Posted on 20230723 (2 Comments) 
 answer by Charlie (20230723 11:25:54) 
Under Identical Digit Baffle III (in Numbers) Posted on 20230722 (3 Comments) 
 re: computer solution  list continued by Charlie (20230722 09:32:33) 
 computer solution by Charlie (20230722 09:28:03) 
Under Divisor count ratio (in Just Math) Posted on 20230721 (3 Comments) 
 analytic incomplete but computer solved by Charlie (20230721 12:57:40) 
Under Squares in a 4x4 Grid (in Numbers) Posted on 20230721 (6 Comments) 
 re(2): Solution by Charlie (20230721 10:52:00) 
 computer solution by Charlie (20230721 10:32:19) 
Under Concatenate Three Primes, Make Six Primes (in Numbers) Posted on 20230720 (1 Comments) 
 computer solution by Charlie (20230720 13:55:46) 
Under Five Distinct Prime Factors (in Numbers) Posted on 20230720 (1 Comments) 
 computer solution (spoiler) by Charlie (20230720 09:04:44) 
Under String of 8s and Divisibility (in Numbers) Posted on 20230719 (3 Comments) 
 solution by Charlie (20230719 13:14:02) 
Under Concentric Circles and a Chord (in Shapes) Posted on 20230719 (7 Comments) 
 solution by Charlie (20230719 08:19:47) 
Under Twentythird Power Posit (in Numbers) Posted on 20230718 (4 Comments) 
 solution by Charlie (20230718 08:29:26) 
Under Change the First Digit, Get Three Primes (in Numbers) Posted on 20230717 (2 Comments) 
 computer solution by Charlie (20230717 09:58:15) 
Under Center Six Digits (in Numbers) Posted on 20230715 (3 Comments) 
 my program by Charlie (20230715 10:33:28) 
Under Only two digits (in Probability) Posted on 20230714 (5 Comments) 
 Solution by Charlie (20230714 11:56:35) 
 re: simulation by Charlie (20230714 11:48:10) 
 simulation by Charlie (20230714 09:37:54) 
Under Some Decic Sin and Cos Sum to Rational Numbers (in Just Math) Posted on 20230712 (5 Comments) 
 what I find by Charlie (20230712 14:37:51) 
Under How many zeros? (in Numbers) Posted on 20230712 (3 Comments) 
 answer by Charlie (20230712 08:23:46) 
Under Squares and Cubes from Wooden Cubes (in Just Math) Posted on 20230711 (1 Comments) 
 computer solution by Charlie (20230711 14:02:42) 
Under Triangle of Sticks (in Just Math) Posted on 20230711 (4 Comments) 
 computer solution by Charlie (20230711 09:28:31) 
Under Finding 2022nd derivative (in Calculus) Posted on 20230707 (15 Comments) 
 patterns are elusive by Charlie (20230707 12:16:36) 
Under Dodecagon Based Pyramid (in Shapes) Posted on 20230706 (4 Comments) 
 my 2 cents by Charlie (20230706 17:37:01) 
Under Remainder Crossed Digit Permutation Resolution (in Numbers) Posted on 20230706 (3 Comments) 
 computeraided analysis by Charlie (20230706 07:11:45) 
Under Cubic Root Comparison (in Just Math) Posted on 20230705 (2 Comments) 
 well it is a proof if you just solve it by Charlie (20230706 17:41:53) 
Under Let there be Light! (in Science) Posted on 20230704 (5 Comments) 
 Solution (spoiler) by Charlie (20230704 17:31:41) 
Under Some Quartic Expressions Sum to Fourth Powers (in Numbers) Posted on 20230704 (2 Comments) 
 solution by Charlie (20230704 08:32:33) 
Under 98 Crossed Sum of Digits Puzzle (in Numbers) Posted on 20230703 (6 Comments) 
 re: Analytic solution by Charlie (20230703 14:12:24) 
 computer solution by Charlie (20230703 13:59:43) 
Under What BIG is bigger? (in Just Math) Posted on 20230703 (4 Comments) 
 a solution by Charlie (20230703 08:56:30) 
Under Three 3digit Positive Integers (in Numbers) Posted on 20230702 (5 Comments) 
 computer solution by Charlie (20230702 14:13:24) 
Under Add 1 to Exponent*Number, Get Square (in Numbers) Posted on 20230702 (2 Comments) 
 computer findings by Charlie (20230702 10:09:16) 
Under Ingenious Sum Puzzle 2 (in Numbers) Posted on 20230701 (2 Comments) 
 (A) only (partial spoiler) by Charlie (20230701 12:21:00) 
Under Radar decoded (in Just Math) Posted on 20230701 (9 Comments) 
 re: Puzzle Answer by Charlie (20230701 11:17:29) 
Under Seventh Power Decision Settlement (in Numbers) Posted on 20230630 (3 Comments) 
 computer solution by Charlie (20230630 16:03:51) 
Under Some Prime Fractions sum to Integer Fraction (in Numbers) Posted on 20230629 (4 Comments) 
 computer exploration by Charlie (20230629 09:41:25) 
Under Try a tricky solution (in Just Math) Posted on 20230628 (6 Comments) 
 computer solution by Charlie (20230628 17:05:22) 
Under Weightloss Program Poser (in Numbers) Posted on 20230628 (3 Comments) 
 computer solution by Charlie (20230628 16:41:37) 
Under Year Yearn 5 (in Algorithms) Posted on 20230628 (4 Comments) 
 computer solution (spoiler) by Charlie (20230628 08:42:31) 
Under Golden Substitution (in Just Math) Posted on 20230627 (1 Comments) 
 computer ev by Charlie (20230627 13:18:55) 
Under 2013 and Perfect Square Settlement (in Numbers) Posted on 20230625 (3 Comments) 
 computer solution by Charlie (20230625 16:42:37) 
Under More solutions, please (in Just Math) Posted on 20230623 (5 Comments) 
 computer findings by Charlie (20230623 12:55:00) 
Under Given Multiderivative Function, Find the value (in Calculus) Posted on 20230623 (2 Comments) 
 computer solution by Charlie (20230623 10:58:13) 
Under Missing Tetradecimal Digits Determination (in Numbers) Posted on 20230622 (10 Comments) 
 computer solution by Charlie (20230622 13:43:26) 
Under Some Linear Combination of Prime May Be a Perfect Square (in Numbers) Posted on 20230621 (2 Comments) 
 an answer  strictly speaking by Charlie (20230621 12:55:18) 
Under Minimizing disjoint sum (in Just Math) Posted on 20230620 (6 Comments) 
 computer solution by Charlie (20230620 14:04:12) 
Under Terminating in Eight 8s (in Numbers) Posted on 20230620 (2 Comments) 
 computer solution by Charlie (20230620 09:26:16) 
Under Divisible and not Divisible (in Numbers) Posted on 20230619 (3 Comments) 
 computer solution by Charlie (20230619 14:38:51) 
Under Circle Constitution Crossed Person Removal Resolution (in Games) Posted on 20230619 (1 Comments) 
 solution (spoiler) by Charlie (20230619 09:20:34) 
Under A teller of truth and lies (in Riddles) Posted on 20230617 (2 Comments) 
 guesses by Charlie (20230617 15:34:22) 
Under Minimum and 2015 Multiple Muse (in Numbers) Posted on 20230616 (2 Comments) 
 computer solution by Charlie (20230616 10:52:21) 
Under Three Linear Expressions Divide Three Exponent Expressions (in Numbers) Posted on 20230615 (4 Comments) 
 re: There is another solution. by Charlie (20230620 10:36:01) 
 computer exploration by Charlie (20230615 09:41:33) 
Under Four Smallest Prime Factor Sum Settlement (in Numbers) Posted on 20230614 (2 Comments) 
 re: computer solution  without extended precision by Charlie (20230614 22:15:31) 
 computer solution by Charlie (20230614 13:40:54) 
Under The Count of Integers (in Numbers) Posted on 20230612 (3 Comments) 
 re: for integral r only (spoiler) by Charlie (20230612 13:35:10) 
 for integral r only (spoiler) by Charlie (20230612 12:59:14) 
Under Reciprocal Equation #8 (in Numbers) Posted on 20230611 (4 Comments) 
 solution by Charlie (20230611 09:37:04) 
Under Preperiod and Period Poser (in Numbers) Posted on 20230609 (3 Comments) 
 computer solution by Charlie (20230609 13:21:15) 
Under Ordinary Numbers (in Sequences) Posted on 20230609 (4 Comments) 
 hint by Charlie (20230610 14:26:49) 
Under Pandigital Crossed Perfect Square Poser (in Numbers) Posted on 20230608 (2 Comments) 
 computer solution by Charlie (20230608 12:02:15) 
Under Emirp Times (in Numbers) Posted on 20230607 (1 Comments) 
 computer solution by Charlie (20230607 15:13:43) 
Under Coded Crossword 4 (in Cryptography) Posted on 20230607 (3 Comments) 
 my best attempt by Charlie (20230607 10:15:57) 
Under Nested sin and cos equality (in Just Math) Posted on 20230605 (2 Comments) 
 re: computer solution by Charlie (20230605 14:15:23) 
 computer solution by Charlie (20230605 13:43:41) 
Under The determinant is divisible by three (in Just Math) Posted on 20230605 (5 Comments) 
 solution by Charlie (20230605 10:00:54) 
Under Binomial and Floor Difference Crossed Division Determination (in Just Math) Posted on 20230603 (3 Comments) 
 re: Computer solution by Charlie (20230603 12:07:38) 
Under Friendly numbers (in Numbers) Posted on 20230602 (5 Comments) 
 #1 and a start at #4 and failed attempt at 2 by Charlie (20230602 12:13:13) 
Under Included in both A^B and B^A (in Numbers) Posted on 20230601 (1 Comments) 
 computer solution by Charlie (20230601 14:51:22) 
Under Reveal the Quote (in Word Problems) Posted on 20230601 (4 Comments) 
 solution by Charlie (20230601 10:13:53) 
Under Unsolved (so far) problem (in General) Posted on 20230531 (3 Comments) 
 computer solution by Charlie (20230531 10:01:45) 
Under Maximum Polygon Area Ascertainment (in Shapes) Posted on 20230530 (4 Comments) 
 solution by Charlie (20230530 13:57:03) 
Under Pandigital W numbers (in Numbers) Posted on 20230530 (4 Comments) 
 solution by Charlie (20230530 10:02:36) 
Under Phrasing Frustration (in Word Problems) Posted on 20230529 (2 Comments) 
 a couple of wild guesses by Charlie (20230530 10:39:16) 
Under Millionth Pandigital II (in Numbers) Posted on 20230529 (11 Comments) 
 solution by Charlie (20230529 11:34:57) 
Under Given the ratio, Find the Sum (in Numbers) Posted on 20230525 (3 Comments) 
 some more by Charlie (20230525 13:57:59) 
Under Pythagorean Crossed Six Consecutive Digit Determination (in Numbers) Posted on 20230524 (2 Comments) 
 computer solution by Charlie (20230524 12:44:36) 
Under Quick estimate (in Numbers) Posted on 20230524 (11 Comments) 
 re: close by Charlie (20230526 19:21:03) 
 close by Charlie (20230526 18:32:14) 
 re: ….re(3): Not the solution  indeed… by Charlie (20230525 07:50:27) 
 re(2): Not the solution  indeed. by Charlie (20230524 16:09:21) 
 re: Not the solution  maybe it still is by Charlie (20230524 11:36:25) 
 Not the solution by Charlie (20230524 11:00:48) 
Under Is this a Prime Number ? (in Numbers) Posted on 20230523 (2 Comments) 
 solution by Charlie (20230523 11:56:58) 
Under He gave me S and asked for X (in Just Math) Posted on 20230523 (4 Comments) 
 re: more findings  revised statistics by Charlie (20230523 17:07:36) 
 re: more findings by Charlie (20230523 16:40:02) 
 computer findings by Charlie (20230523 07:12:27) 
Under From M to N (in Just Math) Posted on 20230522 (4 Comments) 
 re: Other 4digit M values  continued by Charlie (20230522 12:58:51) 
 Other 4digit M values by Charlie (20230522 12:54:00) 
 Part 2 by Charlie (20230522 12:40:34) 
Under Take Factorial Ratios, Get Minimum (in Numbers) Posted on 20230517 (3 Comments) 
 computer solution  Matlab by Charlie (20230517 10:56:12) 
Under Divisible by Prime Power (in Algorithms) Posted on 20230515 (1 Comments) 
 computer solution by Charlie (20230515 13:57:09) 
Under Similar to Find My Number (in Probability) Posted on 20230515 (6 Comments) 
 solution and commentary by Charlie (20230515 08:02:01) 
Under That's a lotta numbers! (2) (in Numbers) Posted on 20230514 (2 Comments) 
 solution by Charlie (20230514 10:08:27) 
Under Unit square overlap I (in Calculus) Posted on 20230512 (7 Comments) 
 re: numeric solution by Charlie (20230512 14:32:35) 
 numeric solution by Charlie (20230512 13:49:09) 
Under The Railway Station Clock (in General) Posted on 20230512 (1 Comments) 
 close enough by Charlie (20230512 08:12:03) 
Under Erase as much as needed (in Just Math) Posted on 20230511 (3 Comments) 
 solution by Charlie (20230511 10:00:24) 
Under Large factor product (in Numbers) Posted on 20230510 (4 Comments) 
 computerbased solution by Charlie (20230510 15:07:12) 
Under Rock smashing competition (in Probability) Posted on 20230508 (7 Comments) 
 computer solution by Charlie (20230508 14:22:56) 
Under Ones and Twos (in Just Math) Posted on 20230504 (4 Comments) 
 computer solution by Charlie (20230504 15:36:03) 
Under Pick 6 get power of 6 (in Numbers) Posted on 20230503 (9 Comments) 
 re(2): manual solution by Charlie (20230504 15:52:24) 
 corrected program and solution by Charlie (20230504 15:45:58) 
 computer solution (spoiler) by Charlie (20230503 16:26:21) 
Under Mission impossible? (in Numbers) Posted on 20230502 (1 Comments) 
 computer solution by Charlie (20230502 14:46:36) 
Under Prime squares with distinct digits 2 (in Numbers) Posted on 20230502 (2 Comments) 
 computer solution by Charlie (20230502 10:57:05) 
Under Inconsiderable Fifth Power Finding (in Numbers) Posted on 20230430 (2 Comments) 
 Solution (spoiler) by Charlie (20230430 09:41:45) 
Under Inscribed Polygon Crossed Root Side Resolution (in Shapes) Posted on 20230429 (6 Comments) 
 re: my solution  corrected by Charlie (20230429 08:25:02) 
 solution by Charlie (20230429 08:14:14) 
Under A Complex Equation (in Just Math) Posted on 20230428 (4 Comments) 
 re: Puzzle Solution by Charlie (20230428 14:18:21) 
Under Digits of π in π^2 (in Numbers) Posted on 20230427 (1 Comments) 
 computer solution by Charlie (20230427 08:56:35) 
Under Given Two sods, Find the sod (in Numbers) Posted on 20230426 (4 Comments) 
 solution (conditional) by Charlie (20230426 11:43:19) 
Under A polynomial equation (in Just Math) Posted on 20230426 (8 Comments) 
 computer solution by Charlie (20230426 22:12:20) 
Under Place Ten Positive Integers, Get Minimum (in Numbers) Posted on 20230425 (5 Comments) 
 I think this is it by Charlie (20230425 11:50:28) 
Under Calling for ALL solutions (in Just Math) Posted on 20230424 (2 Comments) 
 solution by Charlie (20230424 11:34:19) 
Under Cross Product Quickie (in Numbers) Posted on 20230424 (6 Comments) 
 p&p by Charlie (20230424 09:59:13) 
Under Ay. ay. ay (in Just Math) Posted on 20230423 (3 Comments) 
 computer approach by Charlie (20230423 11:09:09) 
Under 2023 (in General) Posted on 20230422 (1 Comments) 
 computer solution by Charlie (20230422 20:30:44) 
Under Triple seven power (in Just Math) Posted on 20230421 (14 Comments) 
 re(3): Errorless text Yes indeed  computer solution by Charlie (20230422 08:39:01) 
 some computer findings by Charlie (20230421 10:49:04) 
Under Pandigital and Pretty Powerful V (in Numbers) Posted on 20230420 (2 Comments) 
 re: solution, I hope by Charlie (20230420 22:06:24) 
 solution, I hope by Charlie (20230420 21:48:13) 
Under Three Digit Integers Crossed 170 Multiple Muse (in Numbers) Posted on 20230419 (5 Comments) 
 some mod info by Charlie (20230419 17:56:14) 
Under Prime sums (in Numbers) Posted on 20230419 (3 Comments) 
 computer solution by Charlie (20230419 09:01:58) 
Under Four Dozen Camper Conclusion (in Logic) Posted on 20230418 (3 Comments) 
 solution by Charlie (20230418 09:07:52) 
Under What happens next? (in General) Posted on 20230417 (6 Comments) 
 re(2): computer finding hint by Charlie (20230417 15:27:07) 
 computer finding by Charlie (20230417 14:23:25) 
Under Flooring a FloorCeiling Function (in Just Math) Posted on 20230417 (5 Comments) 
 solution by Charlie (20230417 10:02:32) 
Under ProductDifference Crossed Power Poser (in Numbers) Posted on 20230415 (2 Comments) 
 No Subject by Charlie (20230415 10:58:47) 
Under Quintic Minimum (in Numbers) Posted on 20230413 (4 Comments) 
 Best greedy algorithm I could find is nowhere near as good as Larry's algorithm by Charlie (20230413 13:57:54) 
Under Paint it Black and Blue (in Probability) Posted on 20230413 (1 Comments) 
 solution (if I did it right) by Charlie (20230413 10:16:24) 
Under Roman WORD2NUM (in Word Problems) Posted on 20230412 (4 Comments) 
 re(2): what comes to mind and then computer help (spoilers) by Charlie (20230413 14:24:19) 
 what comes to mind and then computer help (spoilers) by Charlie (20230412 14:09:08) 
Under Nice infinite series (in Sequences) Posted on 20230411 (3 Comments) 
 computer calculation and some observations by Charlie (20230412 08:01:50) 
Under Conjugate and radical equation (in Just Math) Posted on 20230411 (3 Comments) 
 all values, via computer by Charlie (20230411 15:13:43) 
Under BCCDEFGGB and Perfect Square (in Numbers) Posted on 20230410 (3 Comments) 
 computer solution by Charlie (20230410 14:30:16) 
Under Basic trigo equation (in Just Math) Posted on 20230410 (2 Comments) 
 solution by Charlie (20230410 10:38:22) 
Under Carpe Diem (in Numbers) Posted on 20230407 (5 Comments) 
 re: The day this puzzle was posted by Charlie (20230408 15:03:53) 
 part d by Charlie (20230407 19:12:52) 
 re: checking Ady and a  c  the programs by Charlie (20230407 17:28:29) 
 checking Ady and a  c by Charlie (20230407 17:26:16) 
Under Seems unlikely, but is not … (in Just Math) Posted on 20230406 (3 Comments) 
 re: Solution by Charlie (20230407 06:31:44) 
Under Signal Settlement (in Probability) Posted on 20230405 (5 Comments) 
 re: solution  if there were 4 transmissions by Charlie (20230405 17:08:09) 
 solution by Charlie (20230405 16:59:39) 
Under Special Indices II (in Numbers) Posted on 20230405 (3 Comments) 
 other "years" by Charlie (20230405 10:13:29) 
Under Factorials galore (in Sequences) Posted on 20230404 (2 Comments) 
 re: Puzzle Solution  numeric verification by Charlie (20230404 13:32:26) 
Under Kebab Palace Casino Conclusion (in Probability) Posted on 20230404 (4 Comments) 
 Counting the ways another way by Charlie (20230404 12:58:30) 
Under Floored parabola (in Just Math) Posted on 20230403 (4 Comments) 
 computer solution by Charlie (20230403 09:03:53) 
Under Special (int)ention (in Just Math) Posted on 20230402 (8 Comments) 
 re(2): solution by Charlie (20230402 19:52:45) 
 solution by Charlie (20230402 10:46:32) 
Under Power Crossed Cube Conclusion (in Numbers) Posted on 20230401 (3 Comments) 
 computer solution by Charlie (20230401 11:29:11) 
Under Faulty Calculator Frolic (in Numbers) Posted on 20230331 (4 Comments) 
 re: computer solution by Charlie (20230331 13:50:39) 
 computer solution by Charlie (20230331 09:47:52) 
Under An irrational answer (in Numbers) Posted on 20230330 (6 Comments) 
 re: Puzzle Solution by Charlie (20230331 10:54:11) 
 re: Solution  an interesting aside by Charlie (20230330 10:22:57) 
Under Another triangle in a square problem (in Geometry) Posted on 20230329 (4 Comments) 
 my solution by Charlie (20230329 21:52:20) 
Under 52card lottery (in Probability) Posted on 20230329 (12 Comments) 
 re: Part 1 and 2 solutions by Charlie (20230329 10:52:26) 
 re: Part 2 (analytical corrected) by Charlie (20230329 10:11:25) 
 re: Computer solution by Charlie (20230329 09:54:38) 
 re: Parts 1 and 2 (analytical spoiler) by Charlie (20230329 08:01:44) 
Under More Arithmetic Integers II (in Numbers) Posted on 20230328 (2 Comments) 
 computer solution by Charlie (20230328 15:44:30) 
Under Tea Team Quickie (in Numbers) Posted on 20230328 (3 Comments) 
 well... by Charlie (20230328 09:28:52) 
Under Dart Discharge II (in Numbers) Posted on 20230327 (4 Comments) 
 computer solution by Charlie (20230327 09:31:53) 
Under Sawtooth Crossed Ratio Resolution (in Numbers) Posted on 20230325 (3 Comments) 
 computer methods by Charlie (20230325 11:56:54) 
Under Deux Duodecimal Prime Number Determination. (in Numbers) Posted on 20230324 (2 Comments) 
 computer solution by Charlie (20230324 08:27:06) 
Under Power after power (in Just Math) Posted on 20230322 (3 Comments) 
 How to solve without really thinking... by Charlie (20230322 13:22:57) 
Under Eight Buttons (in General) Posted on 20230321 (2 Comments) 
 re: computer solution by Charlie (20230321 17:26:29) 
 computer solution by Charlie (20230321 14:51:52) 
Under Fifth Powers (in Just Math) Posted on 20230321 (3 Comments) 
 computer exploration by Charlie (20230321 09:48:42) 
Under Mean Crossed Reversal Muse (in Numbers) Posted on 20230319 (3 Comments) 
 computer solution by Charlie (20230319 10:41:38) 
Under 6 teams (in Probability) Posted on 20230317 (11 Comments) 
 re: an ambiguity? by Charlie (20230317 10:30:06) 
 computer solution and discussion by Charlie (20230317 10:21:02) 
Under Three Consecutive Letters in Order (in Word Problems) Posted on 20230315 (2 Comments) 
 computer solution (Matlab) by Charlie (20230315 14:21:58) 
Under Comparing results (in Probability) Posted on 20230315 (1 Comments) 
 computer solution by Charlie (20230315 10:06:15) 
Under Sum of two squares (in Numbers) Posted on 20230314 (4 Comments) 
 computer solution by Charlie (20230314 11:59:57) 
Under Four For Dinner Identification (in Logic) Posted on 20230313 (2 Comments) 
 computer solution by Charlie (20230313 14:37:00) 
Under Not on Earth, not on the sky (in Riddles) Posted on 20230313 (2 Comments) 
 possibility by Charlie (20230313 10:35:37) 
Under Duodecimal Digital Expansion Puzzle (in Numbers) Posted on 20230311 (3 Comments) 
 solution by Charlie (20230311 09:20:32) 
Under World Series Gamble Settlement (in General) Posted on 20230309 (5 Comments) 
 re: Clarification by Charlie (20230309 08:26:31) 
Under Heptagon in a Square (in Shapes) Posted on 20230307 (13 Comments) 
 re: Some thoughts  a solution by Charlie (20230308 10:36:37) 
Under Stairway Ascension Ascertainment (in Numbers) Posted on 20230307 (6 Comments) 
 computer solution by Charlie (20230307 09:38:03) 
Under Three Coin Consideration (in Logic) Posted on 20230303 (5 Comments) 
 re: Solution by Charlie (20230303 13:12:35) 
 computer solution by Charlie (20230303 13:09:56) 
Under Finding Two Calculator Fractions (in Numbers) Posted on 20230302 (4 Comments) 
 solutions by Charlie (20230302 15:38:38) 
Under Two vending machines (in Probability) Posted on 20230302 (2 Comments) 
 solution (spoiler) by Charlie (20230302 07:40:38) 
Under Super Exponentiation Surmise II (in Just Math) Posted on 20230301 (2 Comments) 
 a graph by Charlie (20230301 14:56:17) 
 computer exploration by Charlie (20230301 14:34:30) 
Under Mr. Wolfingham's Fiancée (in Logic) Posted on 20230301 (5 Comments) 
 computer solution by Charlie (20230301 09:29:43) 
Under WG’s quintuple (in Numbers) Posted on 20230228 (3 Comments) 
 No Subject by Charlie (20230228 15:37:26) 
Under Four Credible Word Conclusion (in Word Problems) Posted on 20230228 (2 Comments) 
 computer solution by Charlie (20230228 09:37:31) 
Under Some 2 Powers Sum to Factorial (in Numbers) Posted on 20230227 (5 Comments) 
 without proof of completeness by Charlie (20230227 12:46:52) 
Under 3 integers (in Numbers) Posted on 20230227 (6 Comments) 
 re: Which did you have in mind? by Charlie (20230227 08:38:01) 
Under Evaluate x (in Just Math) Posted on 20230225 (4 Comments) 
 two ways by Charlie (20230225 08:18:35) 
Under Reciprocal Equation #7 (in Numbers) Posted on 20230224 (4 Comments) 
 solution by Charlie (20230224 08:47:55) 
Under Triplet Trouble (in Sequences) Posted on 20230223 (2 Comments) 
 program by Charlie (20230223 20:35:02) 
Under Skier and Force Formulation (in Science) Posted on 20230223 (8 Comments) 
 re(2): solution (sort of) by Charlie (20230224 17:26:32) 
 solution (sort of) by Charlie (20230223 09:06:18) 
Under Heather's Fiancé (in Liars and Knights) Posted on 20230222 (2 Comments) 
 most of the solution by Charlie (20230222 10:34:55) 
Under Possible Pisano Poser? (in Numbers) Posted on 20230221 (4 Comments) 
 computer solution by Charlie (20230221 15:05:55) 
Under 4 distinct pairs (in Just Math) Posted on 20230220 (5 Comments) 
 my thoughts by Charlie (20230220 09:07:08) 
Under Fibonacci but with Subtraction still stays Positive (in Sequences) Posted on 20230215 (3 Comments) 
 solution by Charlie (20230215 17:13:49) 
Under Broken TV Testament (in Science) Posted on 20230215 (2 Comments) 
 solution by Charlie (20230215 08:58:13) 
Under Metapuzzle II (in Algorithms) Posted on 20230214 (1 Comments) 
 correction to link in puzzle by Charlie (20230222 13:11:03) 
Under Golfer Gauge II (in Liars and Knights) Posted on 20230213 (1 Comments) 
 solution by Charlie (20230213 08:38:01) 
Under Arithmetic Sequence Crossed Integer Determination Puzzle (in Numbers) Posted on 20230212 (6 Comments) 
 the full grids by Charlie (20230213 19:17:32) 
 re: computer solution by Charlie (20230212 09:38:58) 
 computer solution by Charlie (20230212 09:16:29) 
Under Respectively Divisible II (in Numbers) Posted on 20230210 (4 Comments) 
 computer solution by Charlie (20230210 10:05:51) 
Under sod(N) = pod(sqrt(N)) (in Numbers) Posted on 20230209 (3 Comments) 
 re: thought on (c) by Charlie (20230209 09:55:06) 
 thought on (c) by Charlie (20230209 09:34:45) 
 computer solution of (a) and (b)  spoilers by Charlie (20230209 09:30:16) 
Under Cube Rooted and Squared Til 2023 (in Just Math) Posted on 20230208 (2 Comments) 
 computer evaluation (spoiler) by Charlie (20230208 09:38:08) 
Under Phi Proximity Poser (in Numbers) Posted on 20230207 (3 Comments) 
 computer exploration on part I by Charlie (20230207 14:39:21) 
Under Name the base (in Just Math) Posted on 20230207 (4 Comments) 
 the computer method by Charlie (20230207 08:03:48) 
Under Consider Prime Ratios, Get Integers (in Numbers) Posted on 20230204 (4 Comments) 
 computer findings by Charlie (20230204 09:54:58) 
Under Fours and Fives Crossed Fortune Formulation (in Numbers) Posted on 20230203 (4 Comments) 
 computer then interpretation by Charlie (20230203 11:15:57) 
Under Prisons foes (in Word Problems) Posted on 20230202 (7 Comments) 
 a start by Charlie (20230202 09:17:00) 
Under Partially filled cone (in Geometry) Posted on 20230201 (3 Comments) 
 solution by Charlie (20230201 09:32:56) 
Under Archaic Anagram Ascertainment (in Word Problems) Posted on 20230131 (1 Comments) 
 solution by Charlie (20230131 10:38:12) 
Under Long Distance Proposal Poser (in Science) Posted on 20230130 (1 Comments) 
 Solution (spoiler) by Charlie (20230130 09:26:55) 
Under Semiprime times (in Numbers) Posted on 20230129 (1 Comments) 
 computer solution by Charlie (20230129 12:12:17) 
Under LynchBell numbers (in Numbers) Posted on 20230127 (3 Comments) 
 Also answered, how many there are by Charlie (20230127 10:35:09) 
Under Integers with Happy, Healthy Babies (in Numbers) Posted on 20230126 (1 Comments) 
 computer solution by Charlie (20230126 10:32:05) 
Under Ducks in a pond (in Probability) Posted on 20230124 (17 Comments) 
 3 ducks as a simulation by Charlie (20230124 11:36:21) 
 4 ducks as a simulation by Charlie (20230124 11:15:22) 
 numerical integration with 4 ducks by Charlie (20230124 11:10:00) 
 re: my err  no actually it was MY error by Charlie (20230124 10:45:48) 
 numerical integration for 3 ducks by Charlie (20230124 09:58:55) 
Under Log Value Extrication (in Just Math) Posted on 20230122 (2 Comments) 
 solution by Charlie (20230122 11:02:41) 
Under Provisory Pairs (in Numbers) Posted on 20230121 (2 Comments) 
 some numbers to look at by Charlie (20230121 09:11:18) 
Under Minimum Integer from Last 2 Digits Puzzle (in Numbers) Posted on 20230120 (2 Comments) 
 computer solution by Charlie (20230120 14:13:12) 
Under Change the First Digit, Get Two Primes (in Numbers) Posted on 20230119 (2 Comments) 
 computer solution by Charlie (20230119 09:18:29) 
Under Value Validation (in Just Math) Posted on 20230118 (2 Comments) 
 Is this indirect enough? by Charlie (20230118 09:54:46) 
Under Fibonacci Lengths (in Numbers) Posted on 20230116 (2 Comments) 
 The start of a proof by Charlie (20230116 10:38:18) 
Under Semiprimes and Emirps (in Numbers) Posted on 20230114 (5 Comments) 
 re: semianalytic solution by Charlie (20230114 11:05:15) 
 computer solution by Charlie (20230114 11:01:12) 
Under Four Points in a Square (in Probability) Posted on 20230112 (10 Comments) 
 Code for sanity check by Charlie (20230113 08:35:34) 
 re: Sanity check on classification  last part got cut off by Charlie (20230113 08:29:59) 
 Sanity check on classification by Charlie (20230113 08:27:53) 
 re(2): preliminary simulation results by Charlie (20230112 18:17:52) 
 re: preliminary simulation results by Charlie (20230112 11:44:24) 
 preliminary simulation results by Charlie (20230112 09:49:53) 
Under Countries of the World II (in Cryptography) Posted on 20230111 (2 Comments) 
 computer solution by Charlie (20230111 09:12:16) 
Under Three digits (in Numbers) Posted on 20230110 (4 Comments) 
 computer solution by Charlie (20230110 09:05:17) 
Under Alphametic Quickie (in Numbers) Posted on 20230109 (4 Comments) 
 re: Solution by Charlie (20230109 10:43:29) 
 solution by Charlie (20230109 10:41:18) 
Under Simultaneous Settlement VII (in Just Math) Posted on 20230108 (6 Comments) 
 computer solution by Charlie (20230108 08:56:36) 
Under Pandigital Product Crossed Square Poser (in Numbers) Posted on 20230106 (18 Comments) 
 re(2): Solution by Charlie (20230106 14:46:30) 
 re: Solution by Charlie (20230106 14:11:39) 
Under Narcissistic minus 1: Cerossistic (in Numbers) Posted on 20230105 (4 Comments) 
 computer solution by Charlie (20230105 10:14:00) 
Under 1 2 3 4. How high is your score? (in Numbers) Posted on 20230103 (2 Comments) 
 computer solution (spoiler) by Charlie (20230103 21:15:24) 
Under Ones and Zero Operation Outcome (in Tricks) Posted on 20230102 (3 Comments) 
 my take on it by Charlie (20230102 10:03:06) 
Under A 1/1 problem (in Numbers) Posted on 20230101 (5 Comments) 
 re(3): hoping this is concise enough by Charlie (20230103 08:57:40) 
 hoping this is concise enough by Charlie (20230101 09:06:28) 
Under Bless you, Blaise! (in Probability) Posted on 20221231 (2 Comments) 
 answers by Charlie (20221231 08:56:11) 
Under A quadruple gift for the N.Y. (in Numbers) Posted on 20221228 (8 Comments) 
 re(2): solutions by Charlie (20221230 07:38:21) 
 solutions by Charlie (20221228 08:51:38) 
Under Optimal Motorbike Travel Option (in General) Posted on 20221227 (7 Comments) 
 researched solution by Charlie (20221227 10:40:38) 
Under Split Words Settlement IV (in Word Problems) Posted on 20221226 (4 Comments) 
 solution by Charlie (20221226 10:23:39) 
Under Six Friends and a Wallet Puzzle (in Liars and Knights) Posted on 20221225 (3 Comments) 
 solution by Charlie (20221225 10:29:10) 
Under IO Ratio Resolution (in Word Problems) Posted on 20221224 (4 Comments) 
 from my word list by Charlie (20221224 12:59:42) 
Under Gaussian Rectangle Problem (in Just Math) Posted on 20221223 (4 Comments) 
 re: Part 1 and part of part 2 by Charlie (20221223 11:05:11) 
 re: computer answers (spoilers) by Charlie (20221223 10:38:44) 
 computer answers (spoilers) by Charlie (20221223 10:06:52) 
Under Triangular and Heptagonal Hindrance (in Numbers) Posted on 20221222 (3 Comments) 
 computer solution by Charlie (20221222 10:28:40) 
Under Ukraine war (in Word Problems) Posted on 20221221 (4 Comments) 
 a couple more by Charlie (20221221 10:08:03) 
Under Near Exponential Expressions Crossed Value Derivation (in Just Math) Posted on 20221220 (2 Comments) 
 solution by Charlie (20221220 08:25:01) 
Under Permuted Duodecimal Mean Muse (in Numbers) Posted on 20221219 (5 Comments) 
 re: Solution by Charlie (20221219 07:56:17) 
 solution by Charlie (20221219 07:41:38) 
Under Year Yearn 4 (in Numbers) Posted on 20221218 (5 Comments) 
 re(2): computer findings by Charlie (20221218 16:35:23) 
 computer findings by Charlie (20221218 10:28:52) 
Under More Tangential Trapezoids (in Geometry) Posted on 20221216 (4 Comments) 
 Bonus by Charlie (20221216 10:51:12) 
 re: computer solution (hope it's rightsee caveats) by Charlie (20221216 10:27:40) 
 computer solution (hope it's rightsee caveats) by Charlie (20221216 10:17:50) 
Under Specially Constituted Word (in Word Problems) Posted on 20221215 (10 Comments) 
 computer solution by Charlie (20221215 09:42:33) 
Under Butcher and Baker Puzzle (in Logic) Posted on 20221214 (32 Comments) 
 re: soln by Charlie (20221214 09:49:35) 
 computer solution by Charlie (20221214 09:45:54) 
Under Ice Cream Sundae Surmise (in Logic) Posted on 20221211 (3 Comments) 
 computer solution by Charlie (20221211 11:19:00) 
Under Atomsized Black Hole Mass (in Science) Posted on 20221208 (5 Comments) 
 re: my calculations by Charlie (20221208 11:08:35) 
 my calculations by Charlie (20221208 10:00:35) 
Under He Fooled Penn & Teller but ... (in Numbers) Posted on 20221207 (4 Comments) 
 re: Solution  an aside by Charlie (20221207 08:31:03) 
Under Rising above the ceiling (in Probability) Posted on 20221206 (6 Comments) 
 Some simulatons by Charlie (20221206 09:56:10) 
Under Telescopic Trial (in Science) Posted on 20221205 (5 Comments) 
 re: soln by Charlie (20221205 11:53:33) 
 Solution (spoiler) in overlyverbose detail. by Charlie (20221205 08:16:40) 
Under FractionFractionFraction Finding (in Numbers) Posted on 20221202 (2 Comments) 
 computer solution by Charlie (20221202 10:10:13) 
Under A Tangential Trapezoid (in Geometry) Posted on 20221130 (2 Comments) 
 computer solution by Charlie (20221130 09:39:15) 
Under Two Plus Two Equals Five (in Tricks) Posted on 20221129 (4 Comments) 
 One classic way by Charlie (20221129 08:53:20) 
Under 100 Lights and 100 Switches (in General) Posted on 20221128 (6 Comments) 
 solution by Charlie (20221128 09:09:35) 
Under Prime or Composite? (in Numbers) Posted on 20221127 (3 Comments) 
 solution by Charlie (20221127 09:49:40) 
Under A square 2 (in Numbers) Posted on 20221126 (8 Comments) 
 re(3): More than expected by Charlie (20221126 20:32:38) 
 computer solution by Charlie (20221126 09:06:15) 
Under Nonn, easy, nice. (in Just Math) Posted on 20221123 (5 Comments) 
 computer exploration by Charlie (20221123 11:20:15) 
Under Covert Quantity VI (in Logic) Posted on 20221122 (5 Comments) 
 computer solution (spoiler) by Charlie (20221122 10:26:33) 
Under Semiprimes in Arithmetic Sequence (in Sequences) Posted on 20221120 (11 Comments) 
 a failed attempt by Charlie (20221120 11:07:03) 
Under Sawtooth Limit Settlement (in Calculus) Posted on 20221117 (6 Comments) 
 re(2): solution by Charlie (20221117 10:37:36) 
 re: solution by Charlie (20221117 10:04:25) 
 solution by Charlie (20221117 09:46:11) 
Under Trading Places 2 (in General) Posted on 20221116 (7 Comments) 
 computer solution (spoiler) by Charlie (20221116 09:36:29) 
Under Bits adjacent to 1 (in Sequences) Posted on 20221115 (5 Comments) 
 computer solution by Charlie (20221115 10:42:22) 
Under A Game of Dice Puzzle (in Probability) Posted on 20221114 (7 Comments) 
 re: solution  simulation by Charlie (20221114 14:00:50) 
 solution by Charlie (20221114 10:40:18) 
Under Four Crossed Female Athlete Ascertainment (in Logic) Posted on 20221111 (2 Comments) 
 computer solution by Charlie (20221111 10:26:34) 
Under Missing Digit Deduction (in Numbers) Posted on 20221108 (2 Comments) 
 solution by Charlie (20221108 12:38:03) 
Under Binomial Coefficient Product Puzzle (in Numbers) Posted on 20221107 (3 Comments) 
 computer exploration (spoiler) by Charlie (20221107 10:37:14) 
Under Balanced Ternary Treat (in Algorithms) Posted on 20221104 (1 Comments) 
 solution by Charlie (20221104 11:31:44) 
Under Couple of Words II (in Word Problems) Posted on 20221103 (8 Comments) 
 computer findings by Charlie (20221103 14:51:48) 
Under A sixway division (in Weights and Scales) Posted on 20221101 (5 Comments) 
 re(3): soln  a couple more thoughts by Charlie (20221115 10:51:11) 
 re: soln by Charlie (20221114 13:37:31) 
Under Lights Out! (2) (in General) Posted on 20221031 (24 Comments) 
 re(2): Cleanedup code for the extension and an observation by Charlie (20221114 14:18:01) 
 Cleanedup code for the extension and an observation by Charlie (20221113 11:32:26) 
 Faster Method  here's 17 and 19 by Charlie (20221111 22:01:34) 
 re(4): extension of the problem  13 and 15 by Charlie (20221111 14:02:56) 
 re(3): extension of the problem by Charlie (20221111 12:41:43) 
 computer solution by Charlie (20221031 10:31:43) 
Under Iterated Floor Illation (in Just Math) Posted on 20221028 (22 Comments) 
 computerassisted solution by Charlie (20221028 11:52:28) 
Under 123…9 door to door (in Sequences) Posted on 20221027 (28 Comments) 
 computer verification by Charlie (20221027 11:23:23) 
 solution by Charlie (20221027 09:07:23) 
Under Sorting Coins III (in Weights and Scales) Posted on 20221026 (4 Comments) 
 No Subject by Charlie (20221106 09:26:34) 
Under Repeating tetradecimals (in Numbers) Posted on 20221025 (4 Comments) 
 for bases 8 through 16 by Charlie (20221025 13:59:50) 
 computer solution by Charlie (20221025 13:29:52) 
Under Four Floored Cube Finding (in Numbers) Posted on 20221024 (2 Comments) 
 answers by Charlie (20221024 11:32:53) 
Under Close Shave Conclusion (in Science) Posted on 20221023 (1 Comments) 
 discussion by Charlie (20221023 09:10:44) 
Under Average Arctic Distance (in Probability) Posted on 20221021 (8 Comments) 
 re(2): soln by Charlie (20221021 19:01:21) 
Under Distance through a cube (in Shapes) Posted on 20221020 (3 Comments) 
 computer solution by Charlie (20221020 11:12:32) 
Under A Misinformed Liar Cannot Falsify Facts (in Logic) Posted on 20221017 (2 Comments) 
 hmmm by Charlie (20221017 11:57:08) 
Under Knot Tying Travail (in Probability) Posted on 20221016 (5 Comments) 
 re: Solution?  I agree it is by Charlie (20221016 08:49:42) 
Under Three Distinct Divisor Trial (in Numbers) Posted on 20221015 (5 Comments) 
 computer solution by Charlie (20221015 11:06:49) 
Under Regular Hexagon and Mean Distance (in Shapes) Posted on 20221014 (6 Comments) 
 Simulations by Charlie (20221014 08:28:24) 
Under Mystery sequence (in Sequences) Posted on 20221013 (8 Comments) 
 re(3): Solution?  confirmation by Charlie (20221018 11:04:12) 
Under Sliding Puzzle III (in General) Posted on 20221012 (5 Comments) 
 computer solution based on previous Sliding Puzzle program by Charlie (20221012 11:11:43) 
Under Facile probability poser? (in Probability) Posted on 20221009 (4 Comments) 
 simulation by Charlie (20221009 10:00:02) 
Under Bugs and Cubs II (in Cryptography) Posted on 20221007 (5 Comments) 
 my computer findings after seeing Steven Lord's comment by Charlie (20221007 10:56:29) 
Under Air Plane Episode Ascertainment (in Science) Posted on 20221006 (3 Comments) 
 presumably the answer by Charlie (20221006 09:00:22) 
Under Consider, Unit Area, Get Side Length (in Shapes) Posted on 20221005 (3 Comments) 
 computeraided solution by Charlie (20221005 09:15:23) 
Under Marriage Muse III (in Logic) Posted on 20221003 (6 Comments) 
 re: soln by Charlie (20221003 10:24:39) 
Under The box (2) (in Numbers) Posted on 20221002 (5 Comments) 
 computer solution by Charlie (20221002 12:48:42) 
Under Temperature Temperament V (in Numbers) Posted on 20221001 (2 Comments) 
 computer findings by Charlie (20221001 12:35:19) 
Under Fifth Root Finding (in Algorithms) Posted on 20220929 (1 Comments) 
 a suboptimal algorithm by Charlie (20220929 08:35:46) 
Under Sliding Puzzle II (in General) Posted on 20220928 (8 Comments) 
 computer solution (spoiler) by Charlie (20220928 11:23:35) 
Under Square Overlap Settlement (in Probability) Posted on 20220924 (1 Comments) 
 solution by Charlie (20220924 11:53:27) 
Under NegaDuodecimal Nuance (in Algorithms) Posted on 20220923 (1 Comments) 
 computer solution by Charlie (20220923 11:21:18) 
Under Ring sets (in Geometry) Posted on 20220922 (1 Comments) 
 computer solution by Charlie (20220922 11:55:17) 
Under Arithmetic Sequence Crossed Integer Triplet Puzzle (in Numbers) Posted on 20220921 (6 Comments) 
 another take; same answer by Charlie (20220921 09:29:29) 
Under One, Two, Three, Floor Integral 2 (in Calculus) Posted on 20220920 (1 Comments) 
 computer solution; computer varification by Charlie (20220920 10:54:05) 
Under Split Words Settlement III (in Word Problems) Posted on 20220919 (1 Comments) 
 computeraided solution (spoilers) by Charlie (20220919 11:58:31) 
Under Sums of floors and fractionals (in Just Math) Posted on 20220918 (6 Comments) 
 computer solution by Charlie (20220918 08:57:01) 
Under Vowel Ratio Resolution (in Word Problems) Posted on 20220917 (3 Comments) 
 computer findings by Charlie (20220917 12:45:06) 
Under Harmonic Harmony 3 (in Numbers) Posted on 20220915 (3 Comments) 
 computer solution by Charlie (20220915 15:06:26) 
Under A Pandigital Multiple Puzzle (in Numbers) Posted on 20220914 (1 Comments) 
 a computer solution by Charlie (20220914 11:18:02) 
Under Colored Board Baffle (in Logic) Posted on 20220913 (7 Comments) 
 computer solution by Charlie (20220913 09:31:32) 
Under Personality, Game, and Term Puzzle (in Word Problems) Posted on 20220911 (6 Comments) 
 re: possible solution? by Charlie (20220911 11:02:46) 
Under Prosecutor Fallacy Poser (in General) Posted on 20220910 (7 Comments) 
 solution by Charlie (20220910 11:48:41) 
Under Scrabble numbers that score themselves (in Word Problems) Posted on 20220909 (1 Comments) 
 computer solution (spoiler) by Charlie (20220909 11:42:36) 
Under Two Cask Mixture Muse (in Weights and Scales) Posted on 20220908 (2 Comments) 
 computer solution by Charlie (20220908 08:26:42) 
Under Double Pressure Predicament (in Science) Posted on 20220905 (6 Comments) 
 inexact solution by Charlie (20220905 09:57:18) 
Under Tautonymic number counting (in Algorithms) Posted on 20220904 (2 Comments) 
 solution (parts 2 and 3) by Charlie (20220904 10:04:04) 
Under Many types (in Liars and Knights) Posted on 20220903 (1 Comments) 
 solution by Charlie (20220903 08:28:47) 
Under Movie Synonym Muse (in Word Problems) Posted on 20220831 (5 Comments) 
 synonyms by Charlie (20220831 11:39:04) 
Under Binary Crossnumber Puzzle  02 (in General) Posted on 20220830 (6 Comments) 
 No Subject by Charlie (20220830 10:18:57) 
Under Red Flower Survival Surmise (in Probability) Posted on 20220829 (2 Comments) 
 solution by Charlie (20220829 10:45:51) 
Under Guard Schedule Surmise (in Logic) Posted on 20220828 (2 Comments) 
 computer solution by Charlie (20220828 10:44:44) 
Under Fortyone's Forte (in Numbers) Posted on 20220827 (5 Comments) 
 computer solution (spoiler) by Charlie (20220827 09:22:34) 
Under Powering up the digits V (in Numbers) Posted on 20220826 (2 Comments) 
 computeraided solution by Charlie (20220826 09:09:28) 
Under Cool It Again, Brother (in Science) Posted on 20220822 (2 Comments) 
 Solution (spoiler) by Charlie (20220822 08:00:50) 
Under Product Crossed Square Settlement (in Probability) Posted on 20220819 (5 Comments) 
 computer solution by Charlie (20220819 10:55:53) 
Under Ratio Resolution VII (in Weights and Scales) Posted on 20220816 (3 Comments) 
 computer findings by Charlie (20220816 09:17:38) 
Under Smallest Prime Settlement (in Numbers) Posted on 20220814 (3 Comments) 
 computer solution by Charlie (20220814 10:50:14) 
Under Cubic Diophantine Conclusion II (in Numbers) Posted on 20220813 (2 Comments) 
 computer solution by Charlie (20220813 11:41:12) 
Under 7 somewhere (in Numbers) Posted on 20220812 (16 Comments) 
 re(4): solution by Charlie (20220815 16:57:51) 
 re(2): solution by Charlie (20220814 20:15:43) 
 re: solution by Charlie (20220812 19:43:16) 
 solution by Charlie (20220812 15:03:15) 
Under Ice Cube Mystery (in Science) Posted on 20220809 (2 Comments) 
 re: Lots of alcohol by Charlie (20220809 11:57:21) 
Under Perplexus arrangement (in Just Math) Posted on 20220808 (1 Comments) 
 three ways (spoiler) by Charlie (20220808 08:48:10) 
Under Singular Squares II (in Numbers) Posted on 20220806 (3 Comments) 
 computer solution by Charlie (20220806 09:55:01) 
Under Missing Duodecimal Digit Determination (in Numbers) Posted on 20220804 (6 Comments) 
 solution by Charlie (20220804 09:31:39) 
Under Digital Root Unity (in Numbers) Posted on 20220803 (3 Comments) 
 solution by Charlie (20220803 08:06:09) 
Under 888...888 (in Numbers) Posted on 20220802 (10 Comments) 
 computeraided solution by Charlie (20220802 09:23:26) 
Under Super Exponentiation Surmise (in Just Math) Posted on 20220731 (13 Comments) 
 trial and error annotated by Charlie (20220731 09:26:33) 
Under Physicist Anagram Ascertainment (in Word Problems) Posted on 20220730 (6 Comments) 
 re: H I n t s by Charlie (20220731 06:32:33) 
 A few more by Charlie (20220730 09:30:07) 
 A Start by Charlie (20220730 07:14:42) 
Under Half Integer Base Baffle (in Algorithms) Posted on 20220729 (2 Comments) 
 The "standard" method? by Charlie (20220729 11:17:19) 
 starting computer solution by Charlie (20220729 10:21:02) 
Under From sum to addends 2 (in Numbers) Posted on 20220728 (3 Comments) 
 computer solution by Charlie (20220728 11:40:05) 
Under Product Crossed Pointed Ratio Puzzle (in Numbers) Posted on 20220727 (7 Comments) 
 re(2): computer solution  3 other solutions by Charlie (20220728 16:34:23) 
 re: computer solution formatting improved by Charlie (20220727 18:16:35) 
 computer solution by Charlie (20220727 11:51:44) 
Under Bronze Ball Contest Conclusion (in Science) Posted on 20220725 (4 Comments) 
 re: One way to do it (spoiler) by Charlie (20220725 11:33:11) 
Under 381654729 (in Just Math) Posted on 20220723 (6 Comments) 
 re(3): Hint? @ Charlie by Charlie (20220730 15:10:33) 
 re: Hint? by Charlie (20220725 15:50:41) 
Under Perfect Powers with no Repeat Digits (in Numbers) Posted on 20220722 (1 Comments) 
 computer solution by Charlie (20220722 12:56:28) 
Under A square deal (in Sequences) Posted on 20220718 (4 Comments) 
 computer solution by Charlie (20220718 08:33:49) 
Under TV Show Travail (in Logic) Posted on 20220716 (3 Comments) 
 computer solution by Charlie (20220716 10:28:02) 
Under Spellements 2 (in General) Posted on 20220715 (13 Comments) 
 Another try by Charlie (20220717 17:14:23) 
 re(5): Not the scoring method I had in mind, but ... by Charlie (20220717 09:59:14) 
 re(3): Not the scoring method I had in mind, but ... by Charlie (20220717 06:40:14) 
 re: Not the scoring method I had in mind, but ... by Charlie (20220716 17:32:33) 
 the start of the remainder of the list by Charlie (20220715 11:23:25) 
 The start of the list by Charlie (20220715 11:21:28) 
 computer method by Charlie (20220715 11:17:34) 
Under Getting Better on the Elo Ratings (in Logic) Posted on 20220714 (8 Comments) 
 re: One way (solution) by Charlie (20220714 09:41:58) 
 computer solution by Charlie (20220714 09:28:00) 
Under The Game of Keno (in Probability) Posted on 20220712 (3 Comments) 
 re: Solution by Charlie (20220712 10:58:04) 
Under Three clocks (in Just Math) Posted on 20220710 (6 Comments) 
 solution by Charlie (20220710 09:53:53) 
Under Spellements (in General) Posted on 20220709 (1 Comments) 
 computer solution by Charlie (20220709 12:08:29) 
Under SOD(power) = power (in Numbers) Posted on 20220707 (1 Comments) 
 computer solution by Charlie (20220707 11:23:51) 
Under Euler was wrong (in Just Math) Posted on 20220706 (3 Comments) 
 computer solution by Charlie (20220706 12:04:20) 
Under Mrs. Arithmetic and Mrs. Algebra (in Numbers) Posted on 20220705 (6 Comments) 
 computeraided solution by Charlie (20220705 13:11:05) 
Under Pro and con (in Word Problems) Posted on 20220703 (9 Comments) 
 computer solution (spoiler) by Charlie (20220703 09:22:13) 
Under A Pair of Factorial Quartic Equations (in Numbers) Posted on 20220702 (4 Comments) 
 very computerized solution by Charlie (20220702 10:32:34) 
Under West of Evan, East of Odin (in Numbers) Posted on 20220629 (1 Comments) 
 computer solution by Charlie (20220629 12:20:36) 
Under Three Card Trial (in Logic) Posted on 20220626 (4 Comments) 
 hmmm... by Charlie (20220626 09:29:59) 
Under Apples, Bananas, and Oranges Puzzle (in Liars and Knights) Posted on 20220625 (3 Comments) 
 solution by Charlie (20220625 12:22:32) 
Under Egyptian Fraction Expression (in Numbers) Posted on 20220624 (3 Comments) 
 computer solution by Charlie (20220624 12:36:49) 
Under Matchstick Movement Muse (in General) Posted on 20220621 (5 Comments) 
 computer solution by Charlie (20220621 11:33:02) 
Under Why Eat? (in Word Problems) Posted on 20220620 (2 Comments) 
 re: Why Eat? by Charlie (20220620 08:31:41) 
 Why Eat? by Charlie (20220620 08:05:05) 
Under Pizza Topping Treat (in Logic) Posted on 20220619 (4 Comments) 
 computer solution by Charlie (20220619 09:44:19) 
Under X and Lucky Seven Settlement (in Numbers) Posted on 20220618 (3 Comments) 
 mostly computer solution by Charlie (20220618 09:36:30) 
Under Hexagon area ratio (in Geometry) Posted on 20220615 (1 Comments) 
 computeraided solution (spoiler) by Charlie (20220615 10:09:35) 
Under Primorial Penultimate Piece (in Numbers) Posted on 20220614 (2 Comments) 
 computer solution by Charlie (20220614 11:19:53) 
Under Decimal Specification (in Numbers) Posted on 20220613 (3 Comments) 
 computer solution by Charlie (20220613 09:02:41) 
Under Card Identification Illation (in Logic) Posted on 20220612 (4 Comments) 
 solution by Charlie (20220612 10:09:47) 
Under Arithmetic Derivative (in Numbers) Posted on 20220610 (7 Comments) 
 re: bits and pieces by Charlie (20220610 15:50:51) 
 Python version for 1 & 2 by Charlie (20220610 14:47:36) 
 re(2): part (3) expanded to 5digit n (continued) by Charlie (20220610 11:10:09) 
 re: part (3) expanded to 5digit n (continued) by Charlie (20220610 11:09:09) 
 part (3) expanded to 5digit n by Charlie (20220610 11:07:23) 
 computer solution by Charlie (20220610 11:02:48) 
Under Sorta Platonic... (in Numbers) Posted on 20220609 (3 Comments) 
 testing only to the limit of double precision floating point by Charlie (20220609 10:08:23) 
Under Maximum Palindrome Count Muse (in Numbers) Posted on 20220607 (3 Comments) 
 computer solution by Charlie (20220607 10:23:45) 
Under Quaint Quadruplet Query (in Numbers) Posted on 20220606 (5 Comments) 
 computer exploration  no proof of completeness by Charlie (20220606 08:08:37) 
Under ' subject to availability ' (in Probability) Posted on 20220602 (7 Comments) 
 re: We need a third simulation by Charlie (20220602 14:07:55) 
 solution by simulation by Charlie (20220602 11:32:17) 
Under Last house on the street (in Just Math) Posted on 20220531 (7 Comments) 
 if thee were only odd numbers on his side by Charlie (20220531 16:26:01) 
 On the assumption all houses were on his side by Charlie (20220531 12:28:39) 
 my solution by Charlie (20220531 11:58:59) 
Under Forty Four Digit Decision (in Numbers) Posted on 20220530 (2 Comments) 
 solution by Charlie (20220530 11:37:17) 
Under Lexicographic Listing (in Algorithms) Posted on 20220529 (3 Comments) 
 added list by Charlie (20220529 17:47:09) 
 solution by Charlie (20220529 13:34:23) 
Under An Integer Product (in Numbers) Posted on 20220526 (7 Comments) 
 re(3): demonstration by Charlie (20220527 06:49:06) 
 re(2): demonstration by Charlie (20220526 17:28:51) 
 verification as integers by Charlie (20220526 10:43:32) 
Under Consecutive Conclusion II (in Sequences) Posted on 20220525 (3 Comments) 
 computer solution by Charlie (20220525 11:41:48) 
Under Queen and Bishop Query (in Games) Posted on 20220524 (2 Comments) 
 The full program in one piece, and a variation. by Charlie (20220525 06:58:54) 
 computer solution by Charlie (20220524 12:39:05) 
Under Tricky Vowel Arrangement (in Shapes) Posted on 20220523 (2 Comments) 
 solution  exploded view by Charlie (20220523 08:44:13) 
Under Card Shuffle Conclusion (in Probability) Posted on 20220520 (1 Comments) 
 computeraided solution by Charlie (20220520 14:01:31) 
Under Only integer answers (in Just Math) Posted on 20220519 (9 Comments) 
 Matlab version by Charlie (20220519 10:21:07) 
Under Fifth Thursdays and Sundays (in Algorithms) Posted on 20220517 (1 Comments) 
 solution as I think intended by Charlie (20220517 12:27:15) 
Under Checkerboard Chance Conclusion II (in Probability) Posted on 20220516 (2 Comments) 
 solution by Charlie (20220516 10:42:35) 
Under Roman Square Root Resolution (in Algorithms) Posted on 20220515 (6 Comments) 
 Implementation of the idea by Charlie (20220515 10:59:12) 
Under A very sparse Sudoku (in Numbers) Posted on 20220514 (4 Comments) 
 computeraided solution (spoiler) by Charlie (20220514 11:19:59) 
Under 2^n mod n (in Just Math) Posted on 20220513 (3 Comments) 
 re: Parts 1, 2, and 4 (and probably 3) by Charlie (20220513 11:46:37) 
Under Googol vs Googolplex (in Numbers) Posted on 20220512 (3 Comments) 
 computer solution by Charlie (20220512 10:46:20) 
Under Completing factorial (in Numbers) Posted on 20220511 (1 Comments) 
 solution by Charlie (20220511 11:40:02) 
Under Even percents (in Numbers) Posted on 20220510 (3 Comments) 
 not necessarily minimal by Charlie (20220510 12:50:43) 
Under 2 incompatible words (in Word Problems) Posted on 20220509 (3 Comments) 
 with computer assistance (spoiler) by Charlie (20220509 08:33:26) 
Under Car Thief Identification (in Logic) Posted on 20220508 (5 Comments) 
 some thoughts by Charlie (20220508 12:31:08) 
Under Colored Marble Muse (in Probability) Posted on 20220507 (4 Comments) 
 re: Solution by cases by Charlie (20220507 23:03:13) 
 computeraided solution by Charlie (20220507 13:24:06) 
Under Capital Crossed Creature Conclusion (in Word Problems) Posted on 20220506 (1 Comments) 
 With some computer assistance (spoiler) by Charlie (20220506 10:00:25) 
Under Seven Shirt Settlement (in Logic) Posted on 20220505 (3 Comments) 
 computer solution by Charlie (20220505 12:17:10) 
Under 50  Digit Number III (in Numbers) Posted on 20220504 (7 Comments) 
 computer solution by Charlie (20220504 12:50:44) 
Under Mixed Fraction Product Poser (in Just Math) Posted on 20220503 (10 Comments) 
 computer solution by Charlie (20220503 08:24:10) 
Under Two Family Travail (in Liars and Knights) Posted on 20220501 (2 Comments) 
 computer solution by Charlie (20220501 10:22:57) 
Under Ten Box Trial (in Weights and Scales) Posted on 20220429 (10 Comments) 
 computer solution by Charlie (20220429 09:36:14) 
 possible intent by Charlie (20220429 08:12:53) 
Under The Playlist (in Probability) Posted on 20220428 (2 Comments) 
 solutions by Charlie (20220428 09:08:10) 
Under Counting words (in Just Math) Posted on 20220427 (7 Comments) 
 re: How to get to a closed form? by Charlie (20220427 13:39:00) 
 re: solution  correction by Charlie (20220427 08:50:11) 
 solution by Charlie (20220427 08:36:49) 
Under Find all Numbers II (in Numbers) Posted on 20220424 (4 Comments) 
 computer solution by Charlie (20220424 09:42:46) 
Under Animal Portraits Ascertainment (in Logic) Posted on 20220421 (3 Comments) 
 the computer method by Charlie (20220421 08:55:19) 
Under 3 Pals make a Pal (in Numbers) Posted on 20220420 (2 Comments) 
 parts a and b by Charlie (20220420 12:50:54) 
Under Move the digit, Change the base (in Numbers) Posted on 20220419 (10 Comments) 
 Summary  if it had been right from the start by Charlie (20220421 09:17:31) 
 re(6): computer exploration  c and d finally by Charlie (20220420 14:46:17) 
 re(5): computer exploration  all right, got b by Charlie (20220419 19:03:46) 
 re(4): computer exploration  c and d finally by Charlie (20220419 18:57:59) 
 re(2): computer exploration by Charlie (20220419 13:46:52) 
 computer exploration by Charlie (20220419 11:16:24) 
Under L OR H (in Weights and Scales) Posted on 20220418 (4 Comments) 
 solution by Charlie (20220418 11:43:54) 
Under From a to z (in Just Math) Posted on 20220417 (7 Comments) 
 solution by Charlie (20220417 08:24:58) 
Under Mixture Mix Muse (in Science) Posted on 20220416 (8 Comments) 
 re: Solution by Charlie (20220416 19:19:05) 
Under Divisible by 13 (in Algorithms) Posted on 20220415 (11 Comments) 
 Test for 20,220digit numbers by Charlie (20220415 14:48:27) 
 re: No Subject by Charlie (20220415 14:02:01) 
 re: No Subject by Charlie (20220415 11:23:57) 
 re: My favorite by Charlie (20220415 11:18:26) 
Under Summing up II (in Sequences) Posted on 20220414 (2 Comments) 
 probable solution by Charlie (20220414 09:59:56) 
Under 225 as a factor (in Numbers) Posted on 20220412 (7 Comments) 
 re(3): Analytic solution by Charlie (20220430 07:29:52) 
 re: Analytic solution by Charlie (20220412 12:37:05) 
Under Digit Replacement and Square Settlement (in Numbers) Posted on 20220411 (5 Comments) 
 going farther by Charlie (20220411 08:17:18) 
Under Eventual Inverse Function (in Just Math) Posted on 20220408 (1 Comments) 
 a set of solutions by Charlie (20220410 06:21:47) 
Under All the nines (in Numbers) Posted on 20220407 (9 Comments) 
 re(4): possible computer solution(s) by Charlie (20220409 12:30:58) 
 re(3): possible computer solution(s) by Charlie (20220409 12:05:36) 
 re: possible computer solution(s) by Charlie (20220407 10:16:27) 
 possible computer solution(s) by Charlie (20220407 09:48:48) 
Under Darn you Wordle! (in Word Problems) Posted on 20220405 (6 Comments) 
 First a hunch, then computer search by Charlie (20220405 09:54:30) 
Under A Kiss solution (in General) Posted on 20220404 (9 Comments) 
 re: Solution by Charlie (20220404 07:13:59) 
Under Letter Ratios II (in Word Problems) Posted on 20220403 (2 Comments) 
 the computer says by Charlie (20220403 10:20:47) 
Under Did Bobby err? (in Numbers) Posted on 20220402 (5 Comments) 
 another route to the solution by Charlie (20220402 14:15:44) 
Under Singer Surmise (in General) Posted on 20220331 (14 Comments) 
 computer exploration by Charlie (20220331 11:32:22) 
Under Flipflop the digits, octuple the number (in Numbers) Posted on 20220330 (5 Comments) 
 re(2): computer solution by Charlie (20220330 20:53:05) 
 computer solution by Charlie (20220330 11:45:13) 
Under Slim chance? (in Probability) Posted on 20220328 (5 Comments) 
 presented graphically by Charlie (20220328 11:32:12) 
Under Word Wangle (in Word Problems) Posted on 20220327 (1 Comments) 
 computer solutions (spoiler) by Charlie (20220327 10:03:06) 
Under Some inflation ! (in Numbers) Posted on 20220324 (4 Comments) 
 computer solution (spoiler) by Charlie (20220324 10:20:47) 
Under A multiple of 42 (in Just Math) Posted on 20220323 (6 Comments) 
 solution by Charlie (20220323 08:57:13) 
Under sum, reciprocals, squares (in Numbers) Posted on 20220322 (4 Comments) 
 Findings by Charlie (20220322 08:58:45) 
Under Ketchup Sachet Settlement (in Science) Posted on 20220321 (6 Comments) 
 ketchup by Charlie (20220321 10:40:47) 
Under Intriguing Word Interior Illation (in Word Problems) Posted on 20220320 (4 Comments) 
 computer solution by Charlie (20220320 09:55:39) 
Under Rational Reverse Crossed Product Resolution (in Numbers) Posted on 20220318 (5 Comments) 
 computer solutions by Charlie (20220318 10:56:12) 
Under Relationship and Sex Settlement (in Logic) Posted on 20220316 (1 Comments) 
 solution by Charlie (20220316 19:15:16) 
Under Palindrome factors (in Numbers) Posted on 20220315 (8 Comments) 
 re: My thoughts on the difficulty of part (B) by Charlie (20220315 21:20:42) 
 part (A) solution and an attempt at (B) by Charlie (20220315 09:22:53) 
Under Mathematical Anagram Muse (in Word Problems) Posted on 20220313 (2 Comments) 
 re: 80%  other two (computer aided) by Charlie (20220313 11:25:13) 
 80% by Charlie (20220313 11:09:23) 
Under Pentagonal and Hexagonal Poser (in Numbers) Posted on 20220310 (4 Comments) 
 computer solution by Charlie (20220310 09:22:40) 
Under Inverse Root Difference Crossed Zeros Puzzle (in Just Math) Posted on 20220309 (4 Comments) 
 solution (spoiler) by Charlie (20220309 13:08:19) 
Under Villes Et Etats Des EtatsUnis (in General) Posted on 20220305 (8 Comments) 
 re: soln by Charlie (20220305 13:04:43) 
Under Ratio Resolution VI (in Just Math) Posted on 20220304 (2 Comments) 
 ... or let the computer do the arithmetic by Charlie (20220304 12:55:59) 
Under Year by Year 2 (in Numbers) Posted on 20220302 (1 Comments) 
 solution (spoiler) by Charlie (20220302 13:54:28) 
Under No consecutive 1's (in Numbers) Posted on 20220227 (2 Comments) 
 answerno proof by Charlie (20220227 10:42:06) 
Under Split Words Settlement (in Word Problems) Posted on 20220226 (2 Comments) 
 solutions by Charlie (20220226 13:04:58) 
Under Very peculiar feature ! (in Numbers) Posted on 20220224 (1 Comments) 
 computer solution (spoiler) by Charlie (20220224 09:02:13) 
Under Announced vs Final rank average (in Probability) Posted on 20220223 (2 Comments) 
 solution by Charlie (20220223 10:14:42) 
Under SOD Crossed 2023 Puzzle (in Just Math) Posted on 20220222 (2 Comments) 
 Direct calculation; a pattern; and persistence limit by Charlie (20220222 14:11:08) 
Under Announced rank average (in Probability) Posted on 20220216 (3 Comments) 
 re(2): solution by Charlie (20220216 23:18:27) 
 solution by Charlie (20220216 11:20:12) 
Under Wordle Word Randomization (in Probability) Posted on 20220214 (3 Comments) 
 Hint by Charlie (20220215 07:50:14) 
Under Continued Floor Elucidation (in Just Math) Posted on 20220213 (2 Comments) 
 solution by Charlie (20220213 10:15:18) 
Under 2 parallel chords (in Geometry) Posted on 20220210 (3 Comments) 
 computeraided solution by Charlie (20220210 09:38:22) 
Under Five sentences (in Logic) Posted on 20220209 (3 Comments) 
 the computer method by Charlie (20220209 09:52:29) 
Under Visit Validation (in Logic) Posted on 20220208 (1 Comments) 
 solution by Charlie (20220208 09:09:44) 
Under Sum Cubes and Fourth Powers (in Just Math) Posted on 20220202 (4 Comments) 
 re: Solution by Charlie (20220202 11:30:12) 
 computer solution by Charlie (20220202 11:23:58) 
Under Dudeney minus one: Dudezero (in Just Math) Posted on 20220201 (6 Comments) 
 computer solution (spoiler) by Charlie (20220201 07:56:48) 
Under Elemental State Settlement (in Word Problems) Posted on 20220129 (2 Comments) 
 Answers by Charlie (20220129 12:34:18) 
Under Difference is sod sum (in Numbers) Posted on 20220128 (4 Comments) 
 re: FWIW by Charlie (20220128 22:25:49) 
 FWIQ by Charlie (20220128 22:24:45) 
Under Golden Ratio Gradation (in Algorithms) Posted on 20220127 (4 Comments) 
 my take on it by Charlie (20220127 11:42:35) 
Under 2022 Multiple and Palindrome Puzzle (in Numbers) Posted on 20220125 (5 Comments) 
 computer solution by Charlie (20220125 13:33:53) 
Under Fair, Handsome, and Unscarred (in Logic) Posted on 20220120 (3 Comments) 
 solution by Charlie (20220120 18:01:25) 
Under Temperature Reflection 2 (in Just Math) Posted on 20220119 (1 Comments) 
 computer solution by Charlie (20220119 11:32:08) 
Under All in (in Numbers) Posted on 20220118 (4 Comments) 
 re: solutions where I went wrong by Charlie (20220118 22:36:45) 
 solutions by Charlie (20220118 09:27:45) 
Under Letter Addition Crossed Country Conclusion (in Word Problems) Posted on 20220117 (2 Comments) 
 first without then with computer by Charlie (20220117 11:26:45) 
Under Closest approaches (in Geometry) Posted on 20220114 (3 Comments) 
 solution by Charlie (20220114 11:07:23) 
Under Pandiv 143 (in Numbers) Posted on 20220113 (1 Comments) 
 Answersbut not analytical (spoiler) by Charlie (20220113 16:03:30) 
Under Inconsiderable FivePrime Ratio Illation (in Numbers) Posted on 20220112 (4 Comments) 
 computer solution by Charlie (20220113 08:10:38) 
Under Powers of 3, 4, and 7 Included (in Numbers) Posted on 20220110 (5 Comments) 
 lower number by Charlie (20220110 11:37:04) 
Under Perfect Powered Temperature (in Just Math) Posted on 20220109 (10 Comments) 
 re: A much faster way  the complete set for up to a trillion by Charlie (20220110 07:39:42) 
 A much faster way by Charlie (20220109 20:31:53) 
 re: Corrigendum by Charlie (20220109 12:10:27) 
 computer solution by Charlie (20220109 10:05:17) 
Under Age of ages (2) (in Just Math) Posted on 20220108 (6 Comments) 
 Can someone correct my logic or find my error? by Charlie (20220108 18:11:58) 
Under Fahrenheit*Celsius equals Perfect Square (in Just Math) Posted on 20220107 (3 Comments) 
 Just a note by Charlie (20220107 19:11:36) 
 computer solution by Charlie (20220107 09:55:28) 
Under Find this word (in Word Problems) Posted on 20220106 (7 Comments) 
 thoughts by Charlie (20220106 09:26:49) 
Under Either way (in Numbers) Posted on 20220105 (8 Comments) 
 re: computer solution (spoiler)  continued by Charlie (20220105 08:51:06) 
 computer solution (spoiler) by Charlie (20220105 08:49:13) 
Under Etats Des EtatsUnis (in Word Problems) Posted on 20220104 (3 Comments) 
 re: Answers by Charlie (20220104 10:53:14) 
Under Temperature Temperament IV (in Just Math) Posted on 20220103 (3 Comments) 
 computer solution by Charlie (20220103 11:05:09) 
Under function of s.o.d. of prime (in Numbers) Posted on 20211231 (2 Comments) 
 computer solution by Charlie (20211231 10:29:10) 
Under Believe it or not 2 (in Numbers) Posted on 20211230 (2 Comments) 
 computer solution by Charlie (20211230 09:08:52) 
Under KISS solution (in Just Math) Posted on 20211229 (8 Comments) 
 levels by Charlie (20211229 14:55:05) 
Under Armstrong plus one : Armstwo (in Numbers) Posted on 20211227 (3 Comments) 
 MATLAB solution by Charlie (20211227 11:31:01) 
Under Temperature Travail II (in Just Math) Posted on 20211225 (3 Comments) 
 computer solution by Charlie (20211225 19:54:34) 
Under 6 out of 20 (in Cryptography) Posted on 20211223 (6 Comments) 
 solution as far as I could arrange (spoilers) by Charlie (20211224 12:50:19) 
 re(3): No. 1 by Charlie (20211224 11:27:22) 
 re: No. 1 by Charlie (20211224 10:20:16) 
 No. 1 by Charlie (20211224 07:08:23) 
Under The notalwayslying islanders (in Logic) Posted on 20211222 (4 Comments) 
 re: computer solution by Charlie (20211222 13:24:54) 
 computer solution by Charlie (20211222 13:05:05) 
Under Spanish Alphametic Settlement (in Numbers) Posted on 20211221 (3 Comments) 
 Hybrid solution by Charlie (20211221 10:27:47) 
Under Factorion plus one: Factoritwo (in Numbers) Posted on 20211216 (2 Comments) 
 solution by Charlie (20211216 15:43:11) 
Under Straight Up Inequality (in Just Math) Posted on 20211214 (2 Comments) 
 computer guided solution by Charlie (20211214 11:07:53) 
Under Ninety Seven and Divisibility Nuance (in Just Math) Posted on 20211212 (10 Comments) 
 re(5): solution by Charlie (20211212 19:30:50) 
 re(4): solution by Charlie (20211212 18:07:46) 
 re(4): solution by Charlie (20211212 16:26:15) 
 re(2): solution by Charlie (20211212 15:19:21) 
 solution by Charlie (20211212 08:42:40) 
Under AB Crossed Floor Product (in Just Math) Posted on 20211208 (2 Comments) 
 solution by Charlie (20211208 07:37:10) 
Under ABBA words a.k.a. Test #12: (in Word Problems) Posted on 20211207 (3 Comments) 
 computer solutions by Charlie (20211207 10:41:14) 
Under Factorial Removal Resolution (in Just Math) Posted on 20211201 (3 Comments) 
 solution with a little help from the computer by Charlie (20211201 11:50:44) 
Under Count the trailing zeros (in Just Math) Posted on 20211130 (4 Comments) 
 re(2): solution  answer for base 9 seems wrong by Charlie (20211130 09:44:34) 
 re: solution  answer for base 9 seems wrong by Charlie (20211130 09:34:41) 
 solution by Charlie (20211130 09:08:32) 
Under Nimble Exponent Extrication (in Just Math) Posted on 20211122 (3 Comments) 
 computer solution by Charlie (20211122 11:56:13) 
Under Prove or verify (in Just Math) Posted on 20211118 (1 Comments) 
 simulation program by Charlie (20211118 16:24:59) 
Under Cubic Arithmetic Conclusion (in Just Math) Posted on 20211116 (4 Comments) 
 computer solution by Charlie (20211116 15:46:39) 
Under Partially illuminated cone (in Calculus) Posted on 20211112 (10 Comments) 
 re: a hundred million points of light by Charlie (20211114 11:44:28) 
 a hundred million points of light by Charlie (20211114 11:24:44) 
 re(2): soln by Charlie (20211112 10:37:41) 
 re: soln by Charlie (20211112 10:34:14) 
Under I am 521634352 (in General) Posted on 20211108 (4 Comments) 
 REMOTE MENTOR by Charlie (20211108 12:09:35) 
Under Pax vobiscum (in General) Posted on 20211105 (4 Comments) 
 re: dona nobis pacem by Charlie (20211108 07:30:00) 
 dona nobis pacem by Charlie (20211107 21:17:09) 
 computer solution by Charlie (20211105 14:55:38) 
Under Hexomino tile enumeration (in Numbers) Posted on 20211027 (4 Comments) 
 computer solution by Charlie (20211027 13:19:01) 
Under Left/Right side story (in Word Problems) Posted on 20211025 (1 Comments) 
 parts 1, 2 and 4 via computer by Charlie (20211025 16:53:20) 
Under QuadOminoes (in Numbers) Posted on 20211020 (6 Comments) 
 re: possible solution by Charlie (20211020 11:42:52) 
 solution by Charlie (20211020 11:41:12) 
Under Actual triominoes (in Numbers) Posted on 20211013 (2 Comments) 
 solution by Charlie (20211013 11:42:39) 
Under Expo 7629 (in Numbers) Posted on 20210927 (7 Comments) 
 listing the possibilitiessolution by Charlie (20210927 13:13:35) 
Under Imagine the points (in Just Math) Posted on 20210922 (3 Comments) 
 computer solution by Charlie (20210922 11:06:03) 
Under Range (in Just Math) Posted on 20210920 (4 Comments) 
 re: Solution by Charlie (20210920 14:11:26) 
 solution by Charlie (20210920 10:21:05) 
Under 5 equilaterals (in Geometry) Posted on 20210910 (8 Comments) 
 For what it's worth by Charlie (20210912 16:01:39) 
 What it looks like by Charlie (20210912 12:22:34) 
 re: solution(s)  Correction! by Charlie (20210912 12:03:37) 
 solution(s) by Charlie (20210910 19:55:57) 
Under Grid squares (in Just Math) Posted on 20210903 (7 Comments) 
 Same answer by Charlie (20210903 12:23:16) 
Under Two spherical scoops (in Shapes) Posted on 20210824 (2 Comments) 
 solution by Charlie (20210824 10:31:17) 
Under Inconvenient points (in Just Math) Posted on 20210823 (3 Comments) 
 solution by Charlie (20210823 11:57:46) 
Under More balanced weighing (in Just Math) Posted on 20210820 (4 Comments) 
 Let me count the ways  computer solution by Charlie (20210820 11:51:12) 
Under 2 neighbours create a square (in Numbers) Posted on 20210819 (9 Comments) 
 solution ++ by Charlie (20210819 10:45:11) 
Under Prime pair equation (in Numbers) Posted on 20210818 (2 Comments) 
 computer exploration by Charlie (20210818 21:48:19) 
Under Planar factor graphs (in Just Math) Posted on 20210816 (16 Comments) 
 re(4): Part 3  K5 and K3,3 by Charlie (20210819 10:29:52) 
 re(3): Part 3  K5 and K3,3 by Charlie (20210819 06:55:43) 
 re: Part 3  K5 and K3,3 by Charlie (20210818 17:54:04) 
 re: Part 3  K5 and K3,3 by Charlie (20210818 07:46:12) 
 re: Solution parts 1 and 2 by Charlie (20210817 15:35:59) 
 part 3 by computer by Charlie (20210817 11:50:07) 
 re: Setting an upper limit for 3 by Charlie (20210817 08:33:46) 
 Setting an upper limit for 3 by Charlie (20210817 08:23:07) 
 2b (therefore also 2a) by Charlie (20210816 20:55:45) 
Under Seven (in Sequences) Posted on 20210815 (2 Comments) 
 computer solution by Charlie (20210816 09:32:52) 
Under Factorials and 2 powers (in Just Math) Posted on 20210813 (5 Comments) 
 computer findings by Charlie (20210813 09:22:08) 
Under Many Heads part 2 (in Probability) Posted on 20210802 (2 Comments) 
 trial and error with the computer by Charlie (20210802 13:36:56) 
Under Pyramid from a square (in Shapes) Posted on 20210729 (3 Comments) 
 solution by Charlie (20210729 11:32:35) 
Under Triplet hunt (in Numbers) Posted on 20210727 (3 Comments) 
 computer exploration by Charlie (20210727 11:29:33) 
Under Product of odd primes with distinct digits (in Numbers) Posted on 20210723 (5 Comments) 
 re: Brian and Charlie: note a few details by Charlie (20210727 21:56:47) 
 computer solution by Charlie (20210723 14:16:24) 
Under Four equal digits (in Numbers) Posted on 20210720 (5 Comments) 
 computer solution by Charlie (20210720 13:25:16) 
Under Adjacent Square Sum II (in Just Math) Posted on 20210715 (1 Comments) 
 computer solution (spoiler) by Charlie (20210715 12:07:01) 
Under Special dates (in Science) Posted on 20210706 (44 Comments) 
 re: No Subject by Charlie (20210706 15:51:50) 
 No Subject by Charlie (20210706 15:06:16) 
 a solution by Charlie (20210706 11:47:55) 
Under Prime pairs in power (in Numbers) Posted on 20210705 (6 Comments) 
 limited computer search by Charlie (20210705 09:45:52) 
Under Circle Line Locus (in Just Math) Posted on 20210702 (10 Comments) 
 Well, that's not the curve by Charlie (20210704 09:19:30) 
 re(2): what the curve looks like by Charlie (20210703 20:01:27) 
 re(2): what the curve looks like by Charlie (20210703 19:51:03) 
 re(2): what the curve looks like by Charlie (20210702 21:00:35) 
 what the curve looks like by Charlie (20210702 15:11:51) 
Under Pascal's Lottery (in Probability) Posted on 20210701 (6 Comments) 
 re: Question by Charlie (20210701 15:40:51) 
 partial solution and some thoughts by Charlie (20210701 10:45:25) 
Under Reflection in Rectangle (in Just Math) Posted on 20210630 (5 Comments) 
 solution by Charlie (20210630 11:03:25) 
Under Reversible Cubes (in Numbers) Posted on 20210629 (5 Comments) 
 computer exploration by Charlie (20210629 11:34:06) 
Under Distinct routes (in Numbers) Posted on 20210624 (10 Comments) 
 re(2): solution and discussion by Charlie (20210628 09:46:08) 
 extended by Charlie (20210624 15:23:50) 
 solution and discussion by Charlie (20210624 11:43:36) 
Under Three random squares (in Just Math) Posted on 20210623 (3 Comments) 
 solution by Charlie (20210623 11:51:11) 
Under Digit equivalence (in Just Math) Posted on 20210622 (5 Comments) 
 re(2): solution by Charlie (20210622 17:58:52) 
 solution by Charlie (20210622 10:42:59) 
Under Mixed square (in Numbers) Posted on 20210618 (5 Comments) 
 re: partial answer by Charlie (20210618 13:25:53) 
Under The power of 37 (in Numbers) Posted on 20210617 (3 Comments) 
 foolish extrapolation by Charlie (20210617 10:11:19) 
Under Prime count (in Numbers) Posted on 20210616 (3 Comments) 
 ways by Charlie (20210616 08:50:43) 
 ways by Charlie (20210616 08:50:43) 
Under There Can Be Only Twelve (in Word Problems) Posted on 20210610 (4 Comments) 
 A failed theory by Charlie (20210611 07:40:11) 
Under Double negative (in Numbers) Posted on 20210609 (3 Comments) 
 c and d by Charlie (20210609 14:13:54) 
 main problem and a by Charlie (20210609 14:09:55) 
Under Nine Pointed Sphere (in Shapes) Posted on 20210603 (12 Comments) 
 re: Using plane trig in 3 dimensions  discrepancy resolved by Charlie (20210606 12:58:23) 
 Using plane trig in 3 dimensions by Charlie (20210605 18:07:02) 
 re(3): Solution  Using spherical trig by Charlie (20210604 13:48:32) 
 re(3): Solution  Using spherical trig by Charlie (20210604 13:45:17) 
 re: Solution  Using spherical trig by Charlie (20210604 06:49:40) 
 re: Picture  aah and aha by Charlie (20210603 21:19:34) 
Under Let's play Bocce (in Probability) Posted on 20210602 (6 Comments) 
 solution by Charlie (20210602 10:32:07) 
Under Rubik's Swap (in General) Posted on 20210601 (9 Comments) 
 solution  I think by Charlie (20210601 12:25:59) 
Under Linked List Deleted (in Algorithms) Posted on 20210531 (1 Comments) 
 solution by Charlie (20210531 09:20:21) 
Under Gambler’s dilemma (in Probability) Posted on 20210528 (8 Comments) 
 computer solution by Charlie (20210528 11:12:11) 
Under Four word classes (in Word Problems) Posted on 20210527 (5 Comments) 
 re: from a common word list by Charlie (20210529 08:30:43) 
 from my word list by Charlie (20210527 10:08:34) 
Under Card Deck: Complete a set, before... (in Probability) Posted on 20210525 (3 Comments) 
 re: Solution to extra challenge #2 by Charlie (20210526 15:24:47) 
Under Eleven as mandatory divider (in Sequences) Posted on 20210524 (5 Comments) 
 re: Part a. (but no proof) by Charlie (20210524 12:11:44) 
Under The Loopy Lunatic (in Science) Posted on 20210520 (8 Comments) 
 what I got by Charlie (20210520 11:22:45) 
Under Square creates square (in Numbers) Posted on 20210518 (9 Comments) 
 computer solution by Charlie (20210518 09:05:59) 
Under Hexagon area (in Just Math) Posted on 20210517 (2 Comments) 
 solution by Charlie (20210517 12:18:07) 
Under A Country, a City and a pamphlet (in Numbers) Posted on 20210511 (4 Comments) 
 MATLAB software by Charlie (20210511 23:21:24) 
Under Fibonacci Inequality (in Just Math) Posted on 20210506 (4 Comments) 
 solution by Charlie (20210506 12:42:59) 
Under Plus operator insertion (in Numbers) Posted on 20210503 (2 Comments) 
 solution by Charlie (20210503 08:52:43) 
Under Locus amid two intersecting circles (in Geometry) Posted on 20210430 (5 Comments) 
 Playing with Geometer's Sketchpad by Charlie (20210430 08:50:29) 
Under Reverse and add in binary (in Numbers) Posted on 20210429 (8 Comments) 
 re: Smallest? by Charlie (20210503 09:00:07) 
 there seems to be a pattern here by Charlie (20210429 07:45:10) 
Under Minimize parallelogram diagonal (in Geometry) Posted on 20210428 (4 Comments) 
 solution, intuitively by Charlie (20210428 08:58:52) 
Under Chemical Sequence (in Science) Posted on 20210426 (5 Comments) 
 solution by Charlie (20210426 10:21:06) 
Under Erased to a multiple of 7 (in Numbers) Posted on 20210421 (5 Comments) 
 computer solution by Charlie (20210421 10:39:46) 
Under quadratic ^ quadratic (in General) Posted on 20210406 (5 Comments) 
 proposed solution by Charlie (20210406 10:59:00) 
Under Knight tour in an infinite board (in Just Math) Posted on 20210401 (2 Comments) 
 computer exploration and solution by Charlie (20210401 12:32:23) 
Under Don't walk! (in General) Posted on 20210324 (16 Comments) 
 just a comment by Charlie (20210324 09:59:42) 
Under With or without (in Numbers) Posted on 20210322 (5 Comments) 
 to be more exact by Charlie (20210322 10:22:51) 
Under Induced divisibility (in Just Math) Posted on 20210318 (7 Comments) 
 a pattern by Charlie (20210318 12:41:55) 
 re: Solution (i think) by Charlie (20210318 11:30:59) 
Under The fibbons (in Numbers) Posted on 20210316 (8 Comments) 
 computer solution by Charlie (20210316 10:58:20) 
Under A thin triangle (in Shapes) Posted on 20210311 (3 Comments) 
 computer solution by Charlie (20210311 10:00:29) 
Under Beat The Book (in Probability) Posted on 20210310 (10 Comments) 
 re: Almost Guaranteed profit? by Charlie (20210310 18:33:30) 
 computer calculations by Charlie (20210310 12:39:51) 
Under Numeric card game (in Just Math) Posted on 20210304 (6 Comments) 
 solution by Charlie (20210304 17:21:15) 
Under Reciprocal Equation #6 (in Just Math) Posted on 20210228 (3 Comments) 
 re: computer solution by Charlie (20210228 10:07:32) 
 computer solution by Charlie (20210228 09:41:41) 
Under The class of ‘55’ (in Numbers) Posted on 20210227 (4 Comments) 
 computer solution by Charlie (20210227 15:55:35) 
Under Circular Reasoning (in Probability) Posted on 20210223 (4 Comments) 
 re: A quibble by Charlie (20210223 21:10:29) 
 solution by Charlie (20210223 09:45:48) 
Under Differences of the fraction (in Just Math) Posted on 20210220 (6 Comments) 
 The current hypothesis by Charlie (20210221 18:13:22) 
 re: A boy named Alice by Charlie (20210221 14:07:43) 
 re: Just some guesses by Charlie (20210221 14:06:13) 
 re: Just some guesses (showing the crunched numbers) by Charlie (20210220 18:20:27) 
Under Trapezium in polygon (in Numbers) Posted on 20210218 (3 Comments) 
 computer exploration and solution (spoiler) by Charlie (20210218 10:54:02) 
Under Integer sides of cuboid (in Numbers) Posted on 20210217 (7 Comments) 
 computer solution by Charlie (20210217 10:05:26) 
Under A Rebus (in Word Problems) Posted on 20210215 (2 Comments) 
 Hint by Charlie (20210218 18:59:18) 
Under Less than 100 (in Numbers) Posted on 20210214 (3 Comments) 
 computer solution by Charlie (20210214 08:59:24) 
Under Squares concatenated to square (in Numbers) Posted on 20210213 (3 Comments) 
 computer solutions by Charlie (20210213 14:05:42) 
Under Solve in naturals (in Numbers) Posted on 20210212 (3 Comments) 
 limited search by Charlie (20210212 10:28:19) 
Under As close as possible (in Numbers) Posted on 20210211 (3 Comments) 
 solutions by Charlie (20210211 08:29:18) 
Under As time goes by (in Sequences) Posted on 20210209 (7 Comments) 
 re(2): Error/. Please correct before solving! by Charlie (20210210 13:05:02) 
Under Mission 55 (in Numbers) Posted on 20210208 (6 Comments) 
 even pos even pos sorted by positions by Charlie (20210208 11:59:26) 
 re: Harder solutions, full answer by Charlie (20210208 11:48:47) 
 computer solution for the full list by Charlie (20210208 10:17:20) 
Under Powered to perfect (in Numbers) Posted on 20210207 (7 Comments) 
 making it more probable by Charlie (20210207 12:02:23) 
Under Isosceles split (in Geometry) Posted on 20210201 (1 Comments) 
 solution by Charlie (20210201 13:01:34) 
Under Entries of a matrix (in Just Math) Posted on 20210129 (5 Comments) 
 Truly computer solution (spoiler) by Charlie (20210129 18:04:44) 
 re: Trivial solution for n=2 by Charlie (20210129 18:02:24) 
Under Three circles on sphere (in Just Math) Posted on 20210127 (2 Comments) 
 an observation by Charlie (20210128 06:55:14) 
Under Never consecutive (in Probability) Posted on 20210126 (7 Comments) 
 reduced fractions by Charlie (20210128 16:18:58) 
 Neatening the table by Charlie (20210127 11:06:16) 
 numerators and denominators separately by Charlie (20210126 13:16:09) 
 by algorithm by Charlie (20210126 11:54:00) 
 simulations for comparison by Charlie (20210126 10:19:46) 
Under 33rd Powers (in Numbers) Posted on 20210125 (5 Comments) 
 simpler solution (Dzero) by Charlie (20210125 10:22:03) 
Under Sort them out (in Word Problems) Posted on 20210123 (4 Comments) 
 Coincidence or not? by Charlie (20210123 08:22:26) 
Under Sweet little sixteen (in Just Math) Posted on 20210118 (2 Comments) 
 No proof but... by Charlie (20210118 10:24:57) 
Under 3 to 6 letters (in Word Problems) Posted on 20210116 (9 Comments) 
 re: 6letter words via program; smaller from head by Charlie (20210117 13:40:24) 
 re: 6letter words via program; smaller from head by Charlie (20210117 13:09:02) 
 6letter words via program; smaller from head by Charlie (20210117 12:08:48) 
Under Solitaire: Probability Of No First Move (in Probability) Posted on 20210112 (5 Comments) 
 simulations by Charlie (20210112 10:51:48) 
Under Go one, two, three (in Numbers) Posted on 20210109 (6 Comments) 
 re: computer exploration (spoilers)  just noticed by Charlie (20210109 13:07:47) 
 computer exploration (spoilers) by Charlie (20210109 11:20:47) 
Under 1 2 4 8 (in General) Posted on 20210108 (3 Comments) 
 computeraided solution by Charlie (20210108 10:41:37) 
Under Go do modulus (in Numbers) Posted on 20210102 (8 Comments) 
 computer exploration by Charlie (20210102 15:33:11) 
Under Not The Weakest Link (in Probability) Posted on 20201228 (8 Comments) 
 The "official" solution is available for comment by Charlie (20201231 07:36:41) 
Under Five numbers and Six sums (in Numbers) Posted on 20201220 (5 Comments) 
 re: Another possibility by Charlie (20201223 10:55:41) 
 MATLAB solution by Charlie (20201220 11:22:22) 
Under Conditional pairs (in Just Math) Posted on 20201219 (7 Comments) 
 program to find a solution by Charlie (20201219 13:12:05) 
Under Box and cube rooted (in Numbers) Posted on 20201214 (7 Comments) 
 re: Solution by Charlie (20201214 13:39:20) 
 re: Solution  my found value by Charlie (20201214 12:04:51) 
Under 3 and 3 and... (in Numbers) Posted on 20201213 (3 Comments) 
 computer solution  hope there are no bugs by Charlie (20201213 13:42:11) 
Under Sin sum (in Just Math) Posted on 20201211 (14 Comments) 
 Max and Min biased, but constant difference between by Charlie (20201211 10:40:21) 
Under Complete number (in Numbers) Posted on 20201209 (3 Comments) 
 computer solution by Charlie (20201209 12:35:15) 
Under Equation in integers (in Numbers) Posted on 20201206 (5 Comments) 
 computer exploration by Charlie (20201206 15:37:26) 
Under Shortest way to a million (in Numbers) Posted on 20201203 (15 Comments) 
 re: A start by Charlie (20201203 10:38:07) 
Under Missing side of hexagon (in Geometry) Posted on 20201202 (2 Comments) 
 solution by Charlie (20201202 14:33:00) 
Under Concatenation equals Sum of Squares (in Numbers) Posted on 20201201 (5 Comments) 
 re(3): soln by Charlie (20201201 14:52:17) 
 re: soln by Charlie (20201201 12:48:00) 
Under Permuted sums (in Just Math) Posted on 20201130 (7 Comments) 
 solving for the original numbers with MATLAB by Charlie (20201130 10:28:10) 
Under Weird shuffling (in Just Math) Posted on 20201129 (8 Comments) 
 re(4): computer verification  simulation by Charlie (20201130 20:08:28) 
 re(3): computer verification  simulation by Charlie (20201129 20:57:32) 
 re(2): computer verification  simulation by Charlie (20201129 20:50:02) 
 re: computer verification  bug  changed result by Charlie (20201129 18:43:18) 
 computer verification by Charlie (20201129 15:40:07) 
Under 2 absent digits (in Numbers) Posted on 20201128 (6 Comments) 
 computer solution with an extension by Charlie (20201128 12:30:37) 
Under Maximal of a function (in Calculus) Posted on 20201125 (2 Comments) 
 also minima by Charlie (20201125 15:09:57) 
 No proof, but approx max found by Charlie (20201125 14:24:53) 
Under Rubik's cut (in Just Math) Posted on 20201124 (2 Comments) 
 solution by Charlie (20201124 13:00:13) 
Under Calculator at rescue? (in Just Math) Posted on 20201123 (5 Comments) 
 What does it mean? by Charlie (20201123 10:38:24) 
Under Why Fight II (in Numbers) Posted on 20201118 (1 Comments) 
 computer alphametic solution; manual matching of the phrases by Charlie (20201118 14:53:32) 
Under Go left of the number (in Numbers) Posted on 20201115 (5 Comments) 
 an idea (with spoilersolution) by Charlie (20201115 11:49:18) 
Under Dive deep after the decimal point (in Numbers) Posted on 20201113 (2 Comments) 
 unsatisfying computer solution by Charlie (20201114 20:40:24) 
Under Fit the middle digit (in Numbers) Posted on 20201112 (4 Comments) 
 computer solution by Charlie (20201112 16:11:33) 
Under Clock a doodle do (in Just Math) Posted on 20201109 (4 Comments) 
 re: solution  the times by Charlie (20201109 12:18:44) 
 solution by Charlie (20201109 09:55:43) 
Under Sequence number compressed (in Just Math) Posted on 20201028 (7 Comments) 
 re(2): computer solution by Charlie (20201028 19:11:07) 
 computer solution by Charlie (20201028 10:52:22) 
Under Money giveaway (in Numbers) Posted on 20201026 (5 Comments) 
 re: A possible generalization by Charlie (20201029 10:30:24) 
 The values by Charlie (20201026 15:25:56) 
Under Quick divisibility (in Numbers) Posted on 20201020 (8 Comments) 
 the computer method by Charlie (20201020 09:33:54) 
Under Concatenation of Prime Factors is Pandigital (in Numbers) Posted on 20201015 (2 Comments) 
 computer solution  spoiler by Charlie (20201015 10:39:46) 
Under Find the pairs (in Numbers) Posted on 20201013 (23 Comments) 
 computer exploration by Charlie (20201013 10:22:11) 
Under The angle bisectors (in Geometry) Posted on 20201010 (1 Comments) 
 computer solution by Charlie (20201010 15:29:57) 
Under Pages and Squires 2 (in Liars and Knights) Posted on 20201008 (2 Comments) 
 solution without proof of uniqueness by Charlie (20201008 13:47:48) 
Under Goldin pyramid (in Shapes) Posted on 20201006 (7 Comments) 
 re(2): computer solution by Charlie (20201007 15:50:23) 
 re: computer solution by Charlie (20201007 09:06:12) 
 computer solution by Charlie (20201007 06:59:46) 
Under All odd digit (in Numbers) Posted on 20201005 (7 Comments) 
 solution by Charlie (20201005 10:49:40) 
Under Triplets cubed (in Numbers) Posted on 20201004 (3 Comments) 
 part b by Charlie (20201004 12:02:58) 
 part a by Charlie (20201004 11:57:36) 
Under Look b4 U leap (in Logic) Posted on 20201002 (8 Comments) 
 just to make it the intended target by Charlie (20201002 13:48:47) 
Under Prime equation 2 (in Numbers) Posted on 20201001 (4 Comments) 
 computer findings by Charlie (20201001 09:45:39) 
Under What follows? (in Sequences) Posted on 20200926 (2 Comments) 
 I don't know if this helps, but... by Charlie (20200926 08:01:53) 
Under Extreme inequality (in Just Math) Posted on 20200923 (4 Comments) 
 continuation: computer explorationprobably complete solution by Charlie (20200923 09:40:49) 
 computer explorationprobably complete solution by Charlie (20200923 09:38:48) 
Under Must be prime (in Sequences) Posted on 20200922 (1 Comments) 
 one possible take on it by Charlie (20200922 10:58:39) 
Under An Iterated Floor Equation (in Numbers) Posted on 20200915 (9 Comments) 
 the graph and table method by Charlie (20200915 13:54:23) 
Under 50  or more (in Numbers) Posted on 20200910 (14 Comments) 
 re(3): Record by Charlie (20200917 07:11:11) 
 re(3): some hints & remarks @ Ch by Charlie (20200911 07:38:31) 
 re: Record by Charlie (20200910 20:58:48) 
 another, higher by Charlie (20200910 15:17:37) 
 computer finding by Charlie (20200910 14:25:40) 
Under 2 related tasks (in Numbers) Posted on 20200907 (5 Comments) 
 Another solution for first by Charlie (20200908 06:35:47) 
Under Cities, Countries and Colors (in Word Problems) Posted on 20200906 (2 Comments) 
 some computer assistance by Charlie (20200906 11:29:06) 
Under WG’s unique number (in Numbers) Posted on 20200904 (8 Comments) 
 re: alternatively.... by Charlie (20200904 21:47:07) 
 computer method solution by Charlie (20200904 11:57:15) 
Under A peculiar function! (in Just Math) Posted on 20200903 (5 Comments) 
 re: computer solution and a fitted polynomial by Charlie (20200903 18:49:18) 
 computer solution and a fitted polynomial by Charlie (20200903 12:11:10) 
Under Permuted average (in Numbers) Posted on 20200901 (4 Comments) 
 computer solution and discussion by Charlie (20200901 11:00:36) 
Under Now, before and later (in Numbers) Posted on 20200826 (2 Comments) 
 Is this a solution? by Charlie (20200826 15:49:59) 
Under Square Reciprocal Summation (in Just Math) Posted on 20200825 (5 Comments) 
 re: Here is another... No computer used this time. by Charlie (20200826 07:13:04) 
 UBASIC solution by Charlie (20200825 11:22:20) 
Under Check this sequence (in Sequences) Posted on 20200824 (3 Comments) 
 parts 1 & 2  computer solution by Charlie (20200824 20:07:33) 
Under Average Of Digits of powers (in Numbers) Posted on 20200820 (7 Comments) 
 re(3): Misunderstanding of Part 3 by Charlie (20200823 18:40:22) 
 computer solution by Charlie (20200820 21:38:52) 
Under Ask and solve cubes (in Numbers) Posted on 20200817 (5 Comments) 
 re(2): computer solution by Charlie (20200825 11:31:12) 
 computer solution by Charlie (20200817 14:43:53) 
Under Numbered Balls in Test Tubes 2 (in Logic) Posted on 20200810 (5 Comments) 
 re: One way  may not be optimal? by Charlie (20200811 07:10:50) 
Under Cosine cups (in Shapes) Posted on 20200807 (7 Comments) 
 re: Solution by Charlie (20200810 07:31:54) 
 re: Solution by Charlie (20200809 21:52:30) 
 re: If... by Charlie (20200808 07:35:07) 
 If... by Charlie (20200807 12:09:02) 
Under Three Digit Number 3 (in Numbers) Posted on 20200805 (5 Comments) 
 choices, with solution by Charlie (20200805 12:32:40) 
Under Erase a prime (in Numbers) Posted on 20200803 (5 Comments) 
 computer solution by Charlie (20200803 13:45:23) 
Under Yoshigahara's Masterpiece (in Logic) Posted on 20200731 (3 Comments) 
 re(2): Ez by Charlie (20200902 06:57:33) 
Under Gamow's Elevator (in Probability) Posted on 20200726 (10 Comments) 
 re(3): what I have so far...  Hint by Charlie (20200728 07:03:03) 
 re: what I have so far...  Hint by Charlie (20200727 21:51:43) 
 clarifications by Charlie (20200727 07:03:52) 
Under 7 matches (in Word Problems) Posted on 20200715 (3 Comments) 
 computer solution by Charlie (20200715 22:52:22) 
Under A prime and a cube (in Numbers) Posted on 20200713 (11 Comments) 
 re(2): Just an observation (on an interesting program line) by Charlie (20200714 07:35:28) 
 re(2): Just an observation by Charlie (20200713 17:32:39) 
 re: Just an observation by Charlie (20200713 15:44:09) 
 Just an observation by Charlie (20200713 15:23:45) 
Under 7 hypotenuses (in Numbers) Posted on 20200710 (4 Comments) 
 re: Research by Charlie (20200713 07:48:35) 
 computer solution by Charlie (20200710 10:24:33) 
Under Four generations (in Numbers) Posted on 20200706 (9 Comments) 
 apologies to steven by Charlie (20200706 10:34:16) 
 re: part 1 via computer by Charlie (20200706 10:22:55) 
 computer solution by Charlie (20200706 10:15:25) 
Under Average other (in Numbers) Posted on 20200701 (6 Comments) 
 computer solution by Charlie (20200701 18:55:33) 
Under A coded text (in General) Posted on 20200626 (5 Comments) 
 VB program and solution by Charlie (20200626 14:34:05) 
Under Best quotient (in Word Problems) Posted on 20200624 (4 Comments) 
 No Subject by Charlie (20200624 21:03:13) 
Under Fibo's common divider (in Sequences) Posted on 20200610 (4 Comments) 
 re: computer solution by Charlie (20200611 05:49:13) 
 computer solution by Charlie (20200610 19:18:12) 
Under Can you do it? (in Games) Posted on 20200608 (4 Comments) 
 solution by Charlie (20200608 21:40:37) 
Under Almost a half (in Just Math) Posted on 20200515 (6 Comments) 
 re(2): solution (to tedious to do manually) by Charlie (20200515 10:59:52) 
 solution (to tedious to do manually) by Charlie (20200515 09:46:18) 
 re: Possible solution by Charlie (20200515 09:42:06) 
Under Luck beats theory (in Probability) Posted on 20200504 (3 Comments) 
 a. and b. by Charlie (20200504 22:54:55) 
Under WG's portfolio (in Just Math) Posted on 20200427 (4 Comments) 
 agree with xdog's solution by Charlie (20200427 18:56:14) 
Under Two Digit Average 2 (in Numbers) Posted on 20200415 (2 Comments) 
 of course by Charlie (20200416 07:58:35) 
Under Select the right subset (in Word Problems) Posted on 20200410 (3 Comments) 
 re: max found by computer by Charlie (20200410 11:45:01) 
 re: max found by computer by Charlie (20200410 11:34:42) 
 max found by computer by Charlie (20200410 11:28:58) 
Under Digits of numbers (in Numbers) Posted on 20200330 (4 Comments) 
 solution by Charlie (20200330 21:12:59) 
Under p(Ascending Number) closest to .01 (in Probability) Posted on 20200316 (3 Comments) 
 the full set by Charlie (20200316 15:08:07) 
Under What time is it now? (in General) Posted on 20200309 (7 Comments) 
 re: Solution by Charlie (20200309 18:53:00) 
Under The Celebrated Jumping Frog of Perplexus County (in Probability) Posted on 20200304 (2 Comments) 
 analysis and simulation by Charlie (20200304 12:34:07) 
Under Thrifty dates (in Numbers) Posted on 20200222 (3 Comments) 
 computer solution posted a bit later than 20:20 GMT by Charlie (20200222 14:13:08) 
Under Coded Crossword 3 (in Cryptography) Posted on 20200221 (4 Comments) 
 manual solution with computer assistance for making substitutions by Charlie (20200222 14:49:53) 
Under pot draw permutations (in Numbers) Posted on 20200212 (2 Comments) 
 outline of a solution methodology by Charlie (20200212 19:01:48) 
Under Certain old trade (in General) Posted on 20200122 (5 Comments) 
 needs someone who knows Italian by Charlie (20200122 10:22:58) 
Under 13 L2L (in Word Problems) Posted on 20191225 (8 Comments) 
 some thoughts by Charlie (20191225 21:21:57) 
Under Three Squares make a Triangle (in Shapes) Posted on 20191223 (3 Comments) 
 partial approximate solution via GSP by Charlie (20191223 13:32:32) 
Under Poetry, not poverty (in Just Math) Posted on 20191218 (3 Comments) 
 computer solution (spoiler) by Charlie (20191218 12:34:41) 
Under Gold in the Exponent (in Numbers) Posted on 20191211 (6 Comments) 
 computer solution by Charlie (20191211 12:47:13) 
Under Nobody's Perfect (in Just Math) Posted on 20191204 (13 Comments) 
 guesstimate by Charlie (20191204 15:30:49) 
Under Can we use Pigeonhole? (in Numbers) Posted on 20191126 (3 Comments) 
 My apologies for the previous title by Charlie (20191126 11:33:27) 
 my solution  without pigeonhole  including lowest such number by Charlie (20191126 11:29:13) 
Under Spherplex (in Just Math) Posted on 20191125 (4 Comments) 
 solution by Charlie (20191125 10:37:42) 
Under SOD cubed equals Sum of Squares of SODs (in Numbers) Posted on 20191120 (4 Comments) 
 computeraided solution by Charlie (20191120 14:15:56) 
Under The Big Division (in Numbers) Posted on 20191118 (5 Comments) 
 solution the other way around by Charlie (20191118 12:31:20) 
Under Factor distribution in a school (in Numbers) Posted on 20191113 (15 Comments) 
 re: maybe a soln..... by Charlie (20191113 15:04:33) 
Under Roll a unit (in Probability) Posted on 20191106 (3 Comments) 
 Inthehead solution (spoiler) by Charlie (20191106 10:31:12) 
Under Two methods (in Word Problems) Posted on 20191030 (3 Comments) 
 computeraided solution by Charlie (20191030 15:43:12) 
Under Cube rooted till 2019 (in Just Math) Posted on 20191023 (4 Comments) 
 computer summationspoiler by Charlie (20191023 13:17:47) 
Under Ardent tennis player (in Just Math) Posted on 20191022 (2 Comments) 
 solution by Charlie (20191022 13:58:12) 
Under Interval Guessing (in General) Posted on 20191021 (10 Comments) 
 correction to previous post by Charlie (20191025 18:33:40) 
 re(2): Full solution: 15 and beyond by Charlie (20191025 11:53:07) 
 re(3): some thoughts  cases of small n by Charlie (20191023 21:36:27) 
 re: some thoughts  cases of small n by Charlie (20191023 13:37:56) 
 solution by Charlie (20191021 21:16:51) 
Under Some Sum of Some Sum (in Numbers) Posted on 20191018 (3 Comments) 
 computer solution by Charlie (20191018 13:34:48) 
Under It's not a Magic Square (in Numbers) Posted on 20191017 (2 Comments) 
 computer solution by Charlie (20191017 13:53:36) 
Under Tricky sums indeed! (in Numbers) Posted on 20191010 (3 Comments) 
 computeraided solution by Charlie (20191010 12:08:48) 
Under One in all (in Word Problems) Posted on 20191009 (6 Comments) 
 some answers by Charlie (20191009 13:45:25) 
Under The middle number (in Probability) Posted on 20191008 (5 Comments) 
 solution by Charlie (20191008 14:38:50) 
 re: proposed solution by Charlie (20191008 13:35:47) 
Under An important virtue (in Word Problems) Posted on 20191007 (2 Comments) 
 spoiler by Charlie (20191007 14:32:55) 
Under 8 eights, 8 ones (in Just Math) Posted on 20191001 (4 Comments) 
 computer solution by Charlie (20191001 15:44:37) 
Under Hexagonal interior point (in Geometry) Posted on 20190924 (6 Comments) 
 solution by Charlie (20190924 14:57:14) 
Under Hexagonal Spider Web (in Probability) Posted on 20190912 (7 Comments) 
 re: my solution by Charlie (20190912 19:34:38) 
 re: my solution by Charlie (20190912 19:03:28) 
 my solution by Charlie (20190912 18:49:10) 
Under A matter of perspective (in Shapes) Posted on 20190911 (1 Comments) 
 solution by Charlie (20190911 09:57:14) 
Under One way out (in Just Math) Posted on 20190909 (2 Comments) 
 solution by Charlie (20190909 09:29:05) 
Under Reduced to single digit (in Numbers) Posted on 20190906 (14 Comments) 
 re(4): Possible solution by Charlie (20190913 20:46:43) 
 re: Thoughts by Charlie (20190910 12:47:44) 
Under 14 * A to T (in Word Problems) Posted on 20190904 (3 Comments) 
 all but one by Charlie (20190904 09:41:07) 
Under Beautiful recursion (in Just Math) Posted on 20190903 (2 Comments) 
 computer observation and solution by Charlie (20190903 11:14:16) 
Under Bored student (in Just Math) Posted on 20190830 (6 Comments) 
 partial solution by Charlie (20190830 13:02:05) 
Under Money in the word (in Word Problems) Posted on 20190829 (2 Comments) 
 computer solution by Charlie (20190829 14:24:13) 
Under Summing the product of digits (in Numbers) Posted on 20190823 (5 Comments) 
 revised solution by Charlie (20190823 12:18:08) 
 re: solution  I forgot about something by Charlie (20190823 11:11:35) 
 solution by Charlie (20190823 10:54:18) 
Under Rotated Checkerboard (in Just Math) Posted on 20190822 (3 Comments) 
 No Subject by Charlie (20190822 11:24:22) 
Under A Triangle in a Square (in Geometry) Posted on 20190821 (7 Comments) 
 Wolfram Alpha exact solution via 5 equations by Charlie (20190821 12:25:00) 
 Geometer's Sketchpad approximation by Charlie (20190821 10:18:54) 
Under Yahtzee (in Probability) Posted on 20190820 (2 Comments) 
 computeraided solution by Charlie (20190820 12:22:45) 
Under Irrational Distance/Rational Areas (in Just Math) Posted on 20190819 (4 Comments) 
 solution by Charlie (20190819 12:44:02) 
Under Recursive reaches one million (in Numbers) Posted on 20190815 (5 Comments) 
 re: computer solution with pattern the rest of the output by Charlie (20190815 13:27:31) 
 computer solution with pattern by Charlie (20190815 09:18:37) 
Under Digitally Average Integers (in Numbers) Posted on 20190814 (2 Comments) 
 computer solution by Charlie (20190814 09:41:12) 
Under Peoples Day (in Just Math) Posted on 20190812 (3 Comments) 
 computeraided solution by Charlie (20190812 22:46:02) 
Under Getting 8 (in Numbers) Posted on 20190811 (42 Comments) 
 computer solution by Charlie (20190811 12:28:47) 
Under Squared average equals square (in Numbers) Posted on 20190809 (3 Comments) 
 computer solution by Charlie (20190809 12:59:34) 
Under Unique letters (in Word Problems) Posted on 20190808 (1 Comments) 
 computer solution (spoiler) by Charlie (20190808 10:31:11) 
Under A Mysterious Multiplication (in Numbers) Posted on 20190807 (4 Comments) 
 re: No Subject by Charlie (20190809 13:07:43) 
 computer solution by Charlie (20190807 09:43:28) 
Under One or more? (in Word Problems) Posted on 20190806 (2 Comments) 
 computer solution by Charlie (20190806 11:54:37) 
Under points or pigeons in square? (in Just Math) Posted on 20190805 (8 Comments) 
 re(2): what? by Charlie (20190805 21:27:17) 
 what? by Charlie (20190805 18:31:13) 
Under Digital computing (in Numbers) Posted on 20190803 (25 Comments) 
 computer solutionI think what's wanted by Charlie (20190803 13:01:15) 
Under 444...444 (in Numbers) Posted on 20190802 (6 Comments) 
 re: solution by Charlie (20190802 13:37:55) 
 computer solution by Charlie (20190802 13:36:38) 
Under Gifts exchanged (in Logic) Posted on 20190729 (3 Comments) 
 solution by Charlie (20190729 10:50:08) 
Under Rods as triangle sides (in Just Math) Posted on 20190728 (1 Comments) 
 No Subject by Charlie (20190728 14:41:04) 
Under Pairs of primes (in Probability) Posted on 20190727 (10 Comments) 
 An extension by Charlie (20190731 10:50:14) 
 re: via computer  the start of the soln by Charlie (20190728 07:58:12) 
 re(2): computer solution through n=6 list continued by Charlie (20190727 22:01:14) 
 re: computer solution through n=6 list continued by Charlie (20190727 22:00:18) 
 computer solution through n=6 by Charlie (20190727 21:57:42) 
Under 15 A2A (in Word Problems) Posted on 20190726 (4 Comments) 
 a start by Charlie (20190726 07:40:00) 
Under Bugs on a pentagon (in Just Math) Posted on 20190724 (2 Comments) 
 proposed solution by Charlie (20190724 12:28:08) 
Under Conversion Diversion (in Just Math) Posted on 20190723 (2 Comments) 
 solution by Charlie (20190723 13:06:16) 
Under How do I know the time? (in Just Math) Posted on 20190720 (1 Comments) 
 algebraic analysis and computer solution by Charlie (20190720 12:38:54) 
Under Keep an eye Onto the other (in Just Math) Posted on 20190719 (4 Comments) 
 re: solution by Charlie (20190719 10:19:47) 
Under Approximate value (in Numbers) Posted on 20190717 (3 Comments) 
 answers by Charlie (20190717 15:46:34) 
Under Quick integral (in Calculus) Posted on 20190716 (3 Comments) 
 solution by Charlie (20190716 10:14:01) 
Under Describe the decimal (in Numbers) Posted on 20190712 (4 Comments) 
 computeraided solution by Charlie (20190712 12:09:54) 
Under Trying to get better (in Just Math) Posted on 20190711 (4 Comments) 
 re(2): hmmmm... Try again  there are numerous solutions... by Charlie (20190711 17:21:46) 
 hmmmm... by Charlie (20190711 13:41:46) 
Under 249yes, 5no (in Numbers) Posted on 20190708 (2 Comments) 
 solution by Charlie (20190708 14:39:41) 
Under Hexagonally closer (in Just Math) Posted on 20190707 (5 Comments) 
 A start by Charlie (20190707 09:57:04) 
Under Square and Rectangle (in Geometry) Posted on 20190704 (3 Comments) 
 GSP solution by Charlie (20190704 14:37:07) 
Under A special triplet (in Numbers) Posted on 20190702 (3 Comments) 
 solution by Charlie (20190703 03:59:31) 
Under Synonyms (in Word Problems) Posted on 20190701 (5 Comments) 
 computeraided solution by Charlie (20190701 09:25:09) 
Under Quick factors III (in Numbers) Posted on 20190627 (3 Comments) 
 solution by Charlie (20190627 15:39:24) 
Under Cryptajoke XIX (in Word Problems) Posted on 20190618 (1 Comments) 
 solution by Charlie (20190618 22:27:13) 
Under A four number puzzle (in Just Math) Posted on 20190615 (5 Comments) 
 re(2): proposed solution  higher value by Charlie (20190616 21:33:26) 
Under Just Hangin' around (in Just Math) Posted on 20190614 (10 Comments) 
 re: method .... by Charlie (20190614 22:17:12) 
 just a thought by Charlie (20190614 11:15:50) 
Under Primes and Semiprimes (in Numbers) Posted on 20190612 (2 Comments) 
 computer solution by Charlie (20190612 12:12:48) 
Under Pouring water (in Shapes) Posted on 20190606 (2 Comments) 
 solution by Charlie (20190606 15:54:26) 
Under Number dilemma (in Numbers) Posted on 20190605 (19 Comments) 
 computer solution by Charlie (20190605 12:29:13) 
Under Tangent of string of 5 (in Just Math) Posted on 20190604 (3 Comments) 
 re: Again, quite interesting by Charlie (20190605 12:23:35) 
Under Oned square root (in Numbers) Posted on 20190603 (4 Comments) 
 thoughts by Charlie (20190603 22:02:55) 
Under Sliced sphere (in Shapes) Posted on 20190529 (5 Comments) 
 re: attempted soln by Charlie (20190530 10:52:58) 
Under Who's on the 4th base? (in Numbers) Posted on 20190528 (3 Comments) 
 re: computer solution and extension continued by Charlie (20190528 15:53:51) 
 computer solution and extension by Charlie (20190528 15:51:13) 
Under Divisors' sum = square (in Numbers) Posted on 20190527 (9 Comments) 
 computer solution by Charlie (20190527 15:54:32) 
Under The Bug Climber (in Just Math) Posted on 20190522 (2 Comments) 
 re: solution by Charlie (20190523 10:38:23) 
 solution by Charlie (20190522 20:12:38) 
Under Soft car for cats (in Numbers) Posted on 20190522 (2 Comments) 
 partway, I think by Charlie (20190522 12:29:57) 
Under Squarely chained (in Numbers) Posted on 20190521 (3 Comments) 
 computer solution by Charlie (20190521 16:17:35) 
Under Carry on, Decimal (in Numbers) Posted on 20190520 (3 Comments) 
 solution by Charlie (20190520 19:24:02) 
Under Evened N and 3N (in Numbers) Posted on 20190518 (2 Comments) 
 computer solution by Charlie (20190518 14:07:48) 
Under Calculator can't handle it (in Numbers) Posted on 20190517 (3 Comments) 
 solution by Charlie (20190517 19:25:55) 
Under Marks on Marks off (in Numbers) Posted on 20190515 (3 Comments) 
 solution by Charlie (20190515 16:56:55) 
Under Concatenation sum (in Numbers) Posted on 20190515 (4 Comments) 
 computeraided solution by Charlie (20190515 11:23:30) 
Under Prime wisdom (in Logic) Posted on 20190514 (3 Comments) 
 Errare humanum est, Ady's in good company. A propos indeed. by Charlie (20190516 10:31:51) 
 a computer beginning by Charlie (20190514 14:46:42) 
Under The road less travelled (in Just Math) Posted on 20190514 (1 Comments) 
 solution by Charlie (20190514 11:42:43) 
Under Chemical deduction (in Logic) Posted on 20190513 (10 Comments) 
 solution by Charlie (20190513 12:45:21) 
Under Precision counts! (in Sequences) Posted on 20190512 (4 Comments) 
 re: 1st attempt  not complete by Charlie (20190512 09:27:24) 
Under No copying, students (in Probability) Posted on 20190510 (3 Comments) 
 computeraided solution by Charlie (20190510 14:15:08) 
Under Integer coordinates (in Numbers) Posted on 20190509 (2 Comments) 
 solution by Charlie (20190509 14:18:54) 
Under Odd partition (in Numbers) Posted on 20190509 (2 Comments) 
 computer solution by Charlie (20190509 14:13:14) 
Under A hairy problem (in Just Math) Posted on 20190508 (1 Comments) 
 computer solution with assumptions by Charlie (20190508 17:22:51) 
Under Summed LCM (in Numbers) Posted on 20190508 (3 Comments) 
 solution by Charlie (20190508 10:53:48) 
Under A geometric gangster shooting (in Just Math) Posted on 20190506 (6 Comments) 
 re(2): A guess (spoiler?) by Charlie (20190506 18:21:38) 
 re(2): A guess (spoiler?) by Charlie (20190506 17:01:42) 
Under Diagonal mystery (in Geometry) Posted on 20190504 (3 Comments) 
 computer solution by Charlie (20190504 13:53:04) 
Under Single, Double & Triple Scoops (in Just Math) Posted on 20190503 (1 Comments) 
 solution two ways by Charlie (20190503 09:06:09) 
Under Number Cards Before Face Cards (in Probability) Posted on 20190502 (6 Comments) 
 Hint by Charlie (20190506 07:51:34) 
Under The right time (in Just Math) Posted on 20190502 (1 Comments) 
 solution by Charlie (20190506 11:33:25) 
Under The powers and the exponent (in Calculus) Posted on 20190501 (1 Comments) 
 solution by Charlie (20190501 18:24:26) 
Under Missing letter (in Logic) Posted on 20190501 (6 Comments) 
 re: almost (w/spoiler) by Charlie (20190501 11:11:51) 
Under The special ones among the group (in Numbers) Posted on 20190430 (3 Comments) 
 solution by Charlie (20190430 12:29:11) 
Under Bit filling in 5*5 grid! (in Just Math) Posted on 20190426 (3 Comments) 
 computer solution by Charlie (20190426 12:39:15) 
Under Arithmetic prime (in Numbers) Posted on 20190425 (3 Comments) 
 computer solution by Charlie (20190425 14:50:25) 
Under He stole my ball! (in Probability) Posted on 20190424 (8 Comments) 
 re(2): computer assissted solution by Charlie (20190425 15:30:08) 
 re: related problem by Charlie (20190425 14:26:53) 
 computer assissted solution by Charlie (20190424 16:44:02) 
Under How many qualified numbers? (in Numbers) Posted on 20190424 (3 Comments) 
 solution by Charlie (20190424 11:57:48) 
Under A Jewish dilemma (in Word Problems) Posted on 20190419 (1 Comments) 
 solution by Charlie (20190419 12:29:03) 
Under Breaking the Jewel code (in Numbers) Posted on 20190417 (4 Comments) 
 some thoughts by Charlie (20190417 11:03:51) 
Under 2000 9s (in Numbers) Posted on 20190415 (2 Comments) 
 solution by Charlie (20190415 19:47:46) 
Under 4 and 5 powered (in Numbers) Posted on 20190412 (2 Comments) 
 computer solution by Charlie (20190412 13:24:58) 
Under The number n in n^2 (in Numbers) Posted on 20190411 (3 Comments) 
 in Basic by Charlie (20190411 15:27:08) 
Under Blobs' Borders 2 (in Shapes) Posted on 20190410 (4 Comments) 
 re(2): solution  another way (attempt) by Charlie (20190416 11:41:08) 
 re: solution by Charlie (20190416 11:35:48) 
Under Based on threes! (in Numbers) Posted on 20190409 (5 Comments) 
 solution with computation by program, with a oneparagraph analytic method by Charlie (20190409 16:03:12) 
Under Just count them ! (in Just Math) Posted on 20190409 (2 Comments) 
 computer solution by Charlie (20190409 10:55:30) 
Under Matrixed Fibonacci (in Just Math) Posted on 20190408 (2 Comments) 
 answer (computer exploration) by Charlie (20190408 16:41:42) 
Under The devilish 9 roots (in Just Math) Posted on 20190406 (1 Comments) 
 Wolfram Alpha's solution by Charlie (20190406 14:25:27) 
Under Imagine the world (in Shapes) Posted on 20190405 (2 Comments) 
 delayed aha! moment after too much algebra by Charlie (20190405 18:06:57) 
Under Hot and Cold Cubes (in Science) Posted on 20190404 (6 Comments) 
 re(2): Missing info? Or solution? Example by Charlie (20190405 11:18:22) 
Under Asymmetrical String (in Numbers) Posted on 20190404 (1 Comments) 
 solution by Charlie (20190404 10:58:06) 
Under HySpherical (in Shapes) Posted on 20190403 (1 Comments) 
 if my algebra was careful enough... by Charlie (20190403 23:18:59) 
Under Sine in Exponent (in Just Math) Posted on 20190403 (17 Comments) 
 re: 2 possible solutions by Charlie (20190403 13:52:27) 
Under Taramasalata inspired world (in Word Problems) Posted on 20190401 (21 Comments) 
 correcting my error and summing up by Charlie (20190418 20:21:48) 
 apologies by Charlie (20190418 15:40:22) 
 more mountains by Charlie (20190418 15:27:35) 
 mountains by Charlie (20190418 14:00:35) 
 countries by Charlie (20190418 11:02:37) 
 re(2): Some cities and states were missed by Charlie (20190418 10:49:14) 
 re: Some cities and states were missed by Charlie (20190417 21:19:53) 
 Some cities and states were missed by Charlie (20190417 20:50:11) 
 World cities and U.S. states  same idea  from Wikipedia pages by Charlie (20190417 20:33:34) 
 Rivers in the U.S.  computer findings by Charlie (20190417 15:03:53) 
Under Closer to your roots (in Just Math) Posted on 20190328 (1 Comments) 
 from Wolfram Alpha by Charlie (20190328 17:15:38) 
Under A Divisor Diversion (in Numbers) Posted on 20190327 (5 Comments) 
 computer explorationprobable solution by Charlie (20190327 17:22:04) 
Under Divisor in between (in Numbers) Posted on 20190326 (2 Comments) 
 solution by Charlie (20190326 13:38:09) 
Under Larger Square (in Numbers) Posted on 20190325 (2 Comments) 
 computer solution by Charlie (20190325 12:46:21) 
Under Sickquence (in Just Math) Posted on 20190320 (1 Comments) 
 computer solution by Charlie (20190320 11:13:28) 
Under Math is radical (in Numbers) Posted on 20190319 (3 Comments) 
 computer attempt is close but no cigar by Charlie (20190319 15:00:51) 
Under Factor it (in Numbers) Posted on 20190319 (4 Comments) 
 re: Solution .... hmmm by Charlie (20190319 11:37:55) 
Under Is this circular billiards? (in Geometry) Posted on 20190318 (4 Comments) 
 re(2): Geometer's Sketchpad approximation by Charlie (20190318 19:49:15) 
 Geometer's Sketchpad approximation by Charlie (20190318 17:09:09) 
Under Weird equations (in Just Math) Posted on 20190318 (2 Comments) 
 Wolfram Alpha's solution by Charlie (20190318 12:41:51) 
Under Quad composition (in Just Math) Posted on 20190316 (4 Comments) 
 re(2): calculator solution by Charlie (20190316 14:19:55) 
 re: calculator solution by Charlie (20190316 13:32:54) 
 calculator solution by Charlie (20190316 13:20:33) 
Under The Tiny Triangle (in Shapes) Posted on 20190315 (2 Comments) 
 Geometer's Sketchpad approximation by Charlie (20190315 17:30:47) 
Under Where is the center? (in Geometry) Posted on 20190315 (13 Comments) 
 How my method must have gone wrong by Charlie (20190315 13:03:51) 
Under 'Two' many roots (in Just Math) Posted on 20190314 (2 Comments) 
 solution by Charlie (20190314 15:54:56) 
Under Shifting the digit II (in Numbers) Posted on 20190313 (2 Comments) 
 computeraided solution by Charlie (20190313 13:30:43) 
Under A Golden Fraction (in Numbers) Posted on 20190312 (3 Comments) 
 UBASIC solution (spoiler) by Charlie (20190312 15:51:27) 
Under Shifting the digit (in Numbers) Posted on 20190311 (5 Comments) 
 computer solution by Charlie (20190311 17:42:32) 
Under Minimizing the Denominator (in Numbers) Posted on 20190308 (3 Comments) 
 computer solution by Charlie (20190308 16:19:45) 
Under Corruption in my file (in Probability) Posted on 20190307 (1 Comments) 
 solution by Charlie (20190307 13:08:51) 
Under What's the calculator doing? (in General) Posted on 20190306 (4 Comments) 
 solution by Charlie (20190306 15:26:51) 
Under A Great Greatest Common Divisor (in Numbers) Posted on 20190306 (2 Comments) 
 solution by Charlie (20190306 10:46:15) 
Under The Great Comparison (in Numbers) Posted on 20190302 (6 Comments) 
 the answer by Charlie (20190302 15:52:04) 
Under 2018 to 2019 (in Numbers) Posted on 20190301 (3 Comments) 
 solution by Charlie (20190301 13:33:13) 
Under And counting (in Numbers) Posted on 20190228 (4 Comments) 
 Wolfram Alpha's solution by Charlie (20190228 19:43:36) 
Under Odd one out (in Word Problems) Posted on 20190228 (2 Comments) 
 solution by Charlie (20190228 15:16:29) 
Under Shifted regions (in Just Math) Posted on 20190227 (4 Comments) 
 re: solution  math and computer by Charlie (20190228 15:33:07) 
 solution by Charlie (20190227 15:09:30) 
Under Add no DANDY  No need ! (in Word Problems) Posted on 20190225 (1 Comments) 
 words from my computer's word list (spoiler) by Charlie (20190225 14:58:33) 
Under Counting Digit (in Numbers) Posted on 20190225 (3 Comments) 
 how long does this method work? (spoiler) by Charlie (20190225 11:50:29) 
Under Palindromes' divisibility (in Numbers) Posted on 20190222 (2 Comments) 
 re: Mentally by Charlie (20190226 09:38:22) 
Under Unlikely event (in Numbers) Posted on 20190221 (3 Comments) 
 solution by Charlie (20190221 11:37:43) 
Under Twin and reversible (in Numbers) Posted on 20190220 (5 Comments) 
 solution and extension by Charlie (20190220 13:06:07) 
Under Limited reflections (in General) Posted on 20190219 (7 Comments) 
 re(2): There are easy ways by Charlie (20190221 13:43:04) 
 simulation by Charlie (20190220 12:00:19) 
 Much work for a D2 puzzle by Charlie (20190219 16:29:56) 
Under Bifonacci (in Numbers) Posted on 20190219 (2 Comments) 
 re: Solution; also an extension by Charlie (20190219 11:06:49) 
Under Chacun à son goût ! (in Just Math) Posted on 20190218 (3 Comments) 
 re(2): computer solutions, with an extension of the bonus by Charlie (20190219 11:19:31) 
 computer solutions, with an extension of the bonus by Charlie (20190218 16:43:31) 
Under Algebra? (in Just Math) Posted on 20190216 (1 Comments) 
 via Wolfram Alpha by Charlie (20190216 15:11:11) 
Under Recovering the number (in Numbers) Posted on 20190213 (2 Comments) 
 bonus by Charlie (20190213 13:43:15) 
Under The Cut Cube (in Shapes) Posted on 20190213 (4 Comments) 
 solution by Charlie (20190213 12:25:24) 
Under Can you C it? (in Word Problems) Posted on 20190206 (21 Comments) 
 if... by Charlie (20190206 12:22:21) 
Under 3 coprime unknowns (in Numbers) Posted on 20190204 (2 Comments) 
 computer solution by Charlie (20190204 11:55:20) 
Under Integers inside surds (in Numbers) Posted on 20190203 (2 Comments) 
 computer doesn't mind tedium, and discovers duplicates by Charlie (20190206 12:56:35) 
Under Neighbors differ by even numbers (in Numbers) Posted on 20190201 (2 Comments) 
 computeraided solution by Charlie (20190201 16:26:57) 
Under OMG Equation (in Just Math) Posted on 20190201 (1 Comments) 
 Wolfram Alpha's solution by Charlie (20190201 13:23:48) 
Under Only prime digits allowed (in Numbers) Posted on 20190131 (2 Comments) 
 computer solution by Charlie (20190131 15:57:31) 
Under 48th digit in the head (in Just Math) Posted on 20190130 (4 Comments) 
 certainly not in my head (but spoiler present anyway) by Charlie (20190130 15:02:06) 
Under Consistency parameter (in Just Math) Posted on 20190130 (3 Comments) 
 solution by Charlie (20190130 11:38:01) 
Under An enumeration problem (in Just Math) Posted on 20190128 (1 Comments) 
 Let me enumerate the ways  computer solution by Charlie (20190128 15:58:38) 
Under Digit Hunting (in Just Math) Posted on 20190126 (4 Comments) 
 by computer calculation by Charlie (20190126 15:09:29) 
Under Uniform distribution (in Probability) Posted on 20190125 (9 Comments) 
 re: computer solution by Charlie (20190126 16:22:06) 
 computer solution by Charlie (20190126 15:47:54) 
Under More or less 6 days (in Just Math) Posted on 20190124 (6 Comments) 
 re(2): computer solutionall ways by Charlie (20190125 12:53:28) 
 computer solutionall ways by Charlie (20190125 09:08:22) 
Under Digit Anagram (in Numbers) Posted on 20190124 (3 Comments) 
 some examplesfor what they're worth by Charlie (20190124 10:27:13) 
Under Smooth Sum Situation (in Sequences) Posted on 20190123 (3 Comments) 
 computer sum; dumb way and smarter way by Charlie (20190123 15:42:55) 
Under Worm ate the numbers (in Numbers) Posted on 20190118 (2 Comments) 
 computer solution by Charlie (20190119 13:36:45) 
Under Factorial Tremors (in Numbers) Posted on 20190116 (5 Comments) 
 re: Guess by Charlie (20190116 15:20:02) 
Under Dial W for WORD (in Word Problems) Posted on 20190115 (1 Comments) 
 No Subject by Charlie (20190115 15:55:46) 
Under Reach home (in Just Math) Posted on 20190114 (13 Comments) 
 conjecture by Charlie (20190114 16:26:06) 
Under Sine recurrence (in Just Math) Posted on 20190108 (6 Comments) 
 computer solution by Charlie (20190108 11:22:15) 
 re: @ DAK by Charlie (20190108 08:20:15) 
Under Defining a number (in Numbers) Posted on 20190105 (2 Comments) 
 computer solutions by Charlie (20190105 13:47:53) 
Under 4 or more primes (in Numbers) Posted on 20190103 (3 Comments) 
 computer solution by Charlie (20190103 12:42:41) 
Under Ring in the New  again and again and again.. (in Numbers) Posted on 20190101 (2 Comments) 
 playing with the computer in UBASIC by Charlie (20190101 14:53:34) 
Under 24 prescheduled dates (in Just Math) Posted on 20181231 (1 Comments) 
 computeraided solution by Charlie (20181231 22:42:41) 
Under Double perfection (in Numbers) Posted on 20181228 (1 Comments) 
 computer solution by Charlie (20181228 15:26:08) 
Under Restoring a multiplication sample (in Just Math) Posted on 20181227 (1 Comments) 
 computer solutions by Charlie (20181227 11:12:58) 
Under Same digits (in Numbers) Posted on 20181226 (6 Comments) 
 re(2): computer solution by Charlie (20181226 20:02:17) 
 computer solution by Charlie (20181226 10:24:13) 
Under Probably Acute (in Just Math) Posted on 20181221 (12 Comments) 
 re: simulation results by Charlie (20181225 13:18:12) 
 re: Not one answer by Charlie (20181222 08:34:36) 
 simulation results by Charlie (20181221 10:58:56) 
Under Restoring a definition (in Word Problems) Posted on 20181219 (2 Comments) 
 approximate solution  researched by Charlie (20181219 16:03:46) 
Under Concentric Circles and Equilateral Triangle (in Just Math) Posted on 20181215 (2 Comments) 
 GSP Approximation by Charlie (20181215 15:51:06) 
Under Colored triangle (in Sequences) Posted on 20181214 (10 Comments) 
 in case this helps guide the analysis by Charlie (20181214 21:26:20) 
Under All digits distinct (in Numbers) Posted on 20181212 (5 Comments) 
 re: late computer solution by Charlie (20201212 16:11:41) 
 computer solution by Charlie (20181212 15:15:17) 
Under A short list (in Numbers) Posted on 20181211 (2 Comments) 
 computer solution by Charlie (20181211 11:08:27) 
Under The 100th number (in Sequences) Posted on 20181210 (9 Comments) 
 re(3): Hint by Charlie (20190111 11:44:45) 
Under Maximal number of solutions (in Just Math) Posted on 20181208 (5 Comments) 
 Basic language solution by Charlie (20181209 10:13:45) 
Under 8 distinct partitions (in Numbers) Posted on 20181206 (6 Comments) 
 re(2): computer solution by Charlie (20181207 07:23:18) 
 computer solution by Charlie (20181206 22:40:19) 
Under Square after square creates a new square (in Numbers) Posted on 20181205 (3 Comments) 
 supplement containing nontrivializing zeros by Charlie (20181205 10:56:08) 
 computer solution by Charlie (20181205 10:28:31) 
Under Evaluate the sum (in Sequences) Posted on 20181201 (5 Comments) 
 solution based on previous comments by Charlie (20181202 14:05:51) 
Under Mean Diagonals (in Calculus) Posted on 20181123 (5 Comments) 
 one probably wrong way to go about it by Charlie (20181123 11:42:02) 
Under From sum to addends (in Just Math) Posted on 20181122 (3 Comments) 
 answer by Charlie (20181123 11:23:55) 
Under 3 equal products (in Numbers) Posted on 20181121 (10 Comments) 
 re(2): Answer to the bonus. by Charlie (20181124 09:18:48) 
 re(3): Answer to the bonus. by Charlie (20181123 11:26:49) 
 re(2): Answer to the bonus. by Charlie (20181122 18:42:00) 
 re(2): Answer to the bonus. by Charlie (20181122 15:07:47) 
 Answer to the bonus. by Charlie (20181121 13:57:27) 
 re(2): computer solution and partial investigation of the bonus  ctd. by Charlie (20181121 12:14:33) 
 re: computer solution and partial investigation of the bonus  ctd. by Charlie (20181121 12:12:29) 
 computer solution and partial investigation of the bonus by Charlie (20181121 12:10:34) 
Under New word from two others (in Word Problems) Posted on 20181118 (9 Comments) 
 computer failure to find solution by Charlie (20181118 11:45:06) 
Under Sine of Squared (in Calculus) Posted on 20181115 (6 Comments) 
 re: computer solution by Charlie (20181115 11:35:32) 
 computer solution by Charlie (20181115 11:17:41) 
Under Body parts (in Riddles) Posted on 20181106 (8 Comments) 
 what I was thinking by Charlie (20181106 13:32:34) 
Under Sum of the page numbers (in Just Math) Posted on 20181105 (3 Comments) 
 re: Not so simple (spoiler) by Charlie (20181105 10:24:28) 
Under Duelling pairs (in Games) Posted on 20181102 (16 Comments) 
 computeraided solution by Charlie (20181102 15:17:15) 
 starting up by Charlie (20181102 13:08:37) 
Under Defining a sequence (in Just Math) Posted on 20181031 (3 Comments) 
 re: one soln by Charlie (20181031 10:20:18) 
Under Onepeak sets (in Just Math) Posted on 20181030 (4 Comments) 
 re: not sure I understand by Charlie (20181030 17:47:15) 
Under Some slack (in Geometry) Posted on 20181029 (2 Comments) 
 my solution by Charlie (20181029 10:26:14) 
Under Zeta sine (in Just Math) Posted on 20181028 (6 Comments) 
 re(4): Solution (spoiler) by Charlie (20181031 15:01:49) 
 re(2): Solution (spoiler) by Charlie (20181031 14:07:46) 
 re(3): Solution (spoiler) by Charlie (20181031 12:10:31) 
 re(2): Solution (spoiler) by Charlie (20181031 11:56:13) 
 re: Solution (spoiler) by Charlie (20181031 11:26:41) 
Under The wisdom of Windsor (in Word Problems) Posted on 20181026 (2 Comments) 
 via some research by Charlie (20181027 15:59:26) 
Under Chain of Primes (in Numbers) Posted on 20181023 (5 Comments) 
 re: p&p soln by Charlie (20181024 16:21:53) 
Under Squares needing 2 digits only (in Numbers) Posted on 20181021 (3 Comments) 
 computer solution by Charlie (20181021 19:41:09) 
Under A series of primes equals N (in Numbers) Posted on 20181019 (2 Comments) 
 computer solution by Charlie (20181019 11:53:38) 
Under Parcelation (in Geometry) Posted on 20181018 (2 Comments) 
 solution by Charlie (20181018 12:43:00) 
Under Get the bases! (in Just Math) Posted on 20181017 (5 Comments) 
 re: computer soln  my program for it by Charlie (20181017 11:39:24) 
Under Box of balls (in Probability) Posted on 20181016 (6 Comments) 
 solution by Charlie (20181016 11:33:43) 
Under Introducing sphenic numbers (in Numbers) Posted on 20181014 (3 Comments) 
 solution by Charlie (20181014 17:35:31) 
Under Emirps census (in Sequences) Posted on 20181012 (2 Comments) 
 computeraided solution by Charlie (20181012 12:05:22) 
Under Reversal creates average (in Sequences) Posted on 20181010 (7 Comments) 
 re(2): computer soln by Charlie (20181011 08:26:11) 
 re: computer soln by Charlie (20181010 11:37:03) 
 re: computer soln (agree on solutionspoiler present) by Charlie (20181010 11:08:03) 
Under Calling spade a spade (in Numbers) Posted on 20181007 (1 Comments) 
 computer solution by Charlie (20181007 11:11:39) 
Under Feathers of different colors (in Numbers) Posted on 20181006 (2 Comments) 
 computerassisted solution and extension (spoiler) by Charlie (20181006 11:28:05) 
Under 2Z out (in Sequences) Posted on 20181005 (2 Comments) 
 solution by Charlie (20181005 14:52:53) 
Under At least 3 zeroes (in Sequences) Posted on 20181003 (5 Comments) 
 solution by Charlie (20181003 11:58:11) 
Under Monty Hall variant (in Probability) Posted on 20180930 (6 Comments) 
 Monty Hall by Charlie (20180930 10:04:33) 
 strategy (spoiler) by Charlie (20180930 09:34:57) 
Under Prime phone (in Numbers) Posted on 20180928 (1 Comments) 
 computer solution by Charlie (20180928 10:56:13) 
Under Any conclusions? (in Logic) Posted on 20180926 (2 Comments) 
 a conclusion by Charlie (20180926 10:48:24) 
Under True or not (in General) Posted on 20180925 (6 Comments) 
 re(2): mostly a discussion by Charlie (20180925 15:57:25) 
 mostly a discussion by Charlie (20180925 09:48:16) 
Under A logical search (in Numbers) Posted on 20180924 (10 Comments) 
 nonpreferred solution and extension by Charlie (20180924 12:58:00) 
Under Jeopardy style (in Just Math) Posted on 20180923 (2 Comments) 
 another correct response by Charlie (20180923 14:35:46) 
Under Name the sequence (in Sequences) Posted on 20180917 (5 Comments) 
 re: Sequence Name by Charlie (20180917 22:26:19) 
Under A packing exercise (in Shapes) Posted on 20180914 (5 Comments) 
 solution by Charlie (20180914 15:54:23) 
Under Compare them (in Numbers) Posted on 20180908 (7 Comments) 
 re(2): integers for (x,y) by Charlie (20180910 07:49:14) 
 re: proposed solution by Charlie (20180908 17:15:12) 
 proposed solution by Charlie (20180908 13:23:42) 
Under A Cone and a Sphere (in Just Math) Posted on 20180907 (6 Comments) 
 My corrected solution by Charlie (20180908 08:56:08) 
 re: attempted solution by Charlie (20180907 14:05:47) 
 solution by Charlie (20180907 13:57:30) 
Under Weight of nothing in an elevator (in Science) Posted on 20180906 (6 Comments) 
 re: No Subject by Charlie (20180906 15:36:17) 
 proposed solution by Charlie (20180906 10:54:35) 
Under Around the beast number (in Numbers) Posted on 20180904 (4 Comments) 
 re: soln.s by Charlie (20180904 20:11:16) 
Under Complicated Tangency (in Geometry) Posted on 20180901 (2 Comments) 
 solution by Charlie (20180901 14:37:37) 
Under A pet ant (in Shapes) Posted on 20180831 (3 Comments) 
 solution by Charlie (20180831 13:47:28) 
Under Ignoring an error (in Just Math) Posted on 20180830 (2 Comments) 
 solution by Charlie (20180830 14:31:32) 
Under Power tower (in Numbers) Posted on 20180826 (1 Comments) 
 solution by Charlie (20180826 13:39:29) 
Under A set of numbers (in Numbers) Posted on 20180825 (1 Comments) 
 solution by Charlie (20180825 15:45:55) 
Under Ant highway with energy loss (in Calculus) Posted on 20180824 (9 Comments) 
 re: possible analytical approach (thoughts) by Charlie (20180826 12:49:47) 
 re(3): heuristic computer solution by Charlie (20180826 12:44:59) 
 re(2): heuristic computer solution by Charlie (20180825 12:07:58) 
 heuristic computer solution by Charlie (20180824 18:42:13) 
Under A counting task (in Numbers) Posted on 20180823 (7 Comments) 
 re: counting by Charlie (20180823 10:39:44) 
 the numbers by Charlie (20180823 10:01:30) 
 computer solution by Charlie (20180823 10:00:05) 
Under Tax deduction (in Numbers) Posted on 20180822 (6 Comments) 
 re(2): computer solution by Charlie (20180822 13:11:22) 
 computer solution by Charlie (20180822 10:39:55) 
Under What's next? (3) (in Sequences) Posted on 20180819 (3 Comments) 
 researched solution by Charlie (20180819 14:13:48) 
Under Just a search (in Numbers) Posted on 20180818 (5 Comments) 
 computer solution by Charlie (20180818 14:36:33) 
Under Ant highway (in Shapes) Posted on 20180817 (3 Comments) 
 previous post should have been titled solution (spoiler) by Charlie (20180817 14:29:15) 
 No Subject by Charlie (20180817 14:23:48) 
Under Roll away (in Calculus) Posted on 20180815 (5 Comments) 
 re: An approximate look by graphing by Charlie (20180815 12:40:11) 
 An approximate look by graphing by Charlie (20180815 11:50:18) 
Under Tippy table (in Shapes) Posted on 20180814 (3 Comments) 
 solution by Charlie (20180814 13:56:31) 
Under 31 created by 4 successive integers (in Numbers) Posted on 20180813 (7 Comments) 
 answer (spoiler) by Charlie (20180813 14:21:42) 
Under Quintuplet of consecutive primes (in Numbers) Posted on 20180811 (3 Comments) 
 computer solution by Charlie (20180811 13:42:49) 
Under Attendance Records (in Numbers) Posted on 20180810 (4 Comments) 
 re: Solution by Charlie (20180813 14:30:16) 
Under Six or less? (in Just Math) Posted on 20180809 (6 Comments) 
 re(2): Don't get me started... (but) ... by Charlie (20180809 19:06:08) 
 Don't get me started... (but) ... by Charlie (20180809 09:41:01) 
Under Art is marching on.. (in Word Problems) Posted on 20180808 (6 Comments) 
 from my word list by Charlie (20180808 11:36:51) 
Under Shirtless ? Even nude! (in Numbers) Posted on 20180807 (3 Comments) 
 computer solution by Charlie (20180807 10:37:21) 
Under Call 911 (in Just Math) Posted on 20180803 (2 Comments) 
 computer exploration (spoilers) by Charlie (20180803 12:01:41) 
Under 1st 101digit prime (in Numbers) Posted on 20180802 (3 Comments) 
 computer solution by Charlie (20180802 12:25:55) 
Under Lost in Translation (in General) Posted on 20180731 (9 Comments) 
 first one by Charlie (20180731 10:02:27) 
Under Ten to five (in Numbers) Posted on 20180730 (7 Comments) 
 solution (spoiler) by Charlie (20180730 11:03:24) 
Under Special feature (in Numbers) Posted on 20180729 (6 Comments) 
 re(2): computer solution and tidbits from a reference by Charlie (20180730 12:21:41) 
 computer solution and tidbits from a reference by Charlie (20180729 13:06:40) 
Under Square  both ways (in Numbers) Posted on 20180728 (3 Comments) 
 re: computer solutions by Charlie (20180728 11:59:11) 
 computer solutions by Charlie (20180728 11:43:29) 
Under 8191 has a partner (in Numbers) Posted on 20180726 (3 Comments) 
 computer solution by Charlie (20180726 11:26:45) 
Under Night Lights  Light Nights (in Science) Posted on 20180724 (4 Comments) 
 my version by Charlie (20180724 10:14:27) 
Under Oddabundant numbers. (in Numbers) Posted on 20180721 (2 Comments) 
 ... and then some by Charlie (20180721 14:23:19) 
Under An Irrational Demand (in General) Posted on 20180717 (8 Comments) 
 What do you do? by Charlie (20180717 12:15:46) 
