Under Always solvable (in Numbers) Posted on 2018-09-15 (2 Comments) |

| solution by Daniel (2018-09-15 12:47:13) |

Under How to do it? (in Geometry) Posted on 2018-09-05 (11 Comments) |

| re(2): A Start- I concur by Daniel (2018-09-06 06:35:24) |

Under Ones vs twos (in Numbers) Posted on 2018-09-03 (2 Comments) |

| analytical solution by Daniel (2018-09-03 12:28:09) |

Under A pet ant (in Shapes) Posted on 2018-08-31 (3 Comments) |

| re: Some Trouble (possible solution) by Daniel (2018-09-01 04:19:17) |

| Some Trouble (possible solution) by Daniel (2018-08-31 08:46:45) |

Under Mission Impossible (in Just Math) Posted on 2018-08-28 (2 Comments) |

| Proof by Daniel (2018-08-28 08:48:47) |

Under Roll away (in Calculus) Posted on 2018-08-15 (4 Comments) |

| Exact Answer by Daniel (2018-08-15 18:55:58) |

Under Attendance Records (in Numbers) Posted on 2018-08-10 (4 Comments) |

| quick search by Daniel (2018-08-10 09:18:28) |

Under Six or less? (in Just Math) Posted on 2018-08-09 (6 Comments) |

| my solution by Daniel (2018-08-09 09:30:35) |

Under 8191 has a partner (in Numbers) Posted on 2018-07-26 (3 Comments) |

| proof of uniqueness by Daniel (2018-07-27 07:19:07) |

Under Night Lights - Light Nights (in Science) Posted on 2018-07-24 (3 Comments) |

| my attempt by Daniel (2018-07-24 07:48:04) |

Under Topical Quotation VIII (in Word Problems) Posted on 2018-07-19 (1 Comments) |

| solution by Daniel (2018-07-19 08:13:22) |

Under An Irrational Demand (in General) Posted on 2018-07-17 (8 Comments) |

| re: EZ does it by Daniel (2018-07-17 08:57:59) |

Under Summing consecutive factorials (in Just Math) Posted on 2018-06-26 (7 Comments) |

| re(5): If you don't have to start with 1 ... by Daniel (2018-06-26 20:36:47) |

| re(4): If you don't have to start with 1 ... by Daniel (2018-06-26 20:23:20) |

| re(2): If you don't have to start with 1 ... by Daniel (2018-06-26 12:00:27) |

| analytical solution by Daniel (2018-06-26 10:02:58) |

Under Sum of reciprocals (in Just Math) Posted on 2018-06-22 (2 Comments) |

| Analyical Solution by Daniel (2018-06-22 21:36:18) |

Under Non-zero integers (in Just Math) Posted on 2018-06-20 (3 Comments) |

| analytical solution by Daniel (2018-06-20 14:40:55) |

Under Looking for a square result (in Just Math) Posted on 2018-06-14 (18 Comments) |

| re: derivation of the formula by Daniel (2018-06-16 20:48:52) |

| re: how about 2019 instead of 2018? by Daniel (2018-06-15 21:05:50) |

| re: n = 4 is a square, regardless of by Daniel (2018-06-15 12:18:31) |

Under Evaluate probability (in Probability) Posted on 2018-06-11 (1 Comments) |

| analytical solution by Daniel (2018-06-11 07:52:34) |

Under Palindrome in 4 steps (in Numbers) Posted on 2018-06-06 (4 Comments) |

| re: computer findings (spoilers) by Daniel (2018-06-06 14:49:31) |

Under Optimal result (in Just Math) Posted on 2018-06-04 (11 Comments) |

| re(4): What Ady wants (spoiler?) by Daniel (2018-06-05 18:56:40) |

| re(2): What Ady wants (spoiler?) by Daniel (2018-06-05 11:08:00) |

Under Using its own digits (in Numbers) Posted on 2018-05-31 (9 Comments) |

| re: beyond base 10, analytical solution by Daniel (2018-06-01 11:35:36) |

| beyond base 10, analytical solution by Daniel (2018-05-31 23:55:17) |

Under One digit answer (in Numbers) Posted on 2017-11-08 (3 Comments) |

| Solution by Daniel (2017-11-08 14:01:48) |

Under Does it continue? 5: powers of 2 (in Numbers) Posted on 2017-09-24 (6 Comments) |

| solution by Daniel (2017-09-24 13:12:51) |

Under Make It Even Again (in Probability) Posted on 2017-06-20 (4 Comments) |

| analytical solution by Daniel (2017-06-20 18:48:19) |

Under Pythagoras' corner (in Geometry) Posted on 2017-06-16 (3 Comments) |

| solution by Daniel (2017-06-16 11:56:04) |

Under Fifty-Fifty Again? (in Probability) Posted on 2017-06-14 (3 Comments) |

| re: Solution (spoiler) by Daniel (2017-06-14 14:27:02) |

Under Paradox? Not really (in Probability) Posted on 2017-06-13 (1 Comments) |

| No Subject by Daniel (2017-06-13 09:19:59) |

Under Red vs Black Cuts (in Numbers) Posted on 2017-06-05 (8 Comments) |

| re(3): Solution by Daniel (2017-06-05 10:28:01) |

| re: solution by Daniel (2017-06-05 09:40:27) |

| re: Solution by Daniel (2017-06-05 09:37:22) |

| solution by Daniel (2017-06-05 09:26:17) |

Under Delian delight (in Geometry) Posted on 2017-06-04 (3 Comments) |

| solution by Daniel (2017-06-04 14:27:49) |

Under Unbalanced?- No problem (in Weights and Scales) Posted on 2017-05-30 (7 Comments) |

| solution by Daniel (2017-05-30 08:58:51) |

Under Oleg or ErdÃ¶s? (in Games) Posted on 2017-05-26 (8 Comments) |

| re(3): my solution by Daniel (2017-05-27 09:59:44) |

| re(2): my solution by Daniel (2017-05-27 09:49:29) |

| my solution by Daniel (2017-05-26 14:51:54) |

Under Four balls (in Probability) Posted on 2017-05-19 (22 Comments) |

| re(2): I agree with Brian by Daniel (2017-05-19 23:38:41) |

Under Hands off! (in Weights and Scales) Posted on 2017-05-16 (3 Comments) |

| thought experiment approach by Daniel (2017-05-16 08:53:31) |

Under How much is "?" ? (in Numbers) Posted on 2017-05-13 (1 Comments) |

| ugly but works by Daniel (2017-05-13 13:25:31) |

Under Strange Summation (in Numbers) Posted on 2017-05-04 (1 Comments) |

| solution by Daniel (2017-05-04 08:37:45) |

Under Baker to butcher to baker (in Just Math) Posted on 2017-04-27 (2 Comments) |

| solution by Daniel (2017-04-27 11:58:56) |

Under Pretty primes (in Numbers) Posted on 2017-04-10 (2 Comments) |

| solution by Daniel (2017-04-10 14:43:02) |

Under POPANASIS (in Word Problems) Posted on 2017-03-23 (4 Comments) |

| Massive Search by Daniel (2017-03-24 09:01:15) |

Under Elongated Pentagonal Orthocupola's vertices (in Shapes) Posted on 2017-03-20 (3 Comments) |

| re(2): solution by Daniel (2017-03-20 13:23:47) |

| solution by Daniel (2017-03-20 11:21:34) |

Under Primes and factors (in Numbers) Posted on 2017-03-17 (2 Comments) |

| computer search by Daniel (2017-03-17 10:00:34) |

Under A false conjecture (in Numbers) Posted on 2017-01-27 (7 Comments) |

| re(2): computer attempt by Daniel (2017-01-29 13:12:03) |

Under Proving divisibility (in Just Math) Posted on 2017-01-08 (2 Comments) |

| proof by Daniel (2017-01-09 07:42:29) |

Under Same Real Roots (in Just Math) Posted on 2016-12-10 (2 Comments) |

| solution by Daniel (2016-12-10 09:04:05) |

Under Reciprocal Period Poser (in Just Math) Posted on 2016-10-29 (2 Comments) |

| solution by Daniel (2016-10-29 09:51:37) |

Under Symmetry helps! (in Just Math) Posted on 2016-10-26 (7 Comments) |

| re: my short solution by Daniel (2016-10-27 05:29:47) |

Under Simultaneous Settlement V (in Just Math) Posted on 2016-10-24 (2 Comments) |

| solution by Daniel (2016-10-24 08:15:16) |

Under List of triplets (in Just Math) Posted on 2016-10-21 (4 Comments) |

| re(3): solution by Daniel (2016-10-21 10:10:05) |

| re(2): solution by Daniel (2016-10-21 09:42:24) |

| solution by Daniel (2016-10-21 07:58:47) |

Under Dodecahedron Chance Determination (in Probability) Posted on 2016-10-20 (6 Comments) |

| re: clarification by Daniel (2016-10-20 14:14:25) |

| clarification by Daniel (2016-10-20 13:25:30) |

Under Why not marry? (in Logic) Posted on 2016-10-19 (6 Comments) |

| re: No Subject by Daniel (2016-10-19 21:36:06) |

| re: Two ways. (Third option) by Daniel (2016-10-19 11:16:36) |

Under Prime problem (in Just Math) Posted on 2016-10-03 (1 Comments) |

| solution by Daniel (2016-10-04 06:35:52) |

Under Summing up (in Sequences) Posted on 2016-08-17 (2 Comments) |

| solution by Daniel (2016-08-18 07:01:22) |

Under Form 21 n Times II (in Numbers) Posted on 2016-08-11 (5 Comments) |

| solution by Daniel (2016-08-11 09:47:46) |

Under Mirror multiplication (in Numbers) Posted on 2016-07-31 (8 Comments) |

| lots of them by Daniel (2016-07-31 20:59:38) |

Under Seventh Term Settlement (in Sequences) Posted on 2016-07-22 (10 Comments) |

| re(2): Analytical Solution by Daniel (2016-07-24 06:09:31) |

| Analytical Solution by Daniel (2016-07-23 06:43:50) |

Under Edge problem (in Geometry) Posted on 2016-05-31 (3 Comments) |

| solution by Daniel (2016-05-31 12:34:17) |

Under A comprehensive list (in Word Problems) Posted on 2016-05-19 (4 Comments) |

| re(2): my list by Daniel (2016-05-20 03:10:24) |

| my list by Daniel (2016-05-19 15:00:08) |

Under Cubic and Quadratic Determination (in Just Math) Posted on 2016-05-14 (3 Comments) |

| re(2): Possible solution by Daniel (2016-05-16 09:13:02) |

Under Divisible by 198 (in Just Math) Posted on 2016-05-12 (2 Comments) |

| analytical solution by Daniel (2016-05-12 09:54:54) |

Under Real Expression Ratio Resolution (in Just Math) Posted on 2016-05-08 (1 Comments) |

| solution by Daniel (2016-05-08 21:34:17) |

Under Countable sets (in Just Math) Posted on 2016-03-15 (8 Comments) |

| part 2 & 3 by Daniel (2016-03-15 11:44:42) |

Under Miles to Kilometers (in General) Posted on 2016-02-26 (3 Comments) |

| quick Excel solution by Daniel (2016-02-26 09:50:52) |

Under Last term zero (in Sequences) Posted on 2016-01-28 (3 Comments) |

| solution by Daniel (2016-01-28 09:23:03) |

Under Irrational Decision (in Just Math) Posted on 2015-11-15 (6 Comments) |

| most of a general proof by Daniel (2015-11-17 15:26:00) |

| re(3): N=2 only by Daniel (2015-11-16 20:53:52) |

Under Sphere Intersections (in Geometry) Posted on 2015-11-11 (4 Comments) |

| analytical solution by Daniel (2015-11-11 14:20:46) |

Under Triangular and Square Settlement (in Just Math) Posted on 2015-10-13 (7 Comments) |

| re(3): possible solution. //infinitely many ? by Daniel (2015-10-14 07:11:46) |

Under Wise and nice (in Word Problems) Posted on 2015-10-05 (3 Comments) |

| solution by Daniel (2015-10-05 11:35:06) |

Under Some definite results (in Numbers) Posted on 2015-09-17 (5 Comments) |

| re: non-analytic solution by Daniel (2015-09-18 00:52:10) |

Under 26 letters needed (in Word Problems) Posted on 2015-07-31 (1 Comments) |

| solution by Daniel (2015-07-31 12:39:20) |

Under No letters (in Cryptography) Posted on 2015-07-27 (2 Comments) |

| computer solution by Daniel (2015-07-27 14:04:59) |

Under xyz inequality (in Just Math) Posted on 2015-07-24 (1 Comments) |

| solution by Daniel (2015-07-24 08:45:54) |

Under Nine trolls (in Just Math) Posted on 2015-07-23 (9 Comments) |

| computer solution by Daniel (2015-07-23 10:13:56) |

Under Pieces of eight (in Just Math) Posted on 2015-07-15 (2 Comments) |

| analytical solution by Daniel (2015-07-15 10:36:48) |

Under Something is "some night" (in Word Problems) Posted on 2015-07-13 (1 Comments) |

| solution by Daniel (2015-07-13 07:45:39) |

Under One 1 to Six 6's (in Probability) Posted on 2015-07-01 (14 Comments) |

| re: more results (11 and 12) by Daniel (2015-07-04 09:45:05) |

| more results by Daniel (2015-07-03 21:01:10) |

| re(5): computer aided solution (lots more) by Daniel (2015-07-03 21:00:09) |

Under On his way to fitness (in Just Math) Posted on 2015-06-15 (10 Comments) |

| statistical approach by Daniel (2015-06-15 12:51:38) |

Under No direct evaluation (in Numbers) Posted on 2015-06-09 (4 Comments) |

| re(3): Solution by Daniel (2015-06-09 13:33:51) |

| re: Solution by Daniel (2015-06-09 09:43:07) |

Under Septic Factorization (in Just Math) Posted on 2015-06-07 (5 Comments) |

| another approach by Daniel (2015-06-08 11:47:38) |

Under Find Points, Maximise Ratio (in Shapes) Posted on 2015-06-05 (6 Comments) |

| solution by Daniel (2015-06-05 13:02:15) |

Under Near Fermat Formulation (in Just Math) Posted on 2015-05-11 (4 Comments) |

| re(2): solution by Daniel (2015-05-12 04:45:21) |

| solution by Daniel (2015-05-11 13:20:55) |

Under Short advice (in Cryptography) Posted on 2015-05-08 (6 Comments) |

| re: Misunderstanding by Daniel (2015-05-08 12:28:54) |

Under Seventeen divides expression? (in Just Math) Posted on 2015-04-26 (3 Comments) |

| solution by Daniel (2015-04-27 11:23:51) |

Under Non-empty sets element count (in Just Math) Posted on 2015-04-13 (5 Comments) |

| re: Answer only by Daniel (2015-04-13 13:47:57) |

| solution by Daniel (2015-04-13 13:46:10) |

Under Bright light (in Science) Posted on 2015-04-09 (9 Comments) |

| my solution by Daniel (2015-04-09 11:36:31) |

Under Two Tree Trial (in Word Problems) Posted on 2015-04-09 (3 Comments) |

| silly answer by Daniel (2015-04-09 09:06:44) |

Under Long-life recipe (in Logic) Posted on 2015-04-06 (1 Comments) |

| silly answer by Daniel (2015-04-06 13:59:50) |

Under Vive la petite diffÃ©rence! (in Paradoxes) Posted on 2015-04-06 (3 Comments) |

| answer...maybe by Daniel (2015-04-06 10:58:03) |

Under 123456789 scrambled (in Numbers) Posted on 2015-03-19 (6 Comments) |

| re(5): computer solution by Daniel (2015-03-22 04:34:56) |

Under Root sum equals integer (in Just Math) Posted on 2015-03-10 (7 Comments) |

| re(2): solution & playing around by Daniel (2015-03-10 15:13:01) |

Under Cryptajoke III (in Logic) Posted on 2015-02-23 (3 Comments) |

| solution by Daniel (2015-02-23 14:41:22) |

Under Integer Polynomial Illation (in Just Math) Posted on 2015-02-22 (1 Comments) |

| solution by Daniel (2015-02-23 09:20:06) |

Under Some special sums (in Numbers) Posted on 2015-02-05 (4 Comments) |

| solution by Daniel (2015-02-05 15:11:27) |

| re: Odd premise (spoiler) new challenge by Daniel (2015-02-05 14:46:07) |

Under A symmetric relation (in Just Math) Posted on 2014-11-19 (5 Comments) |

| solution by Daniel (2014-11-19 08:28:56) |

Under Recruiting Crisis (in Algorithms) Posted on 2014-10-03 (1 Comments) |

| solution by Daniel (2014-10-10 12:59:49) |

Under Primes vs ones (in Numbers) Posted on 2014-03-27 (2 Comments) |

| Proof by Daniel (2014-03-28 01:07:56) |

Under Four Egyptian Fractions (in Numbers) Posted on 2013-11-13 (6 Comments) |

| re: typos and omissions by Daniel (2013-11-13 13:15:22) |

| analytical solution by Daniel (2013-11-13 12:07:45) |

Under Quadratic Quandary (in Just Math) Posted on 2013-11-04 (6 Comments) |

| re: Jer seems right; I must have erred somewhere by Daniel (2013-11-05 21:20:59) |

Under Divisor Sum Digits (in Just Math) Posted on 2013-10-11 (1 Comments) |

| analytical solution by Daniel (2013-10-12 08:20:26) |

Under GCD to product (in Just Math) Posted on 2013-10-03 (4 Comments) |

| analytical solution by Daniel (2013-10-03 16:17:54) |

Under Repunit Rigor II (in Just Math) Posted on 2013-10-01 (3 Comments) |

| upper limit by Daniel (2013-10-02 10:36:11) |

Under mistakes (in Numbers) Posted on 2013-09-27 (2 Comments) |

| solution by Daniel (2013-09-27 13:29:00) |

Under Simultaneous Settlement II (in Just Math) Posted on 2013-09-26 (3 Comments) |

| re: solution by Daniel (2013-09-26 15:14:27) |

| analytical solution by Daniel (2013-09-26 11:28:03) |

Under Smallinomial (in Just Math) Posted on 2013-09-25 (2 Comments) |

| analytical solution by Daniel (2013-09-25 14:02:20) |

Under Rooted to the Floor (in Just Math) Posted on 2013-09-24 (1 Comments) |

| anaylitical solution by Daniel (2013-09-25 11:54:01) |

Under Perfectly Differentiated (in Just Math) Posted on 2013-09-21 (1 Comments) |

| analytical solution by Daniel (2013-09-23 11:14:09) |

Under play with digit (in Numbers) Posted on 2013-09-10 (1 Comments) |

| solution by Daniel (2013-09-10 10:16:02) |

Under Supreme Value Validation (in Just Math) Posted on 2013-09-08 (3 Comments) |

| solution by Daniel (2013-09-08 21:42:44) |

Under The 1234 Problem (in Numbers) Posted on 2013-09-05 (1 Comments) |

| solution by Daniel (2013-09-05 11:19:23) |

Under All zeroes solution (in Numbers) Posted on 2013-09-01 (3 Comments) |

| solution by Daniel (2013-09-01 21:50:26) |

Under The cunning Condition (in Just Math) Posted on 2013-08-25 (5 Comments) |

| full solution by Daniel (2013-08-25 18:03:26) |

Under Different Gender (in Logic) Posted on 2013-08-21 (2 Comments) |

| analytical solution by Daniel (2013-08-21 10:07:25) |

Under Root sum or integer? (in Just Math) Posted on 2013-08-18 (6 Comments) |

| the hard way by Daniel (2013-08-18 11:18:11) |

Under NegaBinary Numbers (in Algorithms) Posted on 2013-08-14 (2 Comments) |

| solution by Daniel (2013-08-14 21:20:31) |

Under Rectangle to Square (in Geometry) Posted on 2013-08-13 (9 Comments) |

| re(3): Full solution by Daniel (2013-08-16 14:50:13) |

| re: Full solution by Daniel (2013-08-16 10:34:57) |

| re: Full solution by Daniel (2013-08-15 17:10:36) |

Under Sitting on the Fence (in Probability) Posted on 2013-08-13 (5 Comments) |

| re(2): solution, different result by Daniel (2013-08-13 14:14:03) |

| solution by Daniel (2013-08-13 10:27:59) |

Under An Elusive Quadratic (in Numbers) Posted on 2013-08-09 (2 Comments) |

| found one by Daniel (2013-08-09 22:38:37) |

Under Seven - with and without (in Numbers) Posted on 2013-08-09 (6 Comments) |

| solution by Daniel (2013-08-09 11:35:30) |

Under Not applicable to driving (in Riddles) Posted on 2013-08-08 (2 Comments) |

| answer by Daniel (2013-08-08 10:16:06) |

Under Geometric Sequence Settlement (in Sequences) Posted on 2013-08-07 (4 Comments) |

| solution with proof by Daniel (2013-08-08 10:55:54) |

Under Testy Triplet Treat (in Just Math) Posted on 2013-08-04 (7 Comments) |

| re(3): results so far, but no proof in sight by Daniel (2013-08-04 15:42:58) |

Under Forcing a Polynomial Factor (in Just Math) Posted on 2013-08-03 (4 Comments) |

| solution by Daniel (2013-08-03 22:45:59) |

Under Non Sloane Surmise (in Sequences) Posted on 2013-08-02 (4 Comments) |

| re(2): solution by Daniel (2013-08-03 22:30:58) |

| solution by Daniel (2013-08-02 23:17:14) |

Under Squarely Sorted (in Numbers) Posted on 2013-07-27 (4 Comments) |

| answer with proof by Daniel (2013-07-27 11:33:51) |

Under A Pleasurable Puzzle (in Just Math) Posted on 2013-07-26 (1 Comments) |

| complete solution by Daniel (2013-07-27 14:43:40) |

Under Factorials AND Powers (in Numbers) Posted on 2013-07-11 (2 Comments) |

| re: solution (exact confirmation) by Daniel (2013-07-11 21:34:09) |

Under Just asking (in Just Math) Posted on 2013-07-03 (1 Comments) |

| highly precise answer by Daniel (2013-07-03 10:55:22) |

Under 222 (in Word Problems) Posted on 2013-07-02 (11 Comments) |

| more 2's for me too by Daniel (2013-07-02 11:07:18) |

Under The Exclusive Club (in Paradoxes) Posted on 2013-07-01 (8 Comments) |

| re(4): solution by Daniel (2013-07-02 05:15:43) |

| re(3): solution by Daniel (2013-07-01 21:13:55) |

| solution by Daniel (2013-07-01 18:15:22) |

Under Easy Findings (in Numbers) Posted on 2013-06-26 (3 Comments) |

| analytical solution by Daniel (2013-06-27 17:00:06) |

Under Lion and Tamer (in Logic) Posted on 2013-06-10 (7 Comments) |

| full answer by Daniel (2013-06-10 17:50:23) |

Under A bee in my hand (in Riddles) Posted on 2013-05-22 (3 Comments) |

| answer by Daniel (2013-05-22 11:35:57) |

Under Prime Fibonacci numbers (in Numbers) Posted on 2013-05-03 (3 Comments) |

| re: Exploration by Daniel (2013-05-04 02:04:09) |

Under Liar Logic (in Liars and Knights) Posted on 2013-04-11 (2 Comments) |

| Solution by Daniel (2013-04-11 09:55:22) |

Under Goldbach revisited (in Numbers) Posted on 2013-03-15 (2 Comments) |

| exact answers by Daniel (2013-03-15 13:42:27) |

Under Strange Equation (in Just Math) Posted on 2013-03-11 (10 Comments) |

| re: Equation by Daniel (2013-03-21 01:15:39) |

| re: solution by Daniel (2013-03-15 02:02:43) |

Under Intriguing Integral Illation (in Calculus) Posted on 2013-03-02 (6 Comments) |

| exact solution by Daniel (2013-03-03 01:28:12) |

Under Geometric Generalization (in Probability) Posted on 2013-02-28 (6 Comments) |

| full solution by Daniel (2013-02-28 13:21:38) |

Under Underground occupation (in Cryptography) Posted on 2013-02-26 (4 Comments) |

| re(2): Observations....H I N T/ partial spoiler by Daniel (2013-02-27 09:48:34) |

Under A little Generalization (in Numbers) Posted on 2012-12-18 (2 Comments) |

| solution by Daniel (2012-12-18 11:13:23) |

Under Exploring HCNs (in Numbers) Posted on 2012-10-26 (5 Comments) |

| Part 3 by Daniel (2012-10-28 07:09:31) |

| Part 2 by Daniel (2012-10-28 07:02:11) |

| Part 1 by Daniel (2012-10-28 06:58:03) |

Under The Magnificent Eleven (in Numbers) Posted on 2012-07-07 (3 Comments) |

| Computer Solution by Daniel (2012-07-07 11:57:03) |

Under 682 (in Numbers) Posted on 2012-04-13 (12 Comments) |

| another solution by Daniel (2012-04-16 08:36:49) |

| solution by Daniel (2012-04-14 16:38:04) |

Under More about 1729 (in Numbers) Posted on 2012-01-04 (8 Comments) |

| re(2): computer solution by Daniel (2012-01-04 14:31:42) |

Under Fair play (in Probability) Posted on 2011-12-30 (3 Comments) |

| pascal solution by Daniel (2011-12-31 08:28:16) |

Under Orthogonal Tangents (in Geometry) Posted on 2011-11-30 (2 Comments) |

| solution by Daniel (2011-12-01 10:35:19) |

Under Timely determination (in Just Math) Posted on 2011-11-29 (2 Comments) |

| re: Hmm by Daniel (2011-11-30 09:45:12) |

Under Build one – get two free (in Numbers) Posted on 2011-10-08 (5 Comments) |

| re(2): first one ( maybe more) by Daniel (2011-10-09 07:47:56) |

| first one ( maybe more) by Daniel (2011-10-09 04:07:43) |

Under Multiply Digits, Get Quadratic (in Just Math) Posted on 2011-10-05 (2 Comments) |

| full solution (no computer) by Daniel (2011-10-05 11:09:58) |

Under Q: What time is it now, dear R.? (in Just Math) Posted on 2011-09-19 (9 Comments) |

| re: solution by Daniel (2011-09-19 15:14:58) |

| solution by Daniel (2011-09-19 14:48:58) |

Under The Scenic Route (in General) Posted on 2011-09-15 (1 Comments) |

| full solution by Daniel (2011-09-15 12:15:11) |

Under Diophantine quickie II (in Just Math) Posted on 2011-09-09 (1 Comments) |

| full solution by Daniel (2011-09-09 10:54:06) |

Under Sweet 17 (in Numbers) Posted on 2011-09-05 (3 Comments) |

| solution by Daniel (2011-09-05 11:35:33) |

Under It is not hard (in Word Problems) Posted on 2011-08-29 (8 Comments) |

| solution by Daniel (2011-08-29 19:14:20) |

Under Sum of cubes and squares (in Just Math) Posted on 2011-08-28 (2 Comments) |

| solution by Daniel (2011-08-28 19:06:43) |

Under Icy winter shifting (in Just Math) Posted on 2011-08-24 (4 Comments) |

| solution by Daniel (2011-08-24 12:33:27) |

Under Math pyramid (in Just Math) Posted on 2011-08-20 (1 Comments) |

| solution by Daniel (2011-08-24 12:08:44) |

Under Logarithmic Equality (in Just Math) Posted on 2011-05-29 (1 Comments) |

| complete solution by Daniel (2011-05-30 10:37:07) |

Under Chime spacing. (in Just Math) Posted on 2011-05-12 (2 Comments) |

| first shot by Daniel (2011-05-12 13:22:36) |

Under Powering up the digits IV (in Numbers) Posted on 2011-04-21 (2 Comments) |

| re: solution by Daniel (2012-12-18 15:49:07) |

Under Sum (expression) = 10*n (in Just Math) Posted on 2011-02-22 (5 Comments) |

| re(3): Possible solution by Daniel (2011-02-23 11:41:08) |

Under Pythagoras Unconventional (in Numbers) Posted on 2011-02-10 (10 Comments) |

| re(2): one possible choice by Daniel (2011-02-11 10:30:08) |

| complete list from Mathematica search by Daniel (2011-02-10 14:14:05) |

| Mathematica search by Daniel (2011-02-10 14:12:27) |

Under e^(e^x) (in Calculus) Posted on 2011-02-08 (5 Comments) |

| possible solution by Daniel (2011-02-08 15:59:41) |

Under Three Term Trial (in Just Math) Posted on 2011-01-15 (4 Comments) |

| re: Restating the Problem by Daniel (2011-01-16 05:35:50) |

Under I WONDER (in Logic) Posted on 2011-01-13 (10 Comments) |

| my solution by Daniel (2011-01-13 12:14:32) |

Under Some strings attached (in Just Math) Posted on 2010-12-19 (2 Comments) |

| answer for kc=5 by Daniel (2010-12-21 21:15:51) |

Under Altered Parabolas (in Shapes) Posted on 2010-12-01 (2 Comments) |

| part 2: full solution by Daniel (2010-12-04 03:11:54) |

| part 1: full solution by Daniel (2010-12-04 02:58:13) |

Under Weights that check themselves. (in Weights and Scales) Posted on 2010-11-23 (6 Comments) |

| 5 weights initial search by Daniel (2010-11-24 05:30:22) |

| re: solution by Daniel (2010-11-24 05:26:41) |

Under Fun Function (in Calculus) Posted on 2010-11-23 (1 Comments) |

| full solution by Daniel (2010-11-23 17:46:20) |

Under 55th in the list (in Numbers) Posted on 2010-10-28 (6 Comments) |

| re(3): solution (zero or not) SPOILER by Daniel (2010-10-29 16:19:46) |

Under 5 conditions to get 2 results (in Just Math) Posted on 2010-10-21 (3 Comments) |

| pencil & paper solution by Daniel (2010-10-22 02:35:35) |

Under Big, super and prime (in Numbers) Posted on 2010-10-20 (8 Comments) |

| re: Another method. by Daniel (2010-10-20 12:50:37) |

| computer solution by Daniel (2010-10-20 12:02:07) |

Under Oodles of Factors II (in Numbers) Posted on 2010-10-11 (7 Comments) |

| re(2): Part C by Daniel (2010-10-12 11:58:25) |

| Part C by Daniel (2010-10-11 19:45:39) |

| re(2): thoughts on part B (confirmation) by Daniel (2010-10-11 19:34:24) |

Under Optimal Card Drawing Strategy 2 (in Games) Posted on 2010-10-02 (5 Comments) |

| re(3): C = 19, R = 6 by Daniel (2010-10-03 23:34:48) |

| re: C = 19, R = 6 by Daniel (2010-10-03 09:43:16) |

Under No way to run a railroad. (in Numbers) Posted on 2010-10-01 (5 Comments) |

| re: extra credit by Daniel (2010-10-02 21:07:19) |

| extra credit by Daniel (2010-10-02 12:07:02) |

| computer solution by Daniel (2010-10-02 11:43:01) |

Under Fraction and Root (in Just Math) Posted on 2010-09-30 (1 Comments) |

| analytical solution by Daniel (2010-09-30 23:55:15) |

Under Sum and Square Root Sum (in Just Math) Posted on 2010-09-25 (3 Comments) |

| analytical solution by Daniel (2010-09-25 13:36:26) |

Under Rationalize by factorials (in Numbers) Posted on 2010-09-22 (2 Comments) |

| proof by Daniel (2010-09-22 11:08:19) |

Under If....Then... (in Logic) Posted on 2010-09-21 (4 Comments) |

| computer solution (with diagnals) by Daniel (2010-09-21 22:03:37) |

| computer solution (no diagnals) by Daniel (2010-09-21 21:58:47) |

Under Two Center Distance (in Geometry) Posted on 2010-09-18 (3 Comments) |

| re: Guesstimate by Daniel (2010-09-20 02:44:23) |

Under Three circles (in Calculus) Posted on 2010-09-09 (3 Comments) |

| re: Another approach (spoiler) by Daniel (2010-09-11 22:37:01) |

| No Subject by Daniel (2010-09-09 17:34:17) |

Under Sum (Squares) = Prime Number (in Just Math) Posted on 2010-09-09 (2 Comments) |

| analytical solution by Daniel (2010-09-09 13:09:42) |

Under Heiro's Wager (in Numbers) Posted on 2010-09-08 (3 Comments) |

| first four by Daniel (2010-09-08 23:01:30) |

Under Optimal Card Drawing Strategy (in Games) Posted on 2010-09-07 (7 Comments) |

| re(2): a hint by Daniel (2010-09-12 04:53:50) |

| a hint by Daniel (2010-09-11 12:44:50) |

| re: Long analysis of a simple case by Daniel (2010-09-08 20:32:53) |

Under Tennis,anyone? (in Probability) Posted on 2010-09-07 (7 Comments) |

| solution by Daniel (2010-09-07 11:47:01) |

Under Never prime! (2) (in Numbers) Posted on 2010-09-04 (4 Comments) |

| solution and observations by Daniel (2010-09-04 19:22:49) |

Under Factorionids (in Numbers) Posted on 2010-08-28 (3 Comments) |

| extended subfactorial by Daniel (2010-08-29 05:08:32) |

| extended factorial by Daniel (2010-08-29 02:52:05) |

Under R&R (in Sequences) Posted on 2010-08-25 (5 Comments) |

| shot in the dark by Daniel (2010-08-25 11:49:31) |

Under Prime, but not forever (in Sequences) Posted on 2010-08-12 (1 Comments) |

| proof by Daniel (2010-08-12 13:42:36) |

Under Set of Lines with a Condition (in Just Math) Posted on 2010-08-11 (1 Comments) |

| solution by Daniel (2010-08-11 20:08:26) |

Under Powerful and consecutive (in Numbers) Posted on 2010-08-09 (16 Comments) |

| re: An interesting remark ***** Spoiler by Daniel (2010-08-09 18:16:30) |

Under Flying Low (in Numbers) Posted on 2010-08-05 (5 Comments) |

| mathematica solution by Daniel (2010-08-05 11:52:53) |

Under (x!+1)/(x+1) = prime number (in Probability) Posted on 2010-07-30 (9 Comments) |

| search is over by Daniel (2010-07-31 20:29:48) |

| mathematica solutions (so far) by Daniel (2010-07-30 20:06:11) |

Under Tangent Trapezoid (in Geometry) Posted on 2010-07-28 (1 Comments) |

| analytical solution by Daniel (2010-07-28 16:26:33) |

Under Triangle from Two Lines (in Geometry) Posted on 2010-07-01 (2 Comments) |

| first part by Daniel (2010-07-01 12:47:57) |

Under Concatenated Numbers and Divisibility (in Numbers) Posted on 2010-06-29 (7 Comments) |

| analytical solution by Daniel (2010-06-29 13:55:19) |

Under Number = Sum (Digit)*Product (Digit) (in Numbers) Posted on 2010-06-21 (10 Comments) |

| re: Solution & thoughts by Daniel (2010-06-21 21:11:59) |

Under 129 digits (in Numbers) Posted on 2010-06-18 (6 Comments) |

| new interpretation by Daniel (2010-06-18 17:48:00) |

| some thoughts and solutions by Daniel (2010-06-18 16:55:09) |

Under Prime and Divisors Derivation (in Just Math) Posted on 2010-06-17 (3 Comments) |

| analytical solution by Daniel (2010-06-17 13:03:40) |

Under A Magic Die (in Probability) Posted on 2010-06-10 (8 Comments) |

| analytical solution by Daniel (2010-06-10 12:03:08) |

Under Exponential Difficulties 3 (in Just Math) Posted on 2010-06-05 (1 Comments) |

| analytical solution by Daniel (2010-06-05 23:17:04) |

Under 50 - Digit Number II (in Just Math) Posted on 2010-05-29 (9 Comments) |

| analytical solution by Daniel (2010-05-29 13:37:30) |

Under Iterated Specs (in Just Math) Posted on 2010-05-28 (4 Comments) |

| number theory approach by Daniel (2010-05-28 12:26:47) |

Under Make it equal (in Numbers) Posted on 2010-05-26 (7 Comments) |

| half of it by Daniel (2010-05-26 16:52:29) |

Under Odd primes never die (in Numbers) Posted on 2010-05-20 (11 Comments) |

| re(2): update MORE DETAILS - not a spoiler by Daniel (2010-05-22 20:36:07) |

| update by Daniel (2010-05-22 01:19:56) |

| update by Daniel (2010-05-21 17:54:40) |

| some solutions (maybe) by Daniel (2010-05-21 13:46:55) |

| further study by Daniel (2010-05-20 13:22:00) |

| perhaps some clarification by Daniel (2010-05-20 12:16:40) |

Under Sum Squares = 2009 Subtraction (in Just Math) Posted on 2010-05-09 (3 Comments) |

| re(2): computer solution -- and computer language speeds by Daniel (2010-05-10 10:29:06) |

Under Self-Cardinality (in Numbers) Posted on 2010-05-07 (5 Comments) |

| re(3): A possible solution by Daniel (2010-05-08 01:05:47) |

| re: A possible solution by Daniel (2010-05-07 14:05:34) |

Under Wins 2 - wins all (in Probability) Posted on 2010-05-06 (5 Comments) |

| analytical solution by Daniel (2010-05-06 12:46:18) |

Under 2*P + 2 = Perfect Square? (in Just Math) Posted on 2010-05-01 (5 Comments) |

| re(2): a computerized start but no proof and too small a sample size by Daniel (2010-05-03 10:31:08) |

Under Sum Square Grid Row & Column ≠ 0 (in Numbers) Posted on 2010-04-29 (6 Comments) |

| re: a simple proof by Daniel (2010-04-29 15:29:54) |

Under Sum Square Roots ≤ Real Number (in Just Math) Posted on 2010-04-10 (4 Comments) |

| analytical solution by Daniel (2010-04-10 19:01:31) |

Under Twelve Divisor Trial (in Probability) Posted on 2010-04-09 (7 Comments) |

| analytical solution by Daniel (2010-04-09 14:30:21) |

Under Limiting Mean part 2 (in Calculus) Posted on 2010-03-10 (2 Comments) |

| analytical solutions by Daniel (2010-03-10 11:33:54) |

Under Pythagoras knew it!! (in Numbers) Posted on 2010-03-05 (5 Comments) |

| re(2): my attempt by Daniel (2010-03-05 20:21:17) |

| my attempt by Daniel (2010-03-05 17:10:36) |

Under Eccentric Integral (in Calculus) Posted on 2010-02-18 (2 Comments) |

| analytical solution by Daniel (2010-02-19 12:15:26) |

Under Succinct Age Settlement (in Just Math) Posted on 2010-02-09 (7 Comments) |

| analytical solution by Daniel (2010-02-09 12:01:26) |

Under Drop into the Bucket (in Shapes) Posted on 2010-02-03 (9 Comments) |

| solution by Daniel (2010-02-03 12:02:16) |

Under P^{X }+ 144 = Perfect Square (in Just Math) Posted on 2010-01-12 (9 Comments) |

| analytical solution by Daniel (2010-01-12 11:53:50) |

Under 15-Digits and Repunit Division (in Numbers) Posted on 2010-01-07 (4 Comments) |

| mathematica solution by Daniel (2010-01-07 12:53:17) |

Under Delicate Derivative Derivation (in Calculus) Posted on 2009-12-18 (2 Comments) |

| analytical solution by Daniel (2009-12-18 13:35:14) |

Under More Collinear Points (in Geometry) Posted on 2009-12-11 (4 Comments) |

| re(2): counterproof (maybe) by Daniel (2009-12-12 16:00:17) |

| counterproof (maybe) by Daniel (2009-12-12 10:37:21) |

Under 3x3 Grid Near Magic (in Probability) Posted on 2009-12-05 (6 Comments) |

| computer solution by Daniel (2009-12-05 13:12:45) |

Under A Normal and a Parabola (in Calculus) Posted on 2009-12-02 (4 Comments) |

| re(2): solution error found by Daniel (2009-12-02 22:08:16) |

| solution by Daniel (2009-12-02 12:13:35) |

Under Disagreeable Calculator (in Just Math) Posted on 2009-12-01 (5 Comments) |

| sequences by Daniel (2009-12-01 13:22:33) |

Under Reverse, Add, Palindrome (in Numbers) Posted on 2009-11-27 (4 Comments) |

| computer solution by Daniel (2009-11-27 16:31:45) |

Under Postal Service (in Numbers) Posted on 2009-11-17 (4 Comments) |

| computer solutions by Daniel (2009-11-17 13:18:53) |

Under Getting Powerful With Euler II (in Calculus) Posted on 2009-11-10 (4 Comments) |

| re(2): puzzling by Daniel (2009-11-10 20:31:36) |

Under Sum (Pair Product) = Sum (Triplet Product) (in Probability) Posted on 2009-11-08 (3 Comments) |

| questions? by Daniel (2009-11-08 14:51:02) |

Under Positive Integer ≠ (2^{P} – 2^{Q})/(2^{R} – 2^{S}) (in Just Math) Posted on 2009-11-07 (3 Comments) |

| solution conditions by Daniel (2009-11-08 07:16:04) |

| solution with proof by Daniel (2009-11-07 17:18:52) |

Under 4xy - x – y ≠ Perfect Square (in Just Math) Posted on 2009-11-01 (3 Comments) |

| re: No Subject by Daniel (2009-11-02 12:33:50) |

Under Author Ascertainment (in Cryptography) Posted on 2009-10-13 (1 Comments) |

| solution (spoiler) by Daniel (2009-10-13 12:50:30) |

Under 8 points no convex pentagon (in Shapes) Posted on 2009-10-09 (4 Comments) |

| possible real solution (not proven yet) by Daniel (2009-10-09 13:37:53) |

| possible cheat by Daniel (2009-10-09 13:21:31) |

Under Mensa Maze (in General) Posted on 2009-10-07 (8 Comments) |

| re: Best Minimum? by Daniel (2009-10-07 15:43:13) |

| re: Best Minimum? by Daniel (2009-10-07 14:28:35) |

| a start by Daniel (2009-10-07 12:02:35) |

Under Reknit Tinker(ed) Ratio (in Numbers) Posted on 2009-10-04 (4 Comments) |

| computer solution by Daniel (2009-10-04 15:35:35) |

Under ABCD's Of Greatest Divisor (in Numbers) Posted on 2009-09-24 (3 Comments) |

| computer solution by Daniel (2009-09-24 11:33:15) |

Under Realmazure Rationale II (in Logic) Posted on 2009-09-23 (3 Comments) |

| re(2): solution by Daniel (2009-09-23 13:57:53) |

| solution by Daniel (2009-09-23 11:50:29) |

Under Triangular Transcension (in Numbers) Posted on 2009-09-22 (3 Comments) |

| computer solution by Daniel (2009-09-22 12:12:10) |

| computer solution by Daniel (2009-09-22 12:12:08) |

Under T_{i-1} + 2*(T_{i-1})^{-1} = 2*T_{i} + (T_{i})^{-1} (in Sequences) Posted on 2009-09-20 (1 Comments) |

| a start by Daniel (2009-09-20 15:27:47) |

Under Progressively Geometric (in Just Math) Posted on 2009-09-19 (4 Comments) |

| possible solution by Daniel (2009-09-19 21:47:49) |

Under Fractal Sequence (in Sequences) Posted on 2009-09-18 (1 Comments) |

| solution by Daniel (2009-09-18 12:06:59) |

Under Cutting the Card (in Shapes) Posted on 2009-09-16 (3 Comments) |

| one solution by Daniel (2009-09-16 12:24:01) |

Under Unit lengths from movable points to unit triangles. (in Geometry) Posted on 2009-09-14 (11 Comments) |

| re(2): more precision by Daniel (2009-09-15 00:05:21) |

| more precision by Daniel (2009-09-14 23:10:21) |

| intervals to 2 digits of precision (more to come) by Daniel (2009-09-14 22:31:07) |

| re(2): initial constraints (a start) by Daniel (2009-09-14 22:26:20) |

| Initial numerical results by Daniel (2009-09-14 19:32:55) |

| initial constraints (a start) by Daniel (2009-09-14 18:17:15) |

Under Legendre's Mistake (in Numbers) Posted on 2009-09-11 (1 Comments) |

| computer solution by Daniel (2009-09-12 11:30:37) |

Under Infinitely Continued (in Just Math) Posted on 2009-09-10 (2 Comments) |

| simpler solution by Daniel (2009-09-10 16:06:22) |

| computer aided analytic solution by Daniel (2009-09-10 11:46:47) |

Under Unit lengths and triangles (in Geometry) Posted on 2009-09-09 (2 Comments) |

| mathematica solution by Daniel (2009-09-09 14:58:36) |

Under More Consecutive Semiprimes (in Numbers) Posted on 2009-09-08 (4 Comments) |

| part 2 (computer solution) by Daniel (2009-09-08 12:57:22) |

| part 1 with proof by Daniel (2009-09-08 12:50:03) |

Under Minimum Value With Ratio (in Just Math) Posted on 2009-09-07 (2 Comments) |

| solution with proof by Daniel (2009-09-07 14:28:42) |

Under Near Perfect (in Numbers) Posted on 2009-09-06 (1 Comments) |

| computer solution by Daniel (2009-09-06 23:03:43) |

Under Greek Approximation (in Numbers) Posted on 2009-09-05 (2 Comments) |

| further findings by Daniel (2009-09-05 16:17:30) |

| computer solution by Daniel (2009-09-05 12:58:55) |

Under Some Products Differ by 94 (in Numbers) Posted on 2009-09-03 (2 Comments) |

| computer solution by Daniel (2009-09-03 13:32:27) |

Under Rotate the Outer (in Numbers) Posted on 2009-08-30 (2 Comments) |

| analytical solution by Daniel (2009-08-30 14:05:42) |

Under A! + B! + C! = 3^{D} (in Just Math) Posted on 2009-08-27 (5 Comments) |

| analytical solution by Daniel (2009-08-27 11:33:12) |

Under Priming a Square (in Numbers) Posted on 2009-08-23 (3 Comments) |

| mathematica solution by Daniel (2009-08-23 17:29:46) |

Under From Figsdale, Going to Garsville (in Just Math) Posted on 2009-08-22 (2 Comments) |

| spreadsheet solution by Daniel (2009-08-22 14:17:11) |

Under Year of the Roman (in Numbers) Posted on 2009-08-21 (5 Comments) |

| another interpretation by Daniel (2009-08-21 12:07:17) |

| an answer to start with by Daniel (2009-08-21 11:33:55) |

Under Number = Power Remainder (in Numbers) Posted on 2009-08-20 (3 Comments) |

| Qbasic solution by Daniel (2009-08-20 11:24:10) |

| Mathematica solution by Daniel (2009-08-20 11:17:59) |

Under The Shadow in a Sphere (in Shapes) Posted on 2009-08-19 (7 Comments) |

| clarification by Daniel (2009-08-19 11:53:35) |

Under Even Corners and Equal Subgrids (in Numbers) Posted on 2009-08-18 (5 Comments) |

| computer solution by Daniel (2009-08-18 13:07:23) |

Under Prime * Prime (in Numbers) Posted on 2009-08-15 (2 Comments) |

| pencil and paper solution by Daniel (2009-08-15 23:10:39) |

Under Piano and Potent Pane (in Numbers) Posted on 2009-08-12 (6 Comments) |

| basic solution by Daniel (2009-08-12 11:40:33) |

Under First Digit Four (in Numbers) Posted on 2009-08-08 (3 Comments) |

| mathematica solution by Daniel (2009-08-08 12:40:02) |

Under Even Erasure (in Just Math) Posted on 2009-08-05 (3 Comments) |

| analytical solution by Daniel (2009-08-05 12:01:19) |

Under Realmazure Rationale (in Logic) Posted on 2009-08-02 (4 Comments) |

| solution w/ explanation by Daniel (2009-08-02 13:50:53) |

Under How and When (in Numbers) Posted on 2009-07-29 (17 Comments) |

| re(5): two views by Daniel (2009-07-31 01:48:02) |

| re(2): two views (UBASIC) by Daniel (2009-07-30 20:29:21) |

| re(3): Integrity? (interesting property) by Daniel (2009-07-29 22:58:18) |

| re: Integrity? (interesting property) by Daniel (2009-07-29 18:05:42) |

Under Getting Powerful With Euler (in Calculus) Posted on 2009-07-28 (3 Comments) |

| exact solution by Daniel (2009-07-28 13:02:43) |

Under Dividing a Rectangle (in Geometry) Posted on 2009-07-25 (1 Comments) |

| solution by Daniel (2009-07-25 15:21:25) |

Under Sum = Cube Root 2, Triplet Not (in Just Math) Posted on 2009-07-23 (2 Comments) |

| proof with assumption by Daniel (2009-07-23 12:34:12) |

Under Word Grid (in Word Problems) Posted on 2009-07-19 (5 Comments) |

| computer solution by Daniel (2009-07-19 23:39:22) |

Under Some Inverses Sum Inverse (in Just Math) Posted on 2009-07-18 (2 Comments) |

| analytical solution by Daniel (2009-07-18 13:20:06) |

Under and W (in Word Problems) Posted on 2009-07-14 (5 Comments) |

| Google's thoughts by Daniel (2009-07-15 05:08:03) |

Under Reciprocals (in Just Math) Posted on 2009-07-12 (1 Comments) |

| analytical solution by Daniel (2009-07-12 13:32:09) |

Under Sum Powers Sum Square II (in Just Math) Posted on 2009-07-08 (6 Comments) |

| oops slight error by Daniel (2009-07-09 23:54:40) |

| re: Aaaaaah (furshlugginer formatting) - trying solution again by Daniel (2009-07-09 01:23:20) |

Under Partridge Pandigital Set (in Numbers) Posted on 2009-07-05 (3 Comments) |

| a pretty good start by Daniel (2009-07-05 11:55:43) |

Under How much time will you spend? (in Tricks) Posted on 2009-06-29 (3 Comments) |

| solution by Daniel (2009-06-29 21:20:52) |

Under Pandigital Processed Primes (in Numbers) Posted on 2009-06-27 (1 Comments) |

| solution by Daniel (2009-06-28 09:39:37) |

Under Subtract 1, get a square (in Just Math) Posted on 2009-06-24 (4 Comments) |

| re: general solution (no proof yet) by Daniel (2009-06-24 20:15:49) |

| general solution (no proof yet) by Daniel (2009-06-24 14:43:38) |

| computer solution by Daniel (2009-06-24 12:52:23) |

Under Bounded Sine (in Shapes) Posted on 2009-06-23 (2 Comments) |

| generalization by Daniel (2009-06-23 16:08:59) |

| solution by Daniel (2009-06-23 12:36:42) |

Under Multiply Sum and Sum of Squares (in Numbers) Posted on 2009-06-22 (4 Comments) |

| computer solution by Daniel (2009-06-22 12:42:06) |

Under THIS*THAT*IT (in Numbers) Posted on 2009-06-19 (3 Comments) |

| computer solution by Daniel (2009-06-19 12:55:27) |

Under The Shell Game (in Sequences) Posted on 2009-06-18 (4 Comments) |

| re(2): some thoughts and questions by Daniel (2009-06-18 23:17:24) |

| some thoughts and questions by Daniel (2009-06-18 12:09:35) |

Under Triangles and Squares (in Geometry) Posted on 2009-06-17 (4 Comments) |

| yellow/cyan proof by Daniel (2009-06-17 13:07:25) |

Under Two way tube. (in Shapes) Posted on 2009-06-15 (2 Comments) |

| general solution by Daniel (2009-06-16 02:05:15) |

| solution by Daniel (2009-06-15 19:05:41) |

Under Star in the Pentagon (in Geometry) Posted on 2009-06-09 (2 Comments) |

| computer solution by Daniel (2009-06-09 13:48:33) |

Under Pandigital and Pretty Powerful IV (in Numbers) Posted on 2009-06-06 (2 Comments) |

| computer solution by Daniel (2009-06-06 13:32:41) |

Under The 5 cards Magic trick Rechallenges! (in Logic) Posted on 2009-06-01 (4 Comments) |

| re(2): Corection To The Problem!!! Please Read by Daniel (2009-06-01 21:58:35) |

Under Pandigital Recycling Points (in Logic) Posted on 2009-05-31 (5 Comments) |

| analytic solution by Daniel (2009-05-31 13:30:35) |

| computer solution by Daniel (2009-05-31 13:07:45) |

Under Prime square with distinct digits (in Numbers) Posted on 2009-05-30 (2 Comments) |

| mathematica solution by Daniel (2009-05-30 13:01:42) |

Under 5 Cards Magic Trick (in Logic) Posted on 2009-05-29 (7 Comments) |

| my solution by Daniel (2009-05-29 14:25:22) |

Under Tri-Blades (in Geometry) Posted on 2009-05-28 (2 Comments) |

| complete solution by Daniel (2009-05-28 16:19:04) |

Under Try, Four and Five (in Numbers) Posted on 2009-05-27 (3 Comments) |

| computer solution by Daniel (2009-05-27 11:58:08) |

Under Circumcircle and Incircle (in Just Math) Posted on 2009-05-26 (4 Comments) |

| mathematica solution by Daniel (2009-05-26 12:39:20) |

Under Six Seat Schedule (in Logic) Posted on 2009-05-25 (4 Comments) |

| computer solution by Daniel (2009-05-25 14:35:08) |

Under Pairs of Prime Factors (in Numbers) Posted on 2009-05-24 (2 Comments) |

| mathematica solution by Daniel (2009-05-24 15:08:38) |

Under six = five (in Numbers) Posted on 2009-05-23 (2 Comments) |

| computer solution by Daniel (2009-05-23 12:39:26) |

Under See the top (in Numbers) Posted on 2009-05-21 (2 Comments) |

| computer solution by Daniel (2009-05-21 15:58:25) |

Under Tom and Harry Run to School (in Just Math) Posted on 2009-05-20 (2 Comments) |

| analytic solution by Daniel (2009-05-20 12:12:17) |

Under Getting Natural With Sine (in Calculus) Posted on 2009-05-19 (3 Comments) |

| analytic solution by Daniel (2009-05-19 13:04:15) |

Under Set of Primes (in Probability) Posted on 2009-05-18 (6 Comments) |

| re(2): solution by Daniel (2009-05-18 12:01:42) |

| solution by Daniel (2009-05-18 11:56:47) |

Under Roman Trivia (in Numbers) Posted on 2009-05-17 (5 Comments) |

| my output by Daniel (2009-05-17 17:04:47) |

| answers to 1,2,3 working on 4 by Daniel (2009-05-17 14:11:26) |

Under Curious Cubic Triplet(s) (in Just Math) Posted on 2009-05-16 (2 Comments) |

| Analytic solution by Daniel (2009-05-16 13:42:28) |

Under Dimensions of a box (in Calculus) Posted on 2009-05-15 (3 Comments) |

| solution by Daniel (2009-05-15 13:11:18) |

Under Roman Square (in Numbers) Posted on 2009-05-13 (4 Comments) |

| computer solution (all of them) by Daniel (2009-05-17 16:57:44) |

Under Pandigital and Pretty Powerful III (in Numbers) Posted on 2009-05-12 (4 Comments) |

| computer solution by Daniel (2009-05-12 13:10:34) |

Under Random chord problem (in Geometry) Posted on 2009-05-11 (15 Comments) |

| re(2): solution, maybe (good question) (my bad) by Daniel (2009-05-11 21:03:33) |

| re: solution, maybe (good question) by Daniel (2009-05-11 20:09:37) |

| solution by Daniel (2009-05-11 12:03:38) |

Under Magic Trick (in Numbers) Posted on 2009-05-10 (8 Comments) |

| re: my minimumm- spoiler by Daniel (2009-05-11 15:16:31) |

Under 2N Digit Numbers (in Numbers) Posted on 2009-05-09 (5 Comments) |

| 2 more by Daniel (2009-05-10 22:13:51) |

| re: computer solution by Daniel (2009-05-10 09:20:05) |

Under Pandigital and Pretty Powerful II (in Numbers) Posted on 2009-05-06 (2 Comments) |

| computer solution by Daniel (2009-05-06 11:51:47) |

Under Taking the 5th (in Numbers) Posted on 2009-05-03 (5 Comments) |

| re: Different signs (good point) by Daniel (2009-05-03 19:55:37) |

| computer solution by Daniel (2009-05-03 13:11:47) |

Under Curious Cubic Constant (in Numbers) Posted on 2009-05-02 (3 Comments) |

| computer solution by Daniel (2009-05-02 20:14:02) |

Under Binomial Pandigital(s) (in Numbers) Posted on 2009-04-28 (3 Comments) |

| Computer Solution by Daniel (2009-04-28 11:43:59) |

Under B-nary (in Numbers) Posted on 2009-04-27 (2 Comments) |

| re: somewhat of a solution (some thoughts) by Daniel (2009-04-27 21:44:10) |

Under ten - nine = 1 (in Numbers) Posted on 2009-04-23 (4 Comments) |

| computer solution by Daniel (2009-04-23 11:48:49) |

Under Factorials and Powers (in Just Math) Posted on 2009-04-22 (8 Comments) |

| analytical solution (not complete) by Daniel (2009-04-22 14:19:02) |

Under In a Mystery.... (in Word Problems) Posted on 2009-04-16 (12 Comments) |

| re: Another one by Daniel (2009-04-16 13:32:38) |

Under Newsless Alphametics (in Just Math) Posted on 2009-04-15 (5 Comments) |

| re: all's well that ends well by Daniel (2009-04-15 13:03:21) |

Under Powering up the digits (in Numbers) Posted on 2009-04-12 (4 Comments) |

| more solutions by Daniel (2009-04-13 14:54:01) |

| computer solution (spoiler) by Daniel (2009-04-12 17:06:14) |

Under Prime Squares (in Numbers) Posted on 2009-04-09 (4 Comments) |

| re(2): computer solution (spoiler) by Daniel (2009-04-09 16:59:59) |

| computer solution (spoiler) by Daniel (2009-04-09 11:42:29) |

Under Fifth root (cubic) = Cube root (quintic) (in Just Math) Posted on 2009-04-05 (5 Comments) |

| re: Oops! Solution by reading the problem. by Daniel (2009-04-05 17:54:38) |

Under Alphabet from 8 Words (in Word Problems) Posted on 2009-04-04 (4 Comments) |

| re(2): 2 solutions (spoiler) by Daniel (2009-04-05 09:27:38) |

| all computer solutions and code by Daniel (2009-04-05 04:01:58) |

| 2 solutions (spoiler) by Daniel (2009-04-05 03:43:19) |

Under Derivative chains. (in Calculus) Posted on 2009-03-29 (6 Comments) |

| re(2): Partially done but help needed (Spoiler) by Daniel (2009-03-31 21:03:02) |

Under Dicey numbers (in Numbers) Posted on 2009-03-27 (6 Comments) |

| Generalized solution by Daniel (2009-03-29 03:10:33) |

| re: edge of darkness / solution (pattern found) by Daniel (2009-03-28 00:22:38) |

Under The Hare and Tortoise Rematch (in General) Posted on 2009-03-26 (15 Comments) |

| re(4): Complete solution (spdsht explan) - Help by Daniel (2009-03-27 22:13:43) |

| re(2): Complete solution (spreadsheet explanation) by Daniel (2009-03-27 16:17:56) |

| re(2): Complete solution by Daniel (2009-03-27 05:24:08) |

| Complete solution by Daniel (2009-03-27 04:22:19) |

| re: Well, yes and no! by Daniel (2009-03-26 16:44:32) |

| Triangle Track solution by Daniel (2009-03-26 12:30:37) |

Under Edgy Integral (in Calculus) Posted on 2009-03-25 (4 Comments) |

| computer solution by Daniel (2009-03-25 13:11:15) |

Under Pandigital and Pretty Powerful (in Numbers) Posted on 2009-03-23 (4 Comments) |

| re(2): computer solution by Daniel (2009-03-23 18:01:16) |

| computer solution by Daniel (2009-03-23 11:47:27) |

Under Making integer an expression (in Just Math) Posted on 2009-03-20 (12 Comments) |

| re(3): Simplifying matters (Spoiler) (some thoughts) by Daniel (2009-03-25 19:06:29) |

| re: Simplifying matters (Spoiler) (some thoughts) by Daniel (2009-03-24 14:36:47) |

Under 8 Words (in Word Problems) Posted on 2009-03-19 (13 Comments) |

| helpfull info (word list) by Daniel (2009-03-19 17:23:32) |

Under Perplexing Dual Vowels (in Word Problems) Posted on 2009-03-13 (8 Comments) |

| about the sentence by Daniel (2009-03-14 12:38:05) |

Under 1+5+6+7 = 21? (in Numbers) Posted on 2009-03-12 (7 Comments) |

| re(2): one solution by Daniel (2009-03-12 12:46:02) |

| one solution by Daniel (2009-03-12 11:17:00) |

Under 2009 a cube? Baseless! (in Just Math) Posted on 2009-03-09 (5 Comments) |

| analytic solution by Daniel (2009-03-09 18:42:10) |

Under A Hand of Cards (in Logic) Posted on 2009-03-08 (3 Comments) |

| solution explanation by Daniel (2009-03-08 21:55:30) |

Under Sequence with only 3 numbers (in Just Math) Posted on 2009-03-07 (11 Comments) |

| general solution by Daniel (2009-03-07 22:59:00) |

| my solution by Daniel (2009-03-07 14:09:34) |

Under Integer Side Lengths (in Just Math) Posted on 2009-03-05 (8 Comments) |

| complete solution by Daniel (2009-03-05 12:22:46) |

Under Palindromic and Tautonymic (in Numbers) Posted on 2009-03-03 (5 Comments) |

| Computer Solution by Daniel (2009-03-03 13:29:50) |

Under Seq.(Seq.(Seq.)) seeking sod (in Sequences) Posted on 2009-03-01 (3 Comments) |

| re: True but unprovable by Daniel (2009-03-02 19:34:39) |

Under super powerful pandigitals (in Numbers) Posted on 2009-02-24 (7 Comments) |

| re: Uncertain by Daniel (2009-02-24 14:51:15) |

Under Curious Consecutive Cyphers II (in Just Math) Posted on 2009-02-23 (7 Comments) |

| re(3): Computer Solution by Daniel (2009-02-23 13:10:46) |

| Computer Solution by Daniel (2009-02-23 11:55:33) |

Under I Do Belong (in Numbers) Posted on 2009-02-22 (3 Comments) |

| re(2): computer solution by Daniel (2009-02-23 10:08:19) |

| computer solution by Daniel (2009-02-22 14:23:49) |

Under Two players, two pots (in Games) Posted on 2009-02-21 (2 Comments) |

| almost complete solution by Daniel (2009-02-21 18:43:08) |

Under Now, the Old Hat (in Numbers) Posted on 2009-02-20 (5 Comments) |

| re: Supercomputer? by Daniel (2009-02-20 12:36:56) |

| computer solution by Daniel (2009-02-20 12:04:35) |

Under The Prime Time Soccer Team (in Numbers) Posted on 2009-02-19 (3 Comments) |

| Mathematica Solution by Daniel (2009-02-19 11:55:21) |

Under Happy 2009 to you all (in Just Math) Posted on 2009-02-08 (3 Comments) |

| solution (no explanation) by Daniel (2009-02-09 00:34:54) |

Under Attack and defense (in Probability) Posted on 2009-02-06 (2 Comments) |

| my strategy by Daniel (2009-02-06 13:59:28) |

Under Why, it's elementary my dear 74851687! (in Riddles) Posted on 2009-02-04 (10 Comments) |

| re(2): some thoughts by Daniel (2009-02-04 13:42:36) |

| re: some thoughts by Daniel (2009-02-04 13:16:53) |

Under Hypercells (in Numbers) Posted on 2009-02-02 (10 Comments) |

| number of solutions by Daniel (2009-02-03 02:46:08) |

| re: 1 solution, program running for remaining by Daniel (2009-02-03 02:00:17) |

| 1 solution, program running for remaining by Daniel (2009-02-03 00:25:29) |

Under Fondu, anyone? (in General) Posted on 2009-02-02 (4 Comments) |

| solution (spoiler) by Daniel (2009-02-02 20:36:42) |

| I completely agree :-) by Daniel (2009-02-02 20:35:56) |

Under Winning the Competition (in Probability) Posted on 2009-01-25 (3 Comments) |

| clarification please by Daniel (2009-01-25 14:04:13) |

Under Prisoner's Visitors Problem (in Logic) Posted on 2009-01-21 (7 Comments) |

| re: (all solutions) UNCURSED! thanks by Daniel (2009-01-22 00:27:44) |

| program code by Daniel (2009-01-21 22:22:03) |

| (all solutions) (sign of the beast) by Daniel (2009-01-21 22:19:13) |

| initial idea by Daniel (2009-01-21 15:52:15) |

Under Even Perimeter (in Just Math) Posted on 2009-01-16 (3 Comments) |

| complete solution by Daniel (2009-01-16 12:26:51) |

Under A woman, her car, and a hotel... (in Riddles) Posted on 2009-01-13 (9 Comments) |

| Solution (spoiler) by Daniel (2009-01-13 23:58:41) |

Under January Math Challenge in 3 Parts (in Numbers) Posted on 2009-01-08 (5 Comments) |

| Part II (computer solution) by Daniel (2009-01-08 13:43:05) |

| Part I (computer solution) by Daniel (2009-01-08 13:39:19) |

Under Mighty Mysterious Missive (in Cryptography) Posted on 2009-01-03 (4 Comments) |

| method (spoiler) by Daniel (2009-01-04 05:03:07) |

| my answer by Daniel (2009-01-04 04:59:52) |

Under The box (in Just Math) Posted on 2009-01-02 (7 Comments) |

| somewhat analytical solution by Daniel (2009-01-02 21:41:48) |

Under The great tunnel switch II (in Algorithms) Posted on 2008-12-26 (9 Comments) |

| re(2): possible solution -Oh that easy? by Daniel (2008-12-27 05:30:52) |

| possible solution by Daniel (2008-12-27 03:13:52) |

Under Boats (in Just Math) Posted on 2008-12-22 (3 Comments) |

| complete solution by Daniel (2008-12-22 16:39:08) |

Under Some Factorials Sum Power (in Just Math) Posted on 2008-12-21 (4 Comments) |

| re(2): solution with proof - Kudos! by Daniel (2008-12-22 15:37:58) |

| solution with proof by Daniel (2008-12-22 00:41:08) |

Under The last locker (in Just Math) Posted on 2008-12-20 (4 Comments) |

| analytical solution by Daniel (2008-12-20 22:40:55) |

Under Locksmith (in Logic) Posted on 2008-12-19 (10 Comments) |

| re(2): Any mistake? (possible spoiler) by Daniel (2008-12-20 03:30:44) |

Under Power x mod x (in Just Math) Posted on 2008-12-18 (5 Comments) |

| thoughts on solution by Daniel (2008-12-18 21:09:02) |

Under Space Junk (in Logic) Posted on 2008-11-29 (3 Comments) |

| re: i'm afraid there is a little glitch, but here it goes by Daniel (2008-12-06 02:11:22) |

| solution (no explanation ... yet) by Daniel (2008-11-30 01:37:44) |

Under Triangle Area (in Geometry) Posted on 2008-11-28 (11 Comments) |

| easier "cheat" answer by Daniel (2008-11-30 07:06:11) |

| computer aided solution by Daniel (2008-11-29 05:58:58) |

Under The farmer and the pig (in Calculus) Posted on 2008-11-13 (5 Comments) |

| re(2): Analytical Solution by Daniel (2008-11-19 09:27:55) |

| Analytical Solution by Daniel (2008-11-17 14:43:48) |

Under f(1998) (in Just Math) Posted on 2008-10-31 (4 Comments) |

| re: Similar solution by Daniel (2008-11-01 17:19:42) |

| analytical solution by Daniel (2008-10-31 14:36:05) |

Under Absolute Value And Real Constant (in Just Math) Posted on 2008-10-17 (3 Comments) |

| solution by Daniel (2008-10-17 13:45:18) |

Under Inversely Integrating An Inverse (in Calculus) Posted on 2008-10-15 (3 Comments) |

| re: Numerical answer by Daniel (2008-10-15 14:34:46) |

Under 9 balls, 10 straight lines (in General) Posted on 2008-10-12 (21 Comments) |

| re: Generic answer (Spoiler) by Daniel (2008-10-13 17:45:10) |

Under Going pandigital with P and Q (in Numbers) Posted on 2008-10-11 (2 Comments) |

| mathematia's answer by Daniel (2008-10-11 12:03:01) |

Under Maximum and cubic to a T (in Just Math) Posted on 2008-10-09 (6 Comments) |

| analytic solution by Daniel (2008-10-09 21:28:30) |

Under Who committed the murder? (in Logic) Posted on 2008-10-08 (5 Comments) |

| re: Solution by Daniel (2008-10-08 13:09:52) |

Under Half Perpendicular Times Two (in Geometry) Posted on 2008-10-06 (2 Comments) |

| proof :-) by Daniel (2008-10-06 18:01:34) |

Under Power 2 Sum Power 3 And 5 (in Just Math) Posted on 2008-10-04 (11 Comments) |

| almost proof ;-) by Daniel (2008-10-05 00:46:33) |

Under Sum Inverse LCMs (in Just Math) Posted on 2008-10-03 (7 Comments) |

| re: a stab (proof) by Daniel (2008-10-03 14:24:29) |

Under Sum of Squares (in Numbers) Posted on 2008-09-26 (6 Comments) |

| more generalized solution by Daniel (2008-09-27 11:55:04) |

| re(3): solution (spoiler) -- print SIGMA by Daniel (2008-09-26 19:27:47) |

| re: solution (spoiler) by Daniel (2008-09-26 12:39:31) |

| solution (spoiler) by Daniel (2008-09-26 12:35:54) |

Under Somewhere Near the Center (in Shapes) Posted on 2008-09-09 (3 Comments) |

| solution by parts (spoiler) by Daniel (2008-09-09 13:48:21) |

Under Some Reals Sum Two (in Just Math) Posted on 2008-09-01 (6 Comments) |

| re: solution checking by Daniel (2008-09-01 14:21:20) |

| solution (spoiler) by Daniel (2008-09-01 13:06:26) |

Under Prime suspect (in Calculus) Posted on 2008-08-31 (3 Comments) |

| re: solution (spoiler) by Daniel (2008-08-31 13:52:25) |

| solution (spoiler) by Daniel (2008-08-31 13:22:02) |

Under Catching your enemy (in Logic) Posted on 2008-08-25 (20 Comments) |

| re(2): interesting question by Daniel (2008-08-25 22:38:27) |

| interesting question by Daniel (2008-08-25 21:15:49) |

Under No repeated numbers (in Logic) Posted on 2008-08-20 (20 Comments) |

| optimal algarithm (no proof) by Daniel (2008-08-21 00:12:55) |

| possible solution (spoiler) by Daniel (2008-08-20 15:35:42) |

Under Subtract 1 from squared abbbb (in Just Math) Posted on 2008-08-16 (6 Comments) |

| Analytical Solution (spoiler) by Daniel (2008-08-16 15:29:36) |

Under All 10 Digits (in Numbers) Posted on 2008-08-12 (2 Comments) |

| computer solution (spoiler) by Daniel (2008-08-12 17:24:22) |

Under Some Reals Sum Integer (in Just Math) Posted on 2008-08-07 (3 Comments) |

| new approach (spoiler) by Daniel (2008-08-22 22:00:37) |

| Solution with link to proof (spoiler) by Daniel (2008-08-08 07:03:55) |

Under A digital root-perfect power problem (in Just Math) Posted on 2008-07-01 (7 Comments) |

| digit counts by Daniel (2008-12-29 06:55:56) |

Under Two English words (in Word Problems) Posted on 2008-06-27 (8 Comments) |

| solution by Daniel (2008-06-27 13:45:09) |

Under The horse and the grass field (in Calculus) Posted on 2008-06-15 (3 Comments) |

| solution by Daniel (2008-06-15 21:06:19) |

Under Evaluate this infinite product (in Calculus) Posted on 2008-06-05 (5 Comments) |

| Analytical solution by Daniel (2008-06-07 15:40:35) |

Under Empowering Inverse Products (in Calculus) Posted on 2008-06-02 (7 Comments) |

| quick solution by Daniel (2008-06-02 13:43:06) |

Under Continental Pole of Inaccessibility (in General) Posted on 2008-05-14 (17 Comments) |

| solution (maybe) by Daniel (2008-05-14 12:04:39) |

Under It's right under your nose (from time to time) (in Tricks) Posted on 2008-05-09 (7 Comments) |

| solution by Daniel (2008-05-09 11:18:30) |

Under Set of triplets (in Numbers) Posted on 2008-05-08 (7 Comments) |

| solution by Daniel (2008-05-08 22:11:51) |

Under Fund Raiser (in Numbers) Posted on 2008-05-01 (1 Comments) |

| computer solution by Daniel (2008-05-01 19:04:13) |

Under 1,000 (in Tricks) Posted on 2008-04-28 (18 Comments) |

| other idea by Daniel (2008-04-28 20:15:31) |

Under These Letters (in Sequences) Posted on 2008-02-07 (6 Comments) |

| solution spoiler by Daniel (2008-02-08 12:59:44) |

Under Equate To - 8, Get Roots (in Just Math) Posted on 2008-02-02 (6 Comments) |

| exact solution by Daniel (2008-02-03 12:11:50) |

Under Find The Value (in Calculus) Posted on 2008-01-28 (1 Comments) |

| solution by Daniel (2008-01-28 12:13:55) |

Under Primitive Pythagorean Triangles (in Geometry) Posted on 2008-01-26 (3 Comments) |

| re(2): solution by Daniel (2008-01-27 01:54:02) |

| solution by Daniel (2008-01-26 16:31:54) |

Under Circle And Intersection (in Geometry) Posted on 2008-01-25 (6 Comments) |

| solution (no proof of uniqueness) by Daniel (2008-01-25 11:43:33) |

Under Centroid And Summed Ratios (in Geometry) Posted on 2008-01-17 (1 Comments) |

| answer (no proof) by Daniel (2008-01-18 09:25:26) |

Under Sum the Points of Tangency (in Geometry) Posted on 2008-01-16 (1 Comments) |

| complete solution by Daniel (2008-01-18 02:26:11) |

Under Orders of Finish (in Numbers) Posted on 2008-01-12 (6 Comments) |

| re(2): simple computation algorithm by Daniel (2008-01-14 01:56:33) |

| simple computation algorithm by Daniel (2008-01-13 09:53:07) |

Under Exponential And Natural (in Calculus) Posted on 2008-01-08 (3 Comments) |

| full solution by Daniel (2008-01-09 09:44:22) |

Under Area of Pentagon (in Geometry) Posted on 2008-01-07 (4 Comments) |

| different approach by Daniel (2008-01-08 00:33:41) |

Under Exponentiate Negatively, Get Value (in Calculus) Posted on 2007-12-24 (6 Comments) |

| re(2): complete solution by Daniel (2007-12-25 10:52:58) |

| complete solution by Daniel (2007-12-25 02:14:37) |

Under Progressions with perfect squares! (in Just Math) Posted on 2007-12-20 (2 Comments) |

| complete solution by Daniel (2007-12-20 12:21:09) |

Under Getting Natural With Pi (in Calculus) Posted on 2007-11-27 (8 Comments) |

| analytical solution by Daniel (2007-11-27 13:51:46) |

Under Isosceles Triangle (in Geometry) Posted on 2007-11-21 (3 Comments) |

| computer aided solution by Daniel (2007-11-21 12:49:14) |

Under Getting To PC With A Circle (in Geometry) Posted on 2007-11-10 (9 Comments) |

| solution (different approach) by Daniel (2007-11-11 00:21:19) |

Under Sum Two Squares (in Numbers) Posted on 2007-11-02 (2 Comments) |

| re: Solution extra "trivial" solution by Daniel (2007-11-02 18:03:46) |

Under Color Coded Cubes (in Numbers) Posted on 2007-10-30 (4 Comments) |

| analytical solution by Daniel (2007-10-31 04:02:17) |

Under An Exponent Product And 98 Zeroes Puzzle (in Just Math) Posted on 2007-10-27 (12 Comments) |

| apologies by Daniel (2007-10-28 17:10:27) |

| new minimum found by Daniel (2007-10-28 06:02:34) |

| new minimum found by Daniel (2007-10-28 06:02:03) |

| new minimum found by Daniel (2007-10-28 06:02:02) |

| new minimum found by Daniel (2007-10-28 06:02:00) |

| new minimum found by Daniel (2007-10-28 06:01:59) |

| new minimum found by Daniel (2007-10-28 06:01:58) |

| new minimum found by Daniel (2007-10-28 06:01:57) |

Under Equate The Integrals, Get Constant (in Calculus) Posted on 2007-10-24 (3 Comments) |

| full solution by Daniel (2007-10-24 18:18:26) |

Under Linear and quadratic (in Calculus) Posted on 2007-10-23 (9 Comments) |

| re: No Subject by Daniel (2007-10-23 18:12:55) |

Under Acute triangle, Trigonometric function! (in Just Math) Posted on 2007-10-13 (9 Comments) |

| proof (maybe) by Daniel (2007-10-14 05:32:49) |

Under Out of gas. (in Tricks) Posted on 2007-09-22 (29 Comments) |

| re: solution by Daniel (2007-09-23 13:37:05) |

| solution by Daniel (2007-09-23 13:31:51) |

Under Getting Squared With 1 And 16 (in Just Math) Posted on 2007-09-01 (5 Comments) |

| some general solutions by Daniel (2007-09-02 05:37:51) |

Under Take Quadratic And Cubic, Get Sum And Product (in Just Math) Posted on 2007-08-24 (4 Comments) |

| re: Solution (little thing to add) by Daniel (2007-08-25 02:15:58) |

Under Missing Numbers Please (in Sequences) Posted on 2007-08-21 (7 Comments) |

| Solution (spoiler) by Daniel (2007-08-22 01:18:49) |

| hint by Daniel (2007-08-22 01:12:55) |

Under Sum Numbers, Get Even (Digits)? (in Just Math) Posted on 2007-08-15 (5 Comments) |

| solution by Daniel (2007-08-15 11:17:45) |

Under Prove the inequality (in Just Math) Posted on 2007-08-12 (6 Comments) |

| re(2): solution with proof (quick fix) by Daniel (2007-08-14 02:07:53) |

| solution with proof by Daniel (2007-08-13 01:57:05) |

Under Some Hardy Ramanujan variants (in Numbers) Posted on 2007-06-02 (2 Comments) |

| computer solution to first part by Daniel (2007-06-02 15:49:05) |

Under The Irrational Units Digit (in Numbers) Posted on 2007-05-21 (4 Comments) |

| formula (no proof) by Daniel (2007-05-21 14:47:39) |

Under A turtles' problem (in Tricks) Posted on 2007-05-17 (16 Comments) |

| a solution by Daniel (2007-05-17 14:00:55) |

Under Another 2007 Problem (in Numbers) Posted on 2007-02-19 (7 Comments) |

| re(2): a partial solution to B by Daniel (2007-02-20 03:33:11) |

| a partial solution to B by Daniel (2007-02-20 01:00:08) |

Under Arithmetic Progression Triangle (in Geometry) Posted on 2007-01-28 (5 Comments) |

| solution by Daniel (2007-01-30 14:06:08) |

Under Factors and Primes (in Numbers) Posted on 2007-01-24 (3 Comments) |

| a start by Daniel (2007-01-24 10:34:13) |

Under Divisibility (in Numbers) Posted on 2007-01-08 (6 Comments) |

| re: Some more thoughts by Daniel (2007-01-09 11:02:29) |

Under A 2007 Problem (in Just Math) Posted on 2007-01-04 (2 Comments) |

| solution comment by Daniel (2009-02-02 21:36:51) |

Under A Constant Puzzle (in Just Math) Posted on 2006-12-02 (4 Comments) |

| re(2): solutions (spoiler) by Daniel (2006-12-02 19:35:42) |

| solutions (spoiler) by Daniel (2006-12-02 12:38:25) |

Under Numbers of letters of numbers of letters of... (in Sequences) Posted on 2006-09-10 (15 Comments) |

| non convergence by Daniel (2006-09-10 11:04:27) |

| ordinal (other than english) by Daniel (2006-09-10 10:33:34) |

| cardinal english (spoiler) by Daniel (2006-09-10 10:09:54) |

Under Seven powers of seven (in Numbers) Posted on 2006-09-08 (3 Comments) |

| interesting findings by Daniel (2006-09-08 18:11:09) |

Under The gardener's woe is continuous (in Just Math) Posted on 2006-08-30 (5 Comments) |

| re: Solution(?) by Daniel (2006-08-30 22:00:42) |

Under A 2009 problem (in Just Math) Posted on 2006-08-27 (5 Comments) |

| further restrictions by Daniel (2006-08-27 22:14:38) |

| mathematica code by Daniel (2006-08-27 11:32:59) |

Under Five Circle Division (in Geometry) Posted on 2006-08-26 (15 Comments) |

| new question by Daniel (2006-08-26 14:41:44) |

Under Summing or Multiplying (in Numbers) Posted on 2006-08-21 (20 Comments) |

| re(2): my not so simple solution -- OOPS! by Daniel (2006-08-22 06:05:03) |

| my not so simple solution by Daniel (2006-08-21 19:33:03) |

Under A Real Number problem (in Just Math) Posted on 2006-08-16 (9 Comments) |

| my solution by Daniel (2006-08-16 16:21:36) |

Under What do I save? (in General) Posted on 2006-08-11 (6 Comments) |

| re: multiple perspectives by Daniel (2006-08-11 08:47:23) |

| multiple perspectives by Daniel (2006-08-11 08:41:04) |

Under A Multi-solution Puzzle (in Just Math) Posted on 2006-08-03 (3 Comments) |

| what mathematica has to say by Daniel (2006-08-03 18:03:12) |

Under Inequality (in Calculus) Posted on 2006-08-03 (3 Comments) |

| my solution by Daniel (2006-08-03 20:18:03) |

Under 3D Engineering problem (in Shapes) Posted on 2006-08-02 (16 Comments) |

| re(2): a thought on part 1 by Daniel (2006-08-04 05:50:10) |

| a thought on part 1 by Daniel (2006-08-03 02:35:59) |

Under Chess Strategy (in Logic) Posted on 2006-08-01 (7 Comments) |

| probablistic proof :-D by Daniel (2006-08-01 09:14:46) |

Under Tricky Ten Digit Number (in Numbers) Posted on 2006-07-31 (10 Comments) |

| computer solution (spoiler) by Daniel (2006-07-31 13:06:01) |

Under A deceiving riddle (in Riddles) Posted on 2006-07-31 (36 Comments) |

| re(2): a heated answer by Daniel (2006-08-02 20:22:14) |

| a heated answer by Daniel (2006-07-31 09:37:34) |

Under A Real Solution Puzzle (in Just Math) Posted on 2006-07-30 (5 Comments) |

| solution with proof :-) by Daniel (2006-07-30 11:36:17) |

Under Mine Detection (in Geometry) Posted on 2006-07-29 (7 Comments) |

| interesting discovery by Daniel (2006-07-29 18:15:43) |

| possible proof by Daniel (2006-07-29 17:37:56) |

| re(2): a shorter one :-) by Daniel (2006-07-29 12:44:29) |

| a shorter one :-) by Daniel (2006-07-29 11:14:08) |

| get things started :-) by Daniel (2006-07-29 10:56:56) |

Under A thing that nothing is (in Riddles) Posted on 2006-07-25 (19 Comments) |

| answer (spoiler) by Daniel (2006-07-25 08:56:15) |

Under Square-Crossed Power (in Just Math) Posted on 2006-07-23 (11 Comments) |

| re(2): possible analytical solution by Daniel (2006-07-27 19:08:19) |

| analytical solution (repost) by Daniel (2006-07-25 19:15:34) |

| re(3): possible analytical solution (final fix) by Daniel (2006-07-24 22:32:13) |

| re(2): possible analytical solution (to clarify) by Daniel (2006-07-24 09:17:38) |

| possible analytical solution by Daniel (2006-07-23 19:08:38) |

| computer solution (spoiler) by Daniel (2006-07-23 11:05:49) |

Under Two Digit Integers (in Just Math) Posted on 2006-07-14 (11 Comments) |

| Computer Solution by Daniel (2006-07-14 13:04:05) |

Under Time to run out water (in Science) Posted on 2006-07-13 (11 Comments) |

| re(2): solution (maybe) (my bad) by Daniel (2006-07-14 06:03:37) |

| solution (maybe) by Daniel (2006-07-14 01:41:54) |

Under tugged in all directions (in Riddles) Posted on 2006-07-12 (6 Comments) |

| solution spoiler by Daniel (2006-07-12 19:02:12) |

Under Multiplication Table (in Numbers) Posted on 2006-07-07 (12 Comments) |

| another solution by Daniel (2006-07-07 16:32:07) |

Under Old Mother Twitchett (in Famous Riddles) Posted on 2006-07-06 (18 Comments) |

| answer (spoiler) by Daniel (2006-07-06 08:23:39) |

Under Arrange The Disks (in General) Posted on 2006-07-04 (14 Comments) |

| solution by Daniel (2006-07-04 11:51:22) |

Under WWW (in Just Math) Posted on 2006-07-04 (6 Comments) |

| solution by Daniel (2006-07-04 09:36:06) |

Under A Clock Puzzle (in General) Posted on 2006-07-01 (11 Comments) |

| hint by Daniel (2006-07-01 08:26:50) |

| solution Spoiler by Daniel (2006-07-01 08:25:49) |

Under A Digital Root Problem (in Just Math) Posted on 2006-06-29 (10 Comments) |

| re: Difficulty by Daniel (2006-06-29 22:53:04) |

| Solution Spoiler by Daniel (2006-06-29 11:48:24) |

| Hint by Daniel (2006-06-29 11:43:35) |

Under Further Arithmetic Integers (in Numbers) Posted on 2006-06-27 (10 Comments) |

| genearl problem :-D by Daniel (2006-06-28 22:53:13) |

| mathematica solution (spoiler) by Daniel (2006-06-28 06:03:32) |

Under 8 = 4 + 4 (in Numbers) Posted on 2004-08-26 (11 Comments) |

| what mathematica has to say by Daniel (2006-07-30 22:08:40) |

Under A Keg of Wine (in Just Math) Posted on 2004-07-14 (26 Comments) |

| general exact solution by Daniel (2006-07-09 15:22:58) |

Under Power - ful (in Just Math) Posted on 2003-12-31 (11 Comments) |

| just how big is it by Daniel (2006-07-03 02:13:36) |

Under Marbles Bonanza (in Paradoxes) Posted on 2003-09-08 (83 Comments) |

| chasing infinity theory by Daniel (2006-07-03 20:08:52) |

Under No Room at the Inn (in Liars and Knights) Posted on 2003-06-25 (18 Comments) |

| alternative solution by Daniel (2006-07-31 04:40:49) |

Under Location X (in Geometry) Posted on 2003-05-05 (5 Comments) |

| where's the sign? by Daniel (2008-09-22 01:39:40) |

Under Cleopatra and Marc Anthony (in Riddles) Posted on 2003-04-22 (27 Comments) |

| re: Sounds like a retarded 3rd grader made this one by Daniel (2006-08-02 20:18:58) |

Under Playing With Numbers (in Sequences) Posted on 2003-04-16 (6 Comments) |

| mathematica code (spoiler) by Daniel (2006-06-27 10:01:10) |

Under Important Day (in Riddles) Posted on 2002-12-29 (17 Comments) |

| STOP ALL THE VOTES!!!!! PLEASE READ!!! by Daniel (2006-06-29 08:53:29) |

| another possibility by Daniel (2006-06-29 08:31:19) |

Under Make the most of these digits (in Numbers) Posted on 2002-06-06 (48 Comments) |

| re: The challenge taken up.... by Daniel (2008-09-01 16:28:09) |