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Difficulty: 3 of 5Under It is infinite if it isn't? (in Paradoxes)
Posted on 2005-04-12 (35 Comments)
No paradox by David Shin (2005-04-13 15:56:49)
re: Possible paradox by David Shin (2005-04-12 21:06:55)
Difficulty: 2 of 5Under Only One Hand (in Games)
Posted on 2005-04-11 (31 Comments)
re: No Subject by David Shin (2005-04-12 04:25:11)
Hints/Tips Comments by David Shin (2005-04-11 18:31:22)
Difficulty: 4 of 5Under Cosines everywhere (in Geometry)
Posted on 2005-03-21 (6 Comments)
Solution Solution by David Shin (2005-03-21 19:13:57)
Difficulty: 5 of 5Under Sastry's Evil Bisectors (in Geometry)
Posted on 2005-03-04 (10 Comments)
Thoughts by David Shin (2005-03-05 06:53:25)
Difficulty: 3 of 5Under Curiously Cavalier Chess Conclusion (in Games)
Posted on 2005-02-25 (6 Comments)
re: Solution, mate in 5 th move by David Shin (2005-02-26 09:03:26)
Difficulty: 4 of 5Under Sums of Squares (in Numbers)
Posted on 2005-02-21 (8 Comments)
re: solution by David Shin (2005-03-01 19:14:31)
re: meow by David Shin (2005-02-22 16:00:26)
Difficulty: 5 of 5Under Figure Eights (in General)
Posted on 2005-02-15 (34 Comments)
re: solution - the number of curves must be countable(?) by David Shin (2005-02-23 07:19:29)
re: A thought by David Shin (2005-02-22 03:17:33)
re(10): I think it's... - Elaboration by David Shin (2005-02-19 15:28:11)
re(8): I think it's... - Elaboration by David Shin (2005-02-19 04:36:45)
re(6): I think it's... - Elaboration by David Shin (2005-02-18 22:40:33)
re(5): I think it's... by David Shin (2005-02-18 00:14:05)
re(3): I think it's... by David Shin (2005-02-17 19:31:39)
re(3): still thinking by David Shin (2005-02-16 06:49:44)
re: I think it's... by David Shin (2005-02-16 01:08:36)
Hints/Tips Tips by David Shin (2005-02-15 19:59:16)
Difficulty: 4 of 5Under Even and odd powers (in Just Math)
Posted on 2005-02-09 (22 Comments)
re(4): Uncle! by David Shin (2005-03-05 17:16:42)
re(2): Uncle! by David Shin (2005-03-03 19:27:37)
Hints/Tips Not just yet by David Shin (2005-02-28 16:37:36)
re: No Subject by David Shin (2005-02-26 09:08:31)
Solution Solution by David Shin (2005-02-10 00:01:39)
Difficulty: 4 of 5Under God and the Devil (in Games)
Posted on 2005-02-08 (62 Comments)
re(2): Gambling and Charity by David Shin (2005-02-16 20:56:44)
Gambling and Charity by David Shin (2005-02-16 16:47:03)
re(3): Clarification of infinite sequence by David Shin (2005-02-10 04:17:57)
re: Spiral sequence by David Shin (2005-02-09 14:19:48)
re: Clarification of infinite sequence by David Shin (2005-02-09 06:33:21)
re(5): Solution attempt - Jack was right by David Shin (2005-02-09 02:21:42)
re(2): Regarding randomness by David Shin (2005-02-09 02:20:45)
Hints/Tips Regarding randomness by David Shin (2005-02-09 00:33:24)
re(3): boiling it down - Not so simple by David Shin (2005-02-08 22:40:54)
re: boiling it down - Not so simple by David Shin (2005-02-08 22:19:13)
Difficulty: 4 of 5Under Connect The Dots (in Geometry)
Posted on 2005-02-06 (14 Comments)
re: Smart guys Help by David Shin (2005-02-08 19:57:26)
re(3): Detailed Solution by David Shin (2005-02-08 15:32:10)
Difficulty: 3 of 5Under Bisect The Segment (in Geometry)
Posted on 2005-01-29 (8 Comments)
re(2): solution by David Shin (2005-01-31 07:08:36)
Difficulty: 5 of 5Under One Word, Seven Times (in Word Problems)
Posted on 2005-01-27 (14 Comments)
"Satify the grammarians" means "satisfy the grammarians" by David Shin (2005-01-27 20:38:39)
re: A multitude of answers? by David Shin (2005-01-27 20:03:07)
Difficulty: 2 of 5Under Nowhere to Hide II (in Games)
Posted on 2005-01-26 (10 Comments)
Solution Complete Solution by David Shin (2005-01-27 07:50:03)
re(2): Upper Bound by David Shin (2005-01-26 19:57:55)
Some Thoughts Even Better by David Shin (2005-01-26 19:56:15)
Some Thoughts Better Upper Bound by David Shin (2005-01-26 19:50:52)
Some Thoughts Upper Bound by David Shin (2005-01-26 19:46:38)
Difficulty: 1 of 5Under A rainbow of haves and have-nots (in Word Problems)
Posted on 2005-01-26 (14 Comments)
Another Color by David Shin (2005-01-26 17:15:52)
Difficulty: 4 of 5Under Voting power distribution (in General)
Posted on 2005-01-24 (13 Comments)
re: Clarification by David Shin (2005-01-24 22:24:47)
Clarification by David Shin (2005-01-24 22:12:36)
Difficulty: 3 of 5Under I See No Ships (in Geometry)
Posted on 2005-01-23 (15 Comments)
Solution Solution by David Shin (2005-01-23 16:18:00)
Difficulty: 2 of 5Under Hungry Ant (in Tricks)
Posted on 2005-01-21 (14 Comments)
re: Unfolding the room by David Shin (2005-01-21 15:07:39)
Solution Solution by David Shin (2005-01-21 14:50:31)
Difficulty: 3 of 5Under Broken Calculator (in Just Math)
Posted on 2005-01-20 (14 Comments)
re: More Clarifications by David Shin (2005-01-20 22:44:40)
Clarifications by David Shin (2005-01-20 21:31:09)
Difficulty: 3 of 5Under Most Letters 2 (in Word Problems)
Posted on 2005-01-20 (15 Comments)
re(2): 6 letter reverse solution by David Shin (2005-01-21 14:59:50)
re: 5 OUT OF 5 by David Shin (2005-01-20 22:47:23)
Solution 6 letter reverse solution by David Shin (2005-01-20 16:29:33)
Difficulty: 3 of 5Under Sphere Pyramid (in Geometry)
Posted on 2005-01-19 (4 Comments)
re(2): Solution by David Shin (2005-01-19 21:14:16)
Solution Solution by David Shin (2005-01-19 18:31:31)
Difficulty: 3 of 5Under Homophonic Equality (in Word Problems)
Posted on 2005-01-18 (8 Comments)
Still need to prove v=1... by David Shin (2005-01-25 19:27:02)
Homonym verification by David Shin (2005-01-18 21:38:24)
Difficulty: 3 of 5Under All integers (in Geometry)
Posted on 2005-01-17 (14 Comments)
re: Solution, by hand by David Shin (2005-01-18 17:33:07)
re(2): Solution by David Shin (2005-01-18 15:06:25)
re: Solution (Proof by Hand) by David Shin (2005-01-17 21:22:30)
Another failed attempt by David Shin (2005-01-17 18:04:04)
Difficulty: 4 of 5Under Who will win? (in Games)
Posted on 2005-01-10 (9 Comments)
More thorough solution by David Shin (2005-01-10 19:50:27)
re(4): Solution by David Shin (2005-01-10 19:40:00)
re(2): Solution by David Shin (2005-01-10 18:52:43)
Solution Solution by David Shin (2005-01-10 17:22:13)
Difficulty: 3 of 5Under Box game (in Games)
Posted on 2005-01-04 (31 Comments)
re(2): ...and going... by David Shin (2005-02-09 15:13:20)
Proof of optimality of 15 for 5x5 by David Shin (2005-01-15 18:24:57)
Thoughts on the maximum by David Shin (2005-01-15 17:43:33)
Difficulty: 4 of 5Under Remainder of One (in Just Math)
Posted on 2004-12-29 (13 Comments)
re(4): Yet another Erdos theorem by David Shin (2005-01-26 04:48:51)
re(2): Yet another Erdos theorem by David Shin (2005-01-25 21:33:38)
re: answer? by David Shin (2004-12-29 21:35:15)
Difficulty: 3 of 5Under Math Class (in Numbers)
Posted on 2004-12-23 (9 Comments)
re(2): Solution by David Shin (2004-12-31 17:58:19)
Difficulty: 3 of 5Under Rational Result? Ridiculous! (in Numbers)
Posted on 2004-12-20 (19 Comments)
re(5): I may have a solution, but... by David Shin (2004-12-20 19:03:38)
Difficulty: 3 of 5Under decimal sequence (in Sequences)
Posted on 2004-11-30 (6 Comments)
Solution Solution by David Shin (2004-11-30 18:09:46)
Difficulty: 4 of 5Under Kool Numbers (in Numbers)
Posted on 2004-11-15 (10 Comments)
Hints/Tips Third part by David Shin (2004-11-15 17:36:28)
Difficulty: 3 of 5Under Four Way Smarties (in General)
Posted on 2004-11-05 (22 Comments)
re(2): Minor difference in interpretation + Computer solution by David Shin (2004-11-06 17:37:44)
Solution Minor difference in interpretation + Computer solution by David Shin (2004-11-05 14:38:07)
Difficulty: 4 of 5Under Exponential Difficulties (in Just Math)
Posted on 2004-10-30 (6 Comments)
Solution Solution by David Shin (2004-10-30 17:32:55)
Difficulty: 3 of 5Under Two circles (in Geometry)
Posted on 2004-10-21 (11 Comments)
Solution Three circles case by David Shin (2004-10-21 17:25:21)
Solution Two circles case by David Shin (2004-10-21 17:08:16)
Difficulty: 3 of 5Under What did Black play? (in Games)
Posted on 2004-10-18 (6 Comments)
re: Well..(a little more formally) by David Shin (2004-10-18 20:23:09)
Difficulty: 2 of 5Under The Sum of the Parts Is Less Than And More Than the Parts (in Numbers)
Posted on 2004-10-15 (11 Comments)
re: Counterexamples by David Shin (2004-10-15 20:13:41)
Solution Solution by David Shin (2004-10-15 17:07:22)
Difficulty: 3 of 5Under Ten Words (4) (in Word Problems)
Posted on 2004-10-14 (11 Comments)
Solution Computer solution by David Shin (2004-10-14 18:47:40)
Difficulty: 4 of 5Under Flipping Coins (in Probability)
Posted on 2004-10-13 (26 Comments)
re: Solution to First Question (high chance of error) by David Shin (2004-10-13 17:30:08)
Solution Solution to First Question (high chance of error) by David Shin (2004-10-13 17:26:05)
Difficulty: 2 of 5Under Curious Cubic Calculation? (in Numbers)
Posted on 2004-10-13 (14 Comments)
re: Solution by David Shin (2004-10-13 13:33:30)
Solution Solution by David Shin (2004-10-13 12:57:31)
Difficulty: 3 of 5Under Five Sentences (in Logic)
Posted on 2004-10-12 (33 Comments)
Computer solution by David Shin (2004-10-12 18:32:17)
Difficulty: 2 of 5Under A Curious Cone (in Geometry)
Posted on 2004-10-11 (12 Comments)
re: Seriously, though..... by David Shin (2004-10-11 15:33:26)
Difficulty: 2 of 5Under Omikron, Rho, Sigma (in Sequences)
Posted on 2004-10-09 (8 Comments)
Solution Solution by David Shin (2004-10-09 18:05:53)
Difficulty: 3 of 5Under Candy Box (in Numbers)
Posted on 2004-10-08 (17 Comments)
re: About 9 pieces by David Shin (2004-10-08 17:05:14)
re(2): Solution by David Shin (2004-10-08 15:54:49)
Solution Solution by David Shin (2004-10-08 14:01:26)
Difficulty: 3 of 5Under Similar Sequence Sum! (in Just Math)
Posted on 2004-10-07 (6 Comments)
Solution Solution by David Shin (2004-10-07 12:47:41)
Difficulty: 3 of 5Under Isn't It Integer? (in Just Math)
Posted on 2004-10-06 (3 Comments)
re: Solution (Correction) by David Shin (2004-10-06 16:34:28)
Solution Solution by David Shin (2004-10-06 16:21:38)
Difficulty: 3 of 5Under A New Solid (in Shapes)
Posted on 2004-10-05 (19 Comments)
re: Perhaps simpler calculations by David Shin (2004-10-05 20:36:55)
Solution Solution by David Shin (2004-10-05 12:22:56)
Difficulty: 1 of 5Under Interesting Sequence (3) (in Sequences)
Posted on 2004-10-04 (9 Comments)
re: Any Easier way ? by David Shin (2004-10-04 11:04:40)
Difficulty: 5 of 5Under Cube the Cube (in Shapes)
Posted on 2004-10-02 (12 Comments)
Solution Solution by David Shin (2004-10-08 16:49:33)
Difficulty: 3 of 5Under Is It Infinitely Increasing? (in Just Math)
Posted on 2004-09-30 (13 Comments)
re: Solution by Googling by David Shin (2004-10-13 13:07:04)
re(3): interesting by David Shin (2004-10-01 10:35:34)
Difficulty: 2 of 5Under 3x5 = 5x3 (in Shapes)
Posted on 2004-09-30 (4 Comments)
Solution Solution by David Shin (2004-09-30 08:46:48)
Difficulty: 2 of 5Under At the Olympic Games (6) (in Logic)
Posted on 2004-09-27 (47 Comments)
Solution Solution by David Shin (2004-09-27 10:22:39)
Difficulty: 5 of 5Under FIGURE it out (2) (in General)
Posted on 2004-09-25 (14 Comments)
re(4): solution: much opportunity for error-- correction by David Shin (2004-09-25 17:48:56)
re(2): solution: much opportunity for error-- correction by David Shin (2004-09-25 17:25:05)
A couple disagreements by David Shin (2004-09-25 17:07:25)
Difficulty: 3 of 5Under Rare Rotative Relationship! (in Numbers)
Posted on 2004-09-23 (13 Comments)
re: Solutions with interpretations by David Shin (2004-09-23 19:06:04)
Solution Solution by David Shin (2004-09-23 13:07:08)
Difficulty: 3 of 5Under More Archery Practice (in Numbers)
Posted on 2004-09-21 (14 Comments)
re(5): Intuitive Representation IMHO by David Shin (2004-09-24 17:01:15)
re(3): Intuitive Representation IMHO (spoilers) by David Shin (2004-09-24 10:05:37)
re: Intuitive Representation IMHO by David Shin (2004-09-23 22:51:37)
Clearer Explanation by David Shin (2004-09-21 18:13:13)
re: Answer by David Shin (2004-09-21 13:21:57)
Solution Solution by David Shin (2004-09-21 13:15:46)
Difficulty: 2 of 5Under Interesting Sequence (in Sequences)
Posted on 2004-09-21 (11 Comments)
Hints/Tips re: Common theme...? by David Shin (2004-09-21 08:46:45)
Difficulty: 4 of 5Under Get one half by squaring (in Just Math)
Posted on 2004-09-20 (31 Comments)
re: 9 terms (or beating dead horse) by David Shin (2004-09-22 21:11:35)
Continue Beating the Horse... by David Shin (2004-09-22 21:05:41)
re: An eleven terms solution by David Shin (2004-09-21 21:18:11)
re: infinite solution by David Shin (2004-09-21 01:25:19)
Some Thoughts A Conjecture by David Shin (2004-09-20 23:40:38)
re(2): Solution by David Shin (2004-09-20 22:51:37)
re: No Subject by David Shin (2004-09-20 18:44:26)
Difficulty: 3 of 5Under Queen Square (in General)
Posted on 2004-09-20 (6 Comments)
Clarification Requested by David Shin (2004-09-20 08:16:43)
Difficulty: 2 of 5Under Highest Number (in Just Math)
Posted on 2004-09-18 (19 Comments)
Juggler is right by David Shin (2004-09-18 15:26:13)
re(3): How to do! by David Shin (2004-09-18 15:18:02)
re: How to do! by David Shin (2004-09-18 13:56:45)
Minimum value by David Shin (2004-09-18 13:10:40)
Solution Computer Solution by David Shin (2004-09-18 12:47:45)
Difficulty: 3 of 5Under A pool rack filled with balls (in Geometry)
Posted on 2004-09-17 (25 Comments)
re(4): Solution by David Shin (2004-09-24 10:09:57)
re(2): Solution by David Shin (2004-09-24 01:41:32)
re: More Thoughts by David Shin (2004-09-17 17:26:17)
Difficulty: 2 of 5Under Hidden Elements (in Science)
Posted on 2004-09-17 (15 Comments)
re(4): mendel - ayev by David Shin (2004-09-18 13:16:06)
Difficulty: 3 of 5Under Lines of Reasoning (in General)
Posted on 2004-09-16 (20 Comments)
Solution Possible Answer? by David Shin (2004-09-16 21:28:59)
Difficulty: 3 of 5Under Noughts and Crosses (in Games)
Posted on 2004-09-16 (6 Comments)
re(2): Solution by David Shin (2004-09-16 09:03:27)
Solution Solution by David Shin (2004-09-16 08:35:50)
Difficulty: 2 of 5Under Third Squared (in Shapes)
Posted on 2004-09-15 (7 Comments)
re: MAYBE? by David Shin (2004-09-15 16:33:10)
Solution Solution by David Shin (2004-09-15 16:05:26)
Difficulty: 1 of 5Under Mix 'em up! (in Word Problems)
Posted on 2004-09-15 (9 Comments)
Solution Second One by David Shin (2004-09-15 10:29:55)
Solution Solutions to first and third by David Shin (2004-09-15 09:25:50)
Difficulty: 5 of 5Under Partitioning Space (in Geometry)
Posted on 2004-09-13 (13 Comments)
Solution Part II Solution by David Shin (2004-09-15 00:24:00)
Solution Part I Solution by David Shin (2004-09-15 00:18:00)
re(2): Reason, don't guess by David Shin (2004-09-14 17:24:40)
Reason, don't guess by David Shin (2004-09-14 16:47:37)
Some Thoughts Some ideas... by David Shin (2004-09-14 08:52:02)
Difficulty: 3 of 5Under Hawks and Doves (in Probability)
Posted on 2004-09-13 (22 Comments)
re(2): To Make Oskar's Solution Work... by David Shin (2004-09-13 16:18:19)
Solution To Make Oskar's Solution Work... by David Shin (2004-09-13 10:57:15)
Some Thoughts re: Final part by David Shin (2004-09-13 10:29:08)
Question Clarification Requested by David Shin (2004-09-13 08:59:45)
Difficulty: 1 of 5Under Gonna party like it's 1999 (in Just Math)
Posted on 2004-09-12 (7 Comments)
Solution re: Solution by David Shin (2004-09-12 13:51:53)
Solution Solution by David Shin (2004-09-12 09:31:14)
Difficulty: 2 of 5Under Harder Russian Roulette (in Probability)
Posted on 2004-09-11 (20 Comments)
Solution Cylinders Are Round by David Shin (2004-09-11 15:26:28)
Difficulty: 4 of 5Under Circle, Circle, Triangle, Circle! (in Geometry)
Posted on 2004-09-08 (10 Comments)
re: Tan by David Shin (2004-09-25 03:43:52)
Error in Solution by David Shin (2004-09-11 15:55:51)
Solution Solution by David Shin (2004-09-09 16:09:12)
Difficulty: 2 of 5Under Missing digits (in Just Math)
Posted on 2004-09-04 (9 Comments)
Solution Solution by David Shin (2004-09-04 09:47:58)
Difficulty: 4 of 5Under Interesting Function (2) (in Just Math)
Posted on 2004-09-03 (6 Comments)
Solution Solution by David Shin (2004-09-03 13:15:47)
Difficulty: 4 of 5Under Nowhere to Hide (in Games)
Posted on 2004-08-31 (7 Comments)
A little disappointed... by David Shin (2004-09-18 11:12:49)
Difficulty: 4 of 5Under Provably unprovable? (in Paradoxes)
Posted on 2004-08-22 (36 Comments)
Posted Solution is Bogus by David Shin (2004-10-15 20:26:54)
re: No problem by David Shin (2004-10-15 20:17:45)
Difficulty: 3 of 5Under A circle through seven points (in Geometry)
Posted on 2004-08-19 (1 Comments)
Solution Solution by David Shin (2004-08-19 14:12:44)
Difficulty: 3 of 5Under Twelve dots (and more!) (in Shapes)
Posted on 2004-08-17 (5 Comments)
Solution formatting error in solution by David Shin (2004-08-17 13:35:31)
Solution solution to 3x4 by David Shin (2004-08-17 13:27:06)
Difficulty: 3 of 5Under How Many Triangles... (in Geometry)
Posted on 2004-08-15 (8 Comments)
Solution solution by David Shin (2004-08-15 14:20:21)
Difficulty: 4 of 5Under Points On A Circle (in Geometry)
Posted on 2004-08-14 (17 Comments)
re: com by David Shin (2005-01-24 20:54:15)
Some Thoughts Impossibly Hard... by David Shin (2004-09-26 01:36:10)
Difficulty: 3 of 5Under Can Or Cannot (in Paradoxes)
Posted on 2003-04-30 (109 Comments)
An Analogy... by David Shin (2004-10-12 04:48:13)
Difficulty: 2 of 5Under Safety from the queen (in Games)
Posted on 2002-12-12 (16 Comments)
Solution Another solution by David Shin (2004-09-27 00:32:46)
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