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wu :: forums    riddles    hard (Moderators: towr, Icarus, Grimbal, SMQ, william wu, Eigenray, ThudnBlunder) Pages: 1 ... 7 8 9 10 11  ...  27 Start new topic    Subject Started by Replies Views Last post Calendar Cubes I really not so hard onlyme722 1 3208 Feb 29th, 2008, 7:41pm by Icarus Industrial/Distributed Computing « Pages 1 2 » k2xl 25 2861 Feb 29th, 2008, 1:26pm by Eigenray Sheila & He-man- Twin Riddle RiddleGenius 12 6076 Feb 25th, 2008, 7:35am by RiddleGenius concatenation equation Benny 3 754 Feb 24th, 2008, 11:35am by Benny Coin weigh game uzo 3 865 Feb 24th, 2008, 11:01am by towr The 100 cell Jail Riddle RiddleGenius 4 2941 Feb 23rd, 2008, 1:12pm by RiddleGenius Moved: Fermat numbers Benny 0 660 Feb 18th, 2008, 2:26pm by Benny Moved: a very hard riddle,for extra credit vagueriddle 0 2669 Feb 14th, 2008, 3:27am by vagueriddle Sink the sub Ralph 3 1040 Feb 12th, 2008, 11:16pm by temporary question about decision theory Benny 2 1219 Feb 5th, 2008, 2:55pm by Benny Superbowl problem Benny 4 2238 Feb 3rd, 2008, 11:36pm by Benny Cutting a cube Benny 4 3611 Feb 1st, 2008, 6:41am by towr A difficult sangaku alexb 0 846 Jan 29th, 2008, 10:06pm by alexb Variation of red eyed monks inexorable 10 2484 Jan 29th, 2008, 12:04am by Hippo A new riddle? a barge in an L-shaped canal Serge Batalov 10 2183 Jan 27th, 2008, 1:33am by Bojan_Basic Infinite Checkerboard « Pages 1 2 » Eric Yeh 36 8661 Jan 26th, 2008, 2:21am by Bojan_Basic Go temporary 9 1286 Jan 25th, 2008, 8:39pm by Icarus 3 Spiders and a Psychic Fly « Pages 1 2 » william wu 37 8794 Jan 25th, 2008, 5:58pm by temporary Another Perpetual Motion Machine Icarus 0 1161 Jan 23rd, 2008, 7:34pm by Icarus Nothingness « Pages 1 2 3 » sofeffi 57 7165 Jan 23rd, 2008, 5:54pm by temporary Circular Jail Cell with 100 cells Jesse 8 9959 Jan 22nd, 2008, 9:44pm by temporary Re: .JPG riddle lantybunning 5 1086 Jan 21st, 2008, 6:32am by SMQ 100 people, 100 numbers « Pages 1 2 » brainer 37 6632 Jan 20th, 2008, 8:53am by Hippo Counting Pythagorean Quadruples JocK 7 1709 Jan 8th, 2008, 12:22am by Eigenray Ghost ships « Pages 1 2 » Paul Hsieh 29 9065 Dec 17th, 2007, 4:08am by JiNbOtAk Non-Intersecting Matching william wu 1 1128 Dec 12th, 2007, 4:06pm by Aryabhatta MESSAGE RECONSTRUCTION kapiwu 2 1873 Dec 10th, 2007, 1:51am by towr Moved: Neat problem from the Maryland Math Olympiad amichail 0 1401 Dec 9th, 2007, 10:30am by towr Designing a Pi Resistance Barukh 17 3665 Dec 5th, 2007, 1:41pm by SMQ Save the TSA!  Solve this puzzle! ecoist 10 4155 Nov 20th, 2007, 4:04am by Random Lack of Squiggily Lines Pages: 1 ... 7 8 9 10 11  ...  27 Start new topic  Normal Topic Hot Topic (More than 15 Replies) Very Hot Topic (More than 25 Replies) Locked Topic Sticky Topic Sticky Locked Topic Forum Jump: ----------------------------- riddles -----------------------------  - easy   - medium => hard   - what am i   - what happened   - microsoft   - cs   - putnam exam (pure math)   - suggestions, help, and FAQ   - general problem-solving / chatting / whatever ----------------------------- general -----------------------------  - guestbook   - truth   - complex analysis   - wanted   - psychology   - chinese

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