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wu :: forums    riddles    hard (Moderators: Grimbal, william wu, SMQ, Eigenray, ThudnBlunder, towr, Icarus) Pages: 1 ... 4 5 6 7 8  ...  27 Start new topic    Subject Started by Replies Views Last post jumping frog kyle1080 14 2046 Oct 20th, 2009, 4:16pm by Obob Moved: Math riddle? x2862 0 1571 Jul 19th, 2009, 2:09pm by towr 12 balls - variation redPEPPER 24 17902 Jul 8th, 2009, 11:23pm by Victor_YS_Cheung Pseudo-tessellation ecks 7 2635 Jun 16th, 2009, 2:46pm by Aryabhatta log n and sigma 1/n kaushiks.nitt 2 3236 Jun 13th, 2009, 1:31pm by Eigenray Moved: Prime number problem Benny 0 1398 Jun 3rd, 2009, 1:19pm by SMQ number Theory problem LeoYard 6 1558 May 25th, 2009, 12:00pm by rmsgrey Moved: Really Hard Precalculus Project warriors837 0 977 May 19th, 2009, 8:40am by towr Moved: k-sided die rolled n times jarls 0 1340 May 1st, 2009, 1:20am by jarls Moved: Tough question Polymath101 0 832 Apr 27th, 2009, 12:41am by Grimbal Anybody good with sequences? Polymath101 0 928 Apr 26th, 2009, 8:10pm by Polymath101 Four-leg table on smooth terrain brac37 4 2239 Apr 24th, 2009, 11:35am by brac37 Nonverbal IQ Test (Other Half of Ultra Test) Polymath101 8 5957 Apr 20th, 2009, 7:20pm by Polymath101 Online Verbal IQ Test ThudnBlunder 22 9712 Apr 15th, 2009, 7:43pm by Polymath101 Hard: Criminal Cupbearers « Pages 1 2 3 4 » Cody Batt 88 22595 Apr 10th, 2009, 2:03pm by towr Fork In the Road II Macduff472y 12 4653 Apr 2nd, 2009, 4:37pm by rmsgrey A question from the Russian MO wonderful 12 2641 Apr 2nd, 2009, 6:04am by Immanuel_Bonfils Forcing a test « Pages 1 2 » Leo Broukhis 29 5281 Mar 12th, 2009, 6:44pm by Leo Broukhis 100 prisoners & a light bulb « Pages 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 » Captain Caveman 624 166736 Mar 10th, 2009, 6:58am by SMQ Complicated Hidden Message nicole 6 5809 Jan 28th, 2009, 7:04am by towr High buildings and street vendors solution >=P « Pages 1 2 » Luis Edgardo Argote Bolio 25 9172 Jan 27th, 2009, 1:43pm by Grimbal A-sequences Barukh 14 2383 Jan 10th, 2009, 1:11am by pex Single-file hat excecution - Variation dburton 4 1126 Jan 2nd, 2009, 4:51am by Hippo Greedy Egalitarian Pirates hawkxor 24 2840 Dec 30th, 2008, 1:32pm by Hippo Rotating Hexagon balakrishnan 16 7547 Dec 29th, 2008, 10:17am by balakrishnan Two-face bomb stardust496 1 2324 Dec 29th, 2008, 1:48am by towr range of function cool_joh 2 947 Dec 18th, 2008, 5:44am by cool_joh infectious disease tomas 19 1832 Dec 9th, 2008, 3:59am by River Phoenix Language Proficiency Verification « Pages 1 2 » william wu 46 8087 Dec 7th, 2008, 12:54pm by Random Lack of Squiggily Lines Coin weighting: 8 coins with 2 defected coins wonderful 5 3220 Dec 2nd, 2008, 7:35am by rmsgrey Pages: 1 ... 4 5 6 7 8  ...  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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