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wu :: forums    riddles    hard (Moderators: william wu, Eigenray, Grimbal, SMQ, towr, Icarus, ThudanBlunder) Pages: 1 2 3  ...  24 Start new topic    Subject Started by Replies Views Last post 100 prisoners & a lightbulb SMQ 3 1943 Oct 5th, 2009, 8:27am by towr Unsolved Problems in the Hard Forum « Pages 1 2 » Icarus 34 8860 Aug 15th, 2007, 10:55am by rmsgrey POST WHAT AM I PUZZLES TO WHAT AM I FORUM william wu 0 5305 Jan 30th, 2003, 12:12am by william wu ANSWERS VS. PROBLEM-SOLVING PROCESSES william wu 17 6018 May 10th, 2007, 8:33am by rmsgrey How many queens? Icarus 14 1664 Nov 17th, 2003, 7:08pm by SWF Moved: Impossible Question diemert 0 18 Nov 16th, 2009, 4:36am by diemert island dilemma Ankitt_sk 1 79 Oct 28th, 2009, 12:40am by towr jumping frog kyle1080 14 518 Oct 20th, 2009, 4:16pm by Obob Pop Quiz Riddle « Pages 1 2 3 4 5 6 7 8 9 10 » Jackass 235 14198 Oct 20th, 2009, 7:31am by Mickey1 Solution to CRIMINAL CUPBEARERS « Pages 1 2 » dayak 26 4467 Oct 9th, 2009, 1:06pm by RyanJJohn Two-Person Traversal of a Sequence of Cities S4T4N 5 353 Sep 28th, 2009, 12:04pm by R Moved: Math riddle? x2862 0 148 Jul 19th, 2009, 2:09pm by towr 12 balls - variation redPEPPER 24 4547 Jul 8th, 2009, 11:23pm by Victor_YS_Cheung Pseudo-tessellation ecks 7 296 Jun 16th, 2009, 2:46pm by Aryabhatta log n and sigma 1/n kaushiks.nitt 2 273 Jun 13th, 2009, 1:31pm by Eigenray Moved: Prime number problem BenVitale 0 201 Jun 3rd, 2009, 1:19pm by SMQ 100 prisoners & a lightbulb: Technical SMQ 8 1642 May 28th, 2009, 3:29pm by william wu number Theory problem LeoYard 6 694 May 25th, 2009, 12:00pm by rmsgrey Moved: Really Hard Precalculus Project warriors837 0 204 May 19th, 2009, 8:40am by towr fractal maze towr 18 2843 May 19th, 2009, 2:54am by towr Moved: k-sided die rolled n times jarls 0 204 May 1st, 2009, 1:20am by jarls Moved: Tough question Polymath101 0 223 Apr 27th, 2009, 12:41am by Grimbal Anybody good with sequences? Polymath101 0 216 Apr 26th, 2009, 8:10pm by Polymath101 How far can a truck go carrying it own fuel? « Pages 1 2 3 » Feijia Zhu 70 6569 Apr 25th, 2009, 11:50pm by Hippo Four-leg table on smooth terrain brac37 4 307 Apr 24th, 2009, 11:35am by brac37 Nonverbal IQ Test (Other Half of Ultra Test) Polymath101 8 508 Apr 20th, 2009, 7:20pm by Polymath101 Online Verbal IQ Test ThudanBlunder 22 1701 Apr 15th, 2009, 7:43pm by Polymath101 Hard: Criminal Cupbearers « Pages 1 2 3 4 » Cody Batt 88 4480 Apr 10th, 2009, 2:03pm by towr Fork In the Road II Macduff472y 12 1312 Apr 2nd, 2009, 4:37pm by rmsgrey A question from the Russian MO wonderful 12 1035 Apr 2nd, 2009, 6:04am by Immanuel_Bonfils Pages: 1 2 3  ...  24 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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