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wu :: forums    riddles    hard (Moderators: Icarus, william wu, towr, SMQ, Eigenray, ThudnBlunder, Grimbal) Pages: 1 2 3 4 5  ...  27 Start new topic    Subject Started by Replies Views Last post Crossed Cylinders SWF 4 7990 Oct 29th, 2013, 7:27pm by rloginunix 5 coins and 5 weighings Altamira_64 23 14379 Oct 20th, 2013, 11:42pm by jousha22 The Engineer Problem Naumz 5 4637 Oct 2nd, 2006, 5:47pm by Icarus Square formation H7 5 7811 Jul 19th, 2007, 2:44am by towr airplane riddle benmartorano 3 8897 Oct 11th, 2012, 8:20am by Altamira_64 3 Enemies snags697 19 6058 Oct 22nd, 2013, 10:52pm by towr The Lion and the Lion Tamer Eric Yeh 21 13168 Oct 22nd, 2013, 12:04pm by Grimbal Statistics Benny 22 6798 Nov 3rd, 2008, 2:04am by towr HARD: Hamming Distance Questions « Pages 1 2 » -D- 48 35634 Oct 20th, 2013, 12:58am by Grimbal Bachelor's Dilemma « Pages 1 2 » tim 30 15377 Oct 16th, 2013, 5:29am by titan Particle Time tim 13 5074 Oct 15th, 2013, 9:16pm by titan A simple game Jonathan_the_Red 13 8347 Oct 15th, 2013, 2:48pm by titan CALENDAR CUBES II Hobbes 21 8382 Oct 15th, 2013, 1:45am by Grimbal Upside Down LCD display waka 13 5985 Oct 11th, 2013, 12:47pm by Grimbal Alien Experiment Enigami 3 4348 Aug 21st, 2013, 1:42am by nakli two pythagorean triples Christine 5 2788 Jul 24th, 2013, 4:23am by JohanC Monotone Paths in Graphs william wu 10 8811 Feb 5th, 2013, 4:34am by rmsgrey integration MonicaMath 16 8248 Jun 6th, 2010, 4:40pm by SWF generalize the prisoners' problem pandasbox 3 2463 Jul 5th, 2013, 5:41am by rmsgrey Ping Pong tournament Altamira_64 4 7843 Sep 16th, 2012, 6:09am by pex Logicians and stamps Altamira_64 9 6207 Jun 20th, 2013, 9:46am by Grimbal A conjecture about Mersenne primes and non-primes Mickey1 1 3354 May 29th, 2013, 1:32pm by Mickey1 Another variation to the sum / product riddle Altamira_64 1 4094 Feb 2nd, 2013, 6:32am by SMQ Albert Einstein Riddle tsitut 1 4573 Feb 21st, 2013, 4:55am by rmsgrey Heet seeking missiles jollytall 11 10917 Jun 21st, 2008, 4:15am by NightBreeze Chess Game Reconstruction FiBsTeR 20 7938 Jan 25th, 2013, 1:52am by snozwuncle Guessing Cards Suit « Pages 1 2 » Barukh 39 10521 Jan 10th, 2013, 11:52am by jollytall Highway (to) 61 revisited Mickey1 15 6597 Jan 9th, 2013, 7:10pm by Mickey1 Moved: NBA teams Altamira_64 0 3853 Nov 9th, 2012, 7:11am by pex Moved: Combinatorics puzzle zbudde 0 3637 Oct 29th, 2012, 11:44pm by towr Pages: 1 2 3 4 5  ...  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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