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wu :: forums    riddles    hard (Moderators: william wu, Eigenray, Grimbal, SMQ, towr, Icarus, ThudnBlunder) Pages: 1 2 3  ...  26 Start new topic    Subject Started by Replies Views Last post 100 prisoners & a lightbulb « Pages 1 2 » SMQ 26 18426 Nov 26th, 2012, 4:59pm by Paul Hammond Unsolved Problems in the Hard Forum « Pages 1 2 » Icarus 36 23068 Jan 28th, 2010, 11:12am by brac37 POST WHAT AM I PUZZLES TO WHAT AM I FORUM william wu 0 11022 Jan 30th, 2003, 12:12am by william wu ANSWERS VS. PROBLEM-SOLVING PROCESSES william wu 17 12367 May 10th, 2007, 8:33am by rmsgrey Another variation to the sum / product riddle Altamira_64 1 1238 Feb 2nd, 2013, 6:32am by SMQ airplane riddle benmartorano 3 2492 Oct 11th, 2012, 8:20am by Altamira_64 Ping Pong tournament Altamira_64 4 3400 Sep 16th, 2012, 6:09am by pex How fast is Santa flying? Grimbal 20 807 Apr 12th, 2013, 7:19am by SMQ Logicians and stamps Altamira_64 6 642 Apr 5th, 2013, 6:19am by towr Two envelopes problem - a variation Altamira_64 13 3648 Feb 26th, 2013, 12:52pm by roady Albert Einstein Riddle tsitut 1 1110 Feb 21st, 2013, 4:55am by rmsgrey Heet seeking missiles jollytall 11 3511 Jun 21st, 2008, 4:15am by NightBreeze Monotone Paths in Graphs william wu 10 3369 Feb 5th, 2013, 4:34am by rmsgrey Chess Game Reconstruction FiBsTeR 20 2619 Jan 25th, 2013, 1:52am by snozwuncle Guessing Cards Suit « Pages 1 2 » Barukh 39 3910 Jan 10th, 2013, 11:52am by jollytall Highway (to) 61 revisited Mickey1 15 3526 Jan 9th, 2013, 7:10pm by Mickey1 integration MonicaMath 16 4807 Jun 6th, 2010, 4:40pm by SWF Egg Dropping « Pages 1 2 » Trevor Squires 30 7791 Nov 11th, 2012, 11:09am by jollytall Moved: NBA teams Altamira_64 0 1827 Nov 9th, 2012, 7:11am by pex Moved: Combinatorics puzzle zbudde 0 1945 Oct 29th, 2012, 11:44pm by towr Locker Room Dilemma inexorable 18 3966 Oct 15th, 2012, 5:03am by rmsgrey Holidays in Bahamas Altamira_64 4 2304 Oct 12th, 2012, 7:56am by Altamira_64 How many queens? « Pages 1 2 » Icarus 26 7577 Oct 6th, 2012, 5:09am by peoplepower partial algorithm to dropping eggs summersolstice 0 2196 Oct 5th, 2012, 1:12pm by summersolstice three-way pistol duel « Pages 1 2 3 4 5 » klbarrus 107 32916 Jun 1st, 2012, 8:04am by v_blade Pop Quiz Riddle « Pages 1 2 3 4 5 6 7 8 9 10 » Jackass 242 41355 Apr 28th, 2012, 1:30pm by Bobzor Fractal Gemotry simsimthedim 3 3153 Aug 28th, 2012, 5:48am by rmsgrey Moved: 10x10 Vending Machine mattian 0 2972 Jul 17th, 2012, 8:54am by Grimbal Seating Couples william wu 6 5873 Jul 19th, 2012, 6:33am by nakli Variation to the sum - product riddle Altamira_64 11 2437 Jun 25th, 2012, 4:24am by N/A Pages: 1 2 3  ...  26 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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