wu :: forums « wu :: forums - hard » Welcome, Guest. Please Login or Register. Sep 9th, 2024, 8:59pm RIDDLES SITE WRITE MATH! Home Help Search Members Login Register
 wu :: forums    riddles    hard (Moderators: Icarus, Grimbal, Eigenray, william wu, towr, SMQ, ThudnBlunder)
 Pages: 1 2 3  ...  27 Start new topic
 Subject Started by Replies Views Last post 100 prisoners & a lightbulb « Pages 1 2 » SMQ 26 43004 Nov 26th, 2012, 4:59pmby Paul Hammond Unsolved Problems in the Hard Forum « Pages 1 2 » Icarus 35 45148 Jan 28th, 2010, 11:12amby brac37 POST WHAT AM I PUZZLES TO WHAT AM I FORUM william wu 0 16730 Jan 30th, 2003, 12:12amby william wu ANSWERS VS. PROBLEM-SOLVING PROCESSES william wu 17 18887 May 10th, 2007, 8:33amby rmsgrey power of 3 close to power of 2 jollytall 6 198 Nov 13th, 2023, 10:10amby jollytall Identify your favourite childhood games livinggod29 2 187 Jul 9th, 2023, 8:42amby rmsgrey fractal maze towr 19 12879 May 29th, 2022, 3:04pmby Grimbal Magician having 100 cards navdeep1771 2 318 Jan 24th, 2022, 3:25amby rmsgrey Stuck: How can you guess that? « Pages 1 2 3 4 » TruthlessHero 77 22341 Apr 12th, 2019, 9:54amby rmsgrey Integer series rmsgrey 4 542 Oct 16th, 2019, 5:47pmby rmsgrey The Dowry Problem (Part 2) navdeep1771 10 963 Jul 8th, 2018, 6:57amby rmsgrey Permutation Combination 2 navdeep1771 7 535 Jun 23rd, 2018, 3:46amby Grimbal Re: Probability Problem 1 navdeep1771 3 713 Jun 18th, 2018, 8:59pmby navdeep1771 Tricky Sequence navdeep1771 7 671 May 17th, 2018, 11:45amby navdeep1771 Arrive on time Altamira_64 4 1329 May 16th, 2018, 10:54amby alien2 Trigonometry Problem navdeep1771 6 982 Jan 12th, 2018, 6:29amby Grimbal k-card Magic trick redux Hippo 5 999 Jul 26th, 2017, 4:32amby Hippo Solution to CRIMINAL CUPBEARERS « Pages 1 2 » dayak 39 27247 Jul 2nd, 2017, 7:36amby Hippo Guess the coins Altamira_64 8 1355 Mar 30th, 2017, 3:22pmby impartial_james Knights - knaves variation Altamira_64 11 987 Dec 9th, 2016, 2:33pmby dudiobugtron 8 treasure chests, can change 1 Destiny 17 1474 Sep 2nd, 2016, 8:37amby rloginunix 3 Indistinguishable Dice lorentztrans 5 1563 Jun 27th, 2016, 6:03amby teekyman Security by obscurity in 100 bits ephyzy 3 951 Jun 18th, 2016, 2:06pmby ephyzy 8 apples Altamira_64 8 2058 Mar 13th, 2016, 1:26amby Altamira_64 Rubik's Cube « Pages 1 2 » william wu 45 31059 Mar 11th, 2016, 10:06amby Hippo Broken bike combination lock problem Ace_T 16 11087 Mar 11th, 2016, 9:29amby Hippo 3D Chessboard Full Control « Pages 1 2 » Barukh 47 14584 Mar 9th, 2016, 10:33amby Hippo In an apartment complex in New York... oceanvibe 6 1828 Dec 14th, 2015, 7:44amby rmsgrey You have been given the task of transporting 3,000 oceanvibe 2 921 Dec 10th, 2015, 7:22amby oceanvibe Elastic Collisions Barukh 2 884 Dec 2nd, 2015, 9:54pmby SWF
 Pages: 1 2 3  ...  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