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wu :: forums    riddles    hard (Moderators: Grimbal, ThudnBlunder, william wu, SMQ, Eigenray, Icarus, towr) Pages: 1 ... 5 6 7 8 9  ...  27 Start new topic    Subject Started by Replies Views Last post BIRTHDAY TWINS « Pages 1 2 3 » borg472918433 57 24217 Nov 26th, 2008, 12:21am by towr Calculus question Benny 9 1666 Nov 21st, 2008, 10:21am by Benny Lucky number harsh487 6 1611 Nov 20th, 2008, 6:55am by towr How To Put These Numbers..? wustvn 4 1338 Nov 20th, 2008, 5:49am by wustvn Integers problem Benny 4 4086 Nov 17th, 2008, 4:37pm by Benny Moved: Height of BST harsh487 0 1343 Nov 17th, 2008, 10:27am by harsh487 Trig identity involving pi/11 « Pages 1 2 » perash 29 12922 Nov 7th, 2008, 4:07pm by Michael Dagg Random Graph Recursion william wu 14 4893 Oct 27th, 2008, 2:31pm by Eigenray Statistics: Model Selection Question william wu 1 1136 Oct 23rd, 2008, 9:00pm by friendly Past, Present, Future « Pages 1 2 » Rupert 42 9409 Oct 20th, 2008, 2:41pm by Shelter417 Digging wells Read the full problem to understand howard roark 12 2827 Oct 15th, 2008, 2:28am by Barukh probability challenging prob. « Pages 1 2 » Benny 48 5774 Aug 8th, 2008, 4:05pm by Benny PROLONG THE LINE jonderry 3 2275 Aug 4th, 2008, 2:06pm by towr Exploratoreum Exhibit teekyman 1 957 Jul 23rd, 2008, 6:26pm by Eigenray Throwing All Numbers From 2 to 12 ThudnBlunder 8 1223 Jul 23rd, 2008, 8:12am by mattian PAC Assesment JiNbOtAk 13 1707 Jul 22nd, 2008, 6:28pm by JiNbOtAk pq-p-q prime? cool_joh 2 1542 Jul 20th, 2008, 1:42am by cool_joh A horse and a snail NewTone 1 1742 Jul 9th, 2008, 10:08pm by Noke Lieu 157 ThudnBlunder 12 1320 Jul 8th, 2008, 4:35am by Eigenray Line Segments in a Square cool_joh 4 1102 Jul 6th, 2008, 12:20pm by Grimbal 4-Peg Tower of Hanoi Barukh 7 7781 Jul 6th, 2008, 6:57am by towr Coprime Cubes ThudnBlunder 3 1569 Jul 4th, 2008, 11:06am by Barukh Fork in the Road 1 RiddleGenius 10 4140 Jun 30th, 2008, 11:10am by joeyman Coin Flip Game Worth (solution?) « Pages 1 2 3 4 » Nicodemus 85 22651 Jun 27th, 2008, 12:04pm by malchar Mirror inversion « Pages 1 2 » BNC 44 22090 Jun 27th, 2008, 8:06am by malchar Find The Pairs (X, Y) K Sengupta 1 1817 Jun 21st, 2008, 4:41pm by Eigenray An IMO question: (4ab-1) | (4a^2 - 1)^2 wonderful 10 5764 Jun 19th, 2008, 3:43pm by Hippo Combinatorics Benny 8 1339 Jun 19th, 2008, 5:59am by rmsgrey Sausage duel Grimbal 15 2047 Jun 9th, 2008, 8:22am by jollytall Bass jollytall 0 797 Jun 8th, 2008, 8:21am by jollytall Pages: 1 ... 5 6 7 8 9  ...  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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