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wu :: forums    riddles    medium (Moderators: Eigenray, william wu, Grimbal, towr, SMQ, Icarus, ThudnBlunder) Pages: 1 ... 18 19 20 21 22  ...  61 Start new topic    Subject Started by Replies Views Last post Fractions Benny 4 839 Feb 18th, 2008, 7:50pm by Eigenray Randomly Orring k2xl 4 444 Feb 18th, 2008, 7:40pm by ThudnBlunder "Boxed In" Graph Riddle k2xl 4 458 Feb 18th, 2008, 11:43am by k2xl Walking up stairs Earendil 17 2189 Feb 15th, 2008, 3:57am by JiNbOtAk Ways to merge mad 13 1438 Feb 14th, 2008, 1:29am by Grimbal Cavorite « Pages 1 2 » Icarus 29 2170 Feb 12th, 2008, 11:30pm by Eigenray Number of ways raj1 6 623 Feb 10th, 2008, 9:34am by Hippo Primes beginning and ending with 1 Michael Dagg 10 719 Feb 8th, 2008, 1:38pm by Obob Triangles and quadrilaterals with given perimeter ecoist 12 4075 Feb 7th, 2008, 1:02pm by Sir Col Towers of 2's modulo n Michael Dagg 5 573 Feb 6th, 2008, 1:02am by Hippo Radical power equality Michael Dagg 2 1132 Feb 5th, 2008, 3:42pm by Michael Dagg A condition for rationality? Michael Dagg 14 565 Feb 5th, 2008, 2:19pm by Hippo Frisky elephants problem Benny 23 840 Feb 5th, 2008, 2:12pm by Eigenray (2^n-1)/2 is prime cool_joh 7 548 Feb 3rd, 2008, 11:39am by Hippo Clock Solitaire Icarus 7 2498 Feb 2nd, 2008, 6:00pm by Icarus prove the sum =pi/3 « Pages 1 2 » tony123 34 2002 Feb 1st, 2008, 1:24am by pex one thousand rooms tony123 16 3689 Jan 27th, 2008, 7:58pm by temporary Disappearing Black Squares william wu 18 1840 Jan 26th, 2008, 10:08am by Icarus Circle and string: find the area D_S 7 3366 Jan 25th, 2008, 5:02pm by Icarus Find sum tony123 11 1429 Jan 24th, 2008, 10:44pm by mikedagr8 3 Right Triangles Michael Dagg 9 747 Jan 24th, 2008, 2:37pm by Joe Fendel Don't do what I say, eat! cool_joh 12 740 Jan 23rd, 2008, 5:51pm by temporary Circles in a corner Noke Lieu 8 518 Jan 22nd, 2008, 7:48pm by Noke Lieu Cutting and translating Triangle into Square « Pages 1 2 » Aryabhatta 26 1320 Jan 19th, 2008, 12:30pm by Hippo Balls in Holes HiddenHeart 7 1230 Jan 18th, 2008, 11:55pm by ThudnBlunder favorable 5-tuples balakrishnan 8 821 Jan 17th, 2008, 7:34am by balakrishnan Re: Variant of "Product & Sum" puzzl DVW 2 566 Jan 8th, 2008, 3:19pm by towr The person that makes it doesn't need it Missmarty 7 1806 Jan 6th, 2008, 7:15pm by JiNbOtAk 'Holey' set reciprocal sum never an integer Aryabhatta 9 925 Dec 31st, 2007, 12:20pm by Aryabhatta sin 1 cool_joh 8 610 Dec 30th, 2007, 5:39pm by ThudnBlunder Pages: 1 ... 18 19 20 21 22  ...  61 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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