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wu :: forums    riddles    hard (Moderators: SMQ, Icarus, Eigenray, william wu, ThudnBlunder, towr, Grimbal)    Coin weigh game « Previous topic | Next topic » Pages: 1  Reply Notify of replies Send Topic Print    Author  Topic: Coin weigh game  (Read 866 times) uzo Newbie     Posts: 6 Coin weigh game   « on: Feb 24th, 2008, 12:39am » Quote Modify Hello,   I need the solution to the following game. There are 39 coins which need to be weighed on a scale. There is one fake coin which is either heavier or lighter than the other ones. You have only 4 weighs. Any suggestions? Here is the link to the game:     http://www.novelgames.com/flashgames/game.php?id=4     Regards IP Logged ThudnBlunder wu::riddles Moderator Uberpuzzler The dewdrop slides into the shining Sea     Gender: Posts: 4489 Re: Coin weigh game   « Reply #1 on: Feb 24th, 2008, 1:11am » Quote Modify on Feb 24th, 2008, 12:39am, uzo wrote: Any suggestions?   Search for relevant previous threads here. IP Logged THE MEEK SHALL INHERIT THE EARTH.....................................................................er, if that's all right with the rest of you. uzo Newbie     Posts: 6 Re: Coin weigh game   « Reply #2 on: Feb 24th, 2008, 3:23am » Quote Modify Thank you, but I didn't find any relevant threads. IP Logged towr wu::riddles Moderator Uberpuzzler Some people are average, some are just mean.     Gender: Posts: 13730 Re: Coin weigh game   « Reply #3 on: Feb 24th, 2008, 11:01am » Quote Modify First: divide the 39 coins in three group, weigh two against each other; if they're equal, the fake coin is in the third group.   Second step:  ...   Third step: PROFIT!   Probably more useful: http://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi?board=riddles_har d;action=display;num=1132320902 http://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi?board=riddles_har d;action=display;num=1050065099 IP Logged Wikipedia, Google, Mathworld, Integer sequence DB Pages: 1  Reply Notify of replies Send Topic Print 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 « Previous topic | Next topic »

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