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wu :: forums    riddles    hard (Moderators: Eigenray, SMQ, Grimbal, ThudnBlunder, towr, william wu, Icarus)    5 Red Balls and a Green One « Previous topic | Next topic » Pages: 1  Reply Notify of replies Send Topic Print    Author  Topic: 5 Red Balls and a Green One  (Read 492 times) Joe Fendel Junior Member     Posts: 68 5 Red Balls and a Green One   « on: Nov 17th, 2005, 6:03pm » Quote Modify Seeing the 12 balls riddle pop up here reminds me of this variant:   You have 5 red balls and 1 green one.  All the red balls weigh the same as the green one except one of the red ones weighs 1 gram more, and perhaps one of the red ones weighs 1 gram less.   In three weighings on a standard two-bowl balance scale, can you find which red ball is heavy and which - if any - is light? IP Logged 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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