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January 30, 2015

January 30, 2015

Posted by **Lacey** on Sunday, December 18, 2011 at 11:51am.

- Algebra -
**Steve**, Sunday, December 18, 2011 at 6:04pmSince you can pick 15+25+40=80 marbles and get no greens, you must pick 81 to be sure that at least one is green.

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