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**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,588

Each 1st of the month, there is a new puzzle

at this webpage:

http://www.research.ibm.com/ponder/

**igloo** **myrtilles** **fourmis**

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,569

Challenging stuff ... I think you would need the better part of a month to solve them, too!

That integer puzzle one (October) sounds fun.

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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