Wild About Math! Making Math fun and accessible

24Jul/101

Mental Floss brain game

Mental Floss is one of my very favorite magazines. Here's a simple (if you see it) puzzle from their web-site:

The answer is here.

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  1. I didn’t see it, and had to look at their answer.

    Here’s a hint, for people who don’t want the answer, but are stuck…
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    Don’t look down if you don’t want the hint…
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    A big number farther out in the sequence is 20,005.


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