Sunday, January 16, 2011

Fun With Numbers

A couple of recent entries over at "Futility Closet" that I found entertaining...

First, a sort of prime-number magic square of sorts:

Who figures this stuff out... and are they still sane by the time they finish!??? ;-))
...actually, the person who concocted this square has a homepage here:

And then there's this deceptively-simple li'l story problem where all is not quite as it seems:

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