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Monday, March 20, 2017

Friday's math problem

I mis-stated Friday's math puzzle.  Find 2 consecutive numbers such that, when you add the digits of the first number, the sum is divisible by 7 and the sum of the digits of the second number is also divisible by 7. Sorry about that!

New article about Erno Rubik.;page=15  Very old article about Rubik.

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