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Common Answers

Have you entered September's Common Answers?

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Puzzle - Answer

How many squares, of any size, do not contain a Rook?

Chess Board

 [Ref: ZRZL] © Kevin Stone

Answer: 128.

There are 62 squares of size 1x1.
There are 41 squares of size 2x2.
There are 18 squares of size 3x3.
There are  6 squares of size 4x4.
There is   1 square  of size 5x5.

A total of 62 + 41 + 18 + 6 + 1 = 128.

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