How many squares, of any size, can you find on this chess board which do not contain a Rook?

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ravi Expert Asked on 12th July 2015 in Puzzles.
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    There are 110 squares without a rook.

    There are 60 squares of size 1×1.
    There are 35 squares of size 2×2.
    There are 12 squares of size 3×3.
    There are 3 squares of size 4×4.

    A total of 60 + 35 + 12 + 3 = 110.

    SherlockHolmes Expert Answered on 12th July 2015.
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