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Hard Chess Count Puzzle

Hard Chess Count Puzzle - 11 December

Can you count the number of rectangles in a chess board ?


For Solution : Click Here

5 comments:

  1. (7+6+5+4+3+2+1)*8*2 = 448
    (6+5+4+3+2+1)*7*2 = 294
    (5+4+3+2+1)*6*2 = 180
    (4+3+2+1)*5*2 = 100
    (3+2+1)*4*2 = 48
    (2+1)*3*2= 18
    1*2*2=4
    ----------
    1092 (Count of Rectangles such that side a is not equals to side b)

    However, if we add perfect squares as well i.e. 1092+204(perfect squares) then the answer would be 1296.

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