Question

Find the number of rectangles from in a chess board. (a square is also consid¬ered a rectangle)

Answer 1

I made a formula that if a square is made up of small and same size of square with in then the number of rectangle and square in that square is equall to the whole square of sum of conscutive number from 1 to number of square in a row or columns. Example- number of square and rectangle in a chess board is equall to whole square of {1+2+3+4+5+6+7+8} that is whole square of 36 which is equall to 1296
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