keep counting
Probability
Level
2
how many squares are there in a 8x8 chess board (all sizes of squares)
The answer is 204.
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This will be easy if try this with a 3x3 square grid and see the pattern its actually sum of square numbers i.e. 9+4+1=14(for 3x3) simmilarly for our problem it is 64(1x1squares)+49(2x2 squares)+ .......+1(8x8 squares) =204 done now you can create many more probelm like npo of squares in 4x4 grid