How many squares are there on a chessboard or checkerboard?? (the answer is not 64)Can you extend your technique to calculate the number of rectangles on a chessboard.
This another puzzle that was also e-mailed to me through this website. My instinct was that the answer was just a lot, but i thought about it and the solution is actually fairly simple...
The first thing is why the answer is not just 64.<All the red squares in the above picture...
