self Maths Puzzle

Find a four digit number which is a perfect sqaure and its first two digit are same and last two digit are also same.

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self Other Question



Consider a 16×16 chessboard. How many unordered pairs of distinct 1×1 squares are there on the chessboard which have at least one corner in common?
Details and assumptions

A pair of squares have at least one corner in common, if there is a point which lies on both squares.
how many zeros at the end of product of number from 1 to 100?