Find the number of squares in chess board.

Find the number of squares in Chesboard.

Find the number of ways in which we can choose 3 squares on a chess board such that one of the squares has its two sides common to other two squares.

Find the number of ways in which two small squares can be selected on the normal chessboard if they are not in same row or same column.

The streets of a city are arranged like the lines of a chess board. There are m streets running from north to south and n streets from east to west. Find the number of ways in which a man can travel from north-west to south-east corner, covering shortest possible distance.

Find the number of divisors of the number N=2^3 .3^5 .5^7 .7^9 which are perfect squares.

Find the number of quadratic equations, which are unchanged by squaring their roots.

When a group of soldiers are arranged in 4 ddep hollow squares the number of soldiers in the front row is 16 more than the number of soldiers in the front row when they are arranged in a perfect square. Find the number of soldiers.

Find the number of rectangles excluding squares from a rectangle of size 9 xx 6

Find the square roots of -i

Find the square roots of -i