The number of rectangles which are not squares in a chess board is

The number of rectangles which are not squares formed in a chess board is

Number of unit squares in a chess board is

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

The number of rectangles on a chess board is

(i) Find the number of reatangles of any size in a chess board (ii) Find the number of squares of any size in a rectangle of size 8xx 5 .

(i) Find the number of reatangles of any size in a chess board (ii) Find the number of squares of any size in a rectangle of size 8xx 5 .