Number of ways placing 2 rooks on a chess board such that they are not in attacking positions, if rooks can attack only for a same row or in same column is

Find the number of ways 2 squares can be chosen out of 8xx8 chess board such that they have only one corner in common.

Number of ways that two kings one black and one white can be placed on a 8xx8 chess board such that they are not on adjacent squares is

If 7xx7 grid is cut from an 8xx8 chess board, such that the corners are back in how many ways we an put 2 identical coins,one on a black square and one on a white square,such that they are not placed in the same row or same column

In how many ways is it possible to choose a white square and a black square on a chess board so that the squares must not lie in the same row or column?

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.

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.