1) During Math class Jim and John were playing 3x3 Tic Tac Toe. (On a 3x3 square grid two players place an X and an O sign alternating, each player having his own sign. The first person having 3 of his signs in a row, column or in a diagonal wins the game.) Upon noticing this activity, their Math teacher gave them the following penalty: They had to calculate how many different grid formations would give a simple victory to one of the players. (A simple victory means that the first 3 marks of a player make him a winner.) Two formations are considered to be the same if one formation can be moved into the other by rotation and/or reflection. If the numbers of X's and O's are different, then the formations are considered to be different.)

My son's answer is 87, is it correct?