Find amounts of money that can be made up in two ways so that one set of coins has twice as many coins as the other (but not using only 1c and 2c coins). e.g. 71c is 50c, 20c, 1c (3 coins) or 20c, 20c, 20c, 5c, 5c, 1c (6 coins)
25¢ + 10¢ + 50¢ = 85¢ = 10¢ + 10¢ + 10¢ + 5¢ + 25¢ + 25¢
There are 31 students in a class, number of girls is one more then number of guys. We need to form a team of four students. All four in the team cannot be from same gender and number of girls and guys in the team should not be equal. How many ways can such a team be made?
