... example, the Geometrical Mean of two numbers is the square root of the product of the two numbers The Geometrical Mean of three numbers is the cube root of the product of the three numbers 95 ... the numbers in the •six broken diagonals formed by the numbers 15, 9, 2,8, the numbers 10, 4, 7,13, the numbers 3, 5,14, 12 the numbers 6, 4,11,13, the numbers 3, 9,14, 8, and the numbers 10, 16, ... of the purchase from the amount of the coin or bill given in payment, they add from the amount of the purchase upto the next higher money unit, then to the next, and so on until they come to the...