Diamond problem

A Diamond problems means we have two known numbers and we have to two unknown numbers. The numbers are placed in a diamond format one number is on the top row two numbers on the second row and one number in the third row. The two numbers in the middle row are multiplied to get the first number and are added to get the number at the last row.


For and example if 10 in the top row and 7 is in the bottom row that means 5 in the left middle row and 2 in the right middle row

Source for image and Info (http://www.tutorvista.com/math/how-to-solve-diamond-problems)