Question

Three different rectangles have an area of 20. What are the possible whole-number dimensions of the rectangles?

Answer 1

L = 20 W = 1
L = 10 W = 2
L = 5 W = 4

Study this carefully. It's a good problem to know how to do. The ancients solved problems by using this method. They started with biggest number they could on the left and multiply each number on the right as they went down (in this case by 2).