# Math Help - An A and B problem

1. ## An A and B problem

A & B are two different numbers selected from the first forty counting numbers, 1 through 40 inclusive.

What is the largest value that
AxB
A-B can have?

Many thanks.

2. You want the largest numerator and the smallest denominator.
I would say $\frac{40 \cdot 39}{40-39}$