If a and b are positive integers, a + b <1 5, and a > 5, what is the greatest possible value of a - b?
A. 1
B. 5
C. 10
D. 11
E. 12
We want the greatest possible value for a - b we want the greatest value for "a" and the smallest value for "b." And note these are both INTEGERS.
a = 13
b = 1
13 - 1 = 12