โจทย์ Math SP TG - If a+ b = 10 and both a and b are positive integers,what is the largest possible value for a?

If a+ b = 10 and both a and b are positive integers,what is the largest possible value for a?

A. 6
B. 7
C. 8
D. 9
E. 10

Correct Answer: D

Explanation:

For a to be as large as possible, make b as small as possible. If b = 1, then a = 9.