Math Multiple Choice
For positive integers a and b, let a 
b be defined as ab +1. If x and y are positive integers and x y = 16, which of the following could be a value of y?
| I. | 1 |
| II. | 2 |
| III. | 3 |
(A) I only
(B) II only
(C) I and III only
(D) II and III only
(E) I, II, and III
(from the October 16, 1999 test)
