by esledge Mon Jul 23, 2012 12:13 pm
The question would probably be more accurate if it where phrased in word form: "If a divided by b has a remainder of 4, what is the smallest possible value of a + b?"
I think whoever wrote the question probably used the a/b form as shorthand, reasoning that a/b is said "a divided by b." But you are right that 4/5 has a remainder of 4/5 when divided by an integer, and furthermore, the "when divided by ____" specification is missing.
We'll make a note to change this in a future edition. Thanks for raising the concern!