How many multiples of 3 are there between 10 and 100, exclusive ?	Choose the correct choice from the following.
A) 30	B) 29	C) 28	D) 31	E) 33

Rationale: "3 * 4 = 12 3 * 33 = 99 total multiples = ( 33 - 4 ) + 1 = 30 exclude 10 and 100 = 30 answer is a"
Answer: A