In the set of positive integers from 1 to 60, what is the sum of all the odd multiples of 5?  Pick one.
A) 180  B) 185  C) 190  D) 160  E) 165

Rationale: 1 - 60 5 - 15 - 25 - 35 - 45 are valid multiples of 5 . add them 5 + 15 + 25 + 35 + 45 + 55 = 180 a
Answer: A