In the set of positive integers from 1 to 100, what is the sum of all the odd multiples of 5?
Pick one:
A) 180 B) 245 C) 320 D) 405 E) 500
reduce 1 - 100   5 - 15 - 25 - 35 - 45 --55--65--75--85--95 are valid multiples. Add them --&gt;500   500
<result>E</result>
In the set of positive integers from 1 to 100, what is the sum of all the odd multiples of 5?