Q:Robert purchased $1500 worth of US saving bonds. If bonds are sold in $50 or $100 denominations only, which of the following CANNOT be the number of US saving bonds that Robert purchased?	Choose the correct answer
A) 10	B) 20	C) 27	D) 30	E) 40
I started off with looking at the answer choices... 10-20-27-30 are in a tight range, so my guess was to look and rule out the bigger numbers.   The total amount is $1500. So with 40 bonds, each $50 = $2000 , we already exceed the $1500 limit. Hence 40 is the answer.
<result>E</result>
Q:Robert purchased $1500 worth of US saving bonds. If bonds are sold in $50 or $100 denominations only, which of the following CANNOT be the number of US saving bonds that Robert purchased?