My daughter is in 7th grade and is about to take her 7th grade NC EOG test next week. I found a sample test and printed it out along with the answers. Some of the questions are stumping me (and her). This is one of them.

A 20-foot piece of rope will be cut into as many 1 1/2 foot sections as possible. How much rope will be left over?

A) 6 inches

B) 6 2/3 inches

C) 10 inches

D) 13 1/3 inches

I divide 20 by 1 1/2, and get 13 1/3, so what's left over is 6 2/3. The answer sheet says that the answer isA) 6 inches. How are they getting this?