Problem:
A store owner bought pencils at each. If he sells them for each, how many of them must he sell to make a profit of exactly
Answer Choices:
A.
B.
C.
D.
E.
Solution:
Since he bought pencils at each, he paid . To make profit he must take in . Therefore, selling the pencils for each, he must sell pencils.
Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions