Problem:
Nine copies of a certain pamphlet cost less than while ten coples of the same pamphlet (at the same price) cost more than . How much does one copy of this pamphlet cost?
Answer Choices:
A.
B.
C.
D.
E.
Solution:
Only satisfies the hypothesis that ten copies of the pamphlet cost more that .
If is the price of the pamphlet, then and 10P or . Thus .
Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions