Problem:
The fraction halfway between 51β and 31β (on the number line) is
Answer Choices:
A. 41β 
B. 152β 
C. 154β 
D. 20053β 
E. 158β 
Solution:
231β+51ββ = 2158ββ=154β.
Answer: Cβ.
The problems on this page are the property of the MAA's American Mathematics Competitions