Problem:
When Ringo places his marbles into bags with  marbles per bag, he has  marbles left over. When Paul does the same with his marbles, he has  marbles left over. Ringo and Paul pool their marbles and place them into as many bags as possible, with  marbles per bag. How many marbles will be left over?
Answer Choices:
A. 
B. 
C. 
D. 
E. 
Solution:
The marbles left over will fill one more bag of marbles leaving marble left over.
The problems on this page are the property of the MAA's American Mathematics Competitions