Problem:
Roy's cat eats of a can of cat food every morning and of a can of cat food every evening. Before feeding his cat on Monday morning, Roy opened a box containing cans of cat food. On what day of the week did the cat finish eating all the cat food in the box?
Answer Choices:
A. Tuesday
B. Wednesday
C. Thursday
D. Friday
E. Saturday
Solution:
Because Roy's cat eats of a can of cat food each day, the cat eats cans of cat food in days. Therefore the cat eats cans in days and cans in days. The cat finishes the cat food in the box on the th day, which is .
The problems on this page are the property of the MAA's American Mathematics Competitions