Problem:
Chris' birthday is on a Thursday this year. What day of the week will it be days after her birthday?
Answer Choices:
A. Monday
B. Wednesday
C. Thursday
D. Friday
E. Saturday
Solution:
days is weeks and days, so the desired day is four days after a Thursday, that is, a Monday.
days is weeks less days, so the desired day is three days before a Thursday, also a Monday.
Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions