Problem:
The ratio 102001+102001102000+102002 is closest to which of the following numbers?
Answer Choices:
A. 0.1
B. 0.2
C. 1
D. 5
E. 10
Solution:
We have
102001+102001102000+102002=102000(10+10)102000(1+100)=20101≈5.
Answer: D.
The problems on this page are the property of the MAA's American Mathematics Competitions