Problem:
Estimate to determine which of the following numbers is closest to .205401​.
Answer Choices:
A. .2
B. 2
C. 20
D. 200
E. 2000
Solution:
.205401​≈.2400​=24000​=2000 where ≈ means "is approximately equal to".
OR
.205401​=.2051​×401≈5×400=2000.
Answer: D​.
The problems on this page are the property of the MAA's American Mathematics Competitions