Problem:
The sum 271+321+5191 is between
Answer Choices:
A. 10 and 1021
B. 1021 and 11
C. 11 and 1121
D. 1121 and 12
E. 12 and 1221
Solution:
The desired sum can be rewritten as 2+3+5+71+21+191 which equals 10+21+(a number less than 21) so B is correct.
Answer: B.
The problems on this page are the property of the MAA's American Mathematics Competitions