Problem:
What is 1+3+52+4+6​−2+4+61+3+5​?
Answer Choices:
A. −1
B. 365​
C. 127​
D. 2049​
E. 343​
Solution:
Simplifying gives
1+3+52+4+6​−2+4+61+3+5​=912​−129​=34​−43​=1216−9​=(C)127​​.
The problems on this page are the property of the MAA's American Mathematics Competitions