Problem:
3+6+9+⋯+512+4+6+⋯+34=
Answer Choices:
A. 31
B. 32
C. 23
D. 317
E. 334
Solution:
3+6+9+⋯+512+4+6+⋯+34=3(1+2+3+⋯+17)2(1+2+3+⋯+17)=32.
Answer: B.
The problems on this page are the property of the MAA's American Mathematics Competitions