User contributions
- 19:02, 26 June 2017 (diff | hist) . . (-1) . . m 2012 AMC 12A Problems/Problem 25 (→Solution: the last paragraph had a typo: "We want this some to be...." changed to "We want this sum to be....")
Sign In
Register
math training & tools
Alcumus
Videos
For the Win!
MATHCOUNTS Trainer
AoPS Practice Contests
AoPS Wiki
LaTeX TeXeR
MIT PRIMES/CrowdMath
Keep Learning
Sign In
Register
