User contributions
- 04:14, 5 January 2025 (diff | hist) . . (-715) . . 1999 AMC 8 Problems/Problem 25 (→Solution 6 (Sigma))
- 04:12, 5 January 2025 (diff | hist) . . (+1,314) . . m 1999 AMC 8 Problems/Problem 25 (→Solution 7 (Even more Sigma))
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
