National Internet Math Olympiad
The National Internet Math Olympiad (NIMO) was a team-based series of online math tests for high school students. It was organized by Evan Chen.
Contents
Contests
Online Math Open
The Online Math Open (OMO) was a math Olympiad held in fall and spring. There are 30 questions (each worth 1 point), and each answer is a nonnegative integer less than or equal to 
. The test lasts for 12 days. The only electronic math tool allowed is a four-function calculator.
| OMO |
| Region: USA |
| Type: Short Answer |
| Difficulty: 1-9.5 |
| Difficulty Breakdown:
Problem 1-5: 1-3 |
NIMO Summer Contest
The NIMO Summer Contest was another online contest where each question was worth the respective question’s number points. Solvers can not return to a problem when a problem was skipped.
NIMO Monthly Contest
The NIMO Monthly Contest has 8 questions that must be solved in 40 minutes. Solvers can submit up to 3 attempts.
As of 2018, the NIMO Monthly Contest has been discontinued.
