Online Math Open

The Online Math Open is an online math competition for teams of up to four people. This competition is renowned for having some of the most interesting, elegant, and high-quality problems written by the best high school students in the nation. For more information, see here.

To quote an official announcement

We are pleased to announce that the Fall OMO 2014 will be taking place from October 17 to October 28, 2014. You can register a team by following the instructions on our info page. OMO is a team-based contest, and we allow for teams to be up to four people. (Teams of size less than four are welcome too. In fact, every year some brave individuals solo the OMO!)

This contest is run completely over the Internet, and therefore, your team can consist of people from all over the world! We already have a team-forming thread in the OMO Forum.

We've created a set of thirty short-answer problems ranging in difficulty from easy to very challenging. Hopefully, you will find these problems to be instructive, elegant, but most importantly, fun to work on.

Cheers, The OMO Team

Note by Akshaj Kadaveru
6 years, 9 months ago

No vote yet
1 vote

  Easy Math Editor

This discussion board is a place to discuss our Daily Challenges and the math and science related to those challenges. Explanations are more than just a solution — they should explain the steps and thinking strategies that you used to obtain the solution. Comments should further the discussion of math and science.

When posting on Brilliant:

  • Use the emojis to react to an explanation, whether you're congratulating a job well done , or just really confused .
  • Ask specific questions about the challenge or the steps in somebody's explanation. Well-posed questions can add a lot to the discussion, but posting "I don't understand!" doesn't help anyone.
  • Try to contribute something new to the discussion, whether it is an extension, generalization or other idea related to the challenge.
  • Stay on topic — we're all here to learn more about math and science, not to hear about your favorite get-rich-quick scheme or current world events.

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold

- bulleted
- list

  • bulleted
  • list

1. numbered
2. list

  1. numbered
  2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1

paragraph 2

paragraph 1

paragraph 2

[example link]( link
> This is a quote
This is a quote
    # I indented these lines
    # 4 spaces, and now they show
    # up as a code block.

    print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in \( ... \) or \[ ... \] to ensure proper formatting.
2 \times 3 2×3 2 \times 3
2^{34} 234 2^{34}
a_{i-1} ai1 a_{i-1}
\frac{2}{3} 23 \frac{2}{3}
\sqrt{2} 2 \sqrt{2}
\sum_{i=1}^3 i=13 \sum_{i=1}^3
\sin \theta sinθ \sin \theta
\boxed{123} 123 \boxed{123}


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