Find us on Youtube  Find us on Daily Motion  Find us on Twitter  Find us on Facebook  
Sign In
Contact Us

Caribou News

In response to School Closures:

Writing contests at home
If your school is closed during the upcoming April & May Caribou Contests, students may be allowed to write at home under normal contest conditions (no calculator, no outside help, no communicating about contest content before announcements of results). We have tools to detect unfair participation, so please respect these rules. You will need to sign in with your name and access code. If you do not know your code, your Caribou Contact (teacher) can find it in their account.

Free Resources
To help keep students motivated to learn math at home, we have made all of the 2017-2019 contests and their solutions free to access in Previous Tests, even without an access code, until the end of the 2019-2020 Caribou Cup.
For schools who have purchased School Wide Contest Access, we are offering a free upgrade to the All-Inclusive School Wide Pass. Caribou Contacts need only email us to receive the upgrade.
Caribou is not just a math contest, but an online learning platform accessible anywhere, anytime, and well-suited to studying at home. A reminder of our free services :
  • entirely free Grade 2 contest level and October contest for all levels
  • 250+ video solutions on the Caribou Contests channel on YouTube and Daily Motion
  • interactive games and puzzles on the Games Page (limit of 5 mins/day without an access code)
Give these a try and share them with any friends, family, students and educators looking for online math enrichment resources.

Stay safe!
Your Caribou Team

About Caribou

The Caribou Mathematics Competition is a world wide online contest that is held six times throughout the school year. Each of these days, six contests are offered, one for each of the grade levels 2, 3/4, 5/6, 7/8, 9/10 and 11/12 and each one in English, French, Persian and Mandarin.

The Caribou Cup is the series of all Caribou Contests in one school year. Each student's ranking in the Caribou Cup is determined by their performance in their best 5 of 6 contests through the school year.

All support materials (written solutions, current year and previous years contests as online practise tests, online math and logic games, online mini courses) are also available without contest participation. Many of them are free.

Gallery of Participants

Join participants from all over the world. Your contact person (teacher, librarian, home school organizer) can upload pictures to the gallery after signing in.

Gallery of Posters

Take a look at all of our different posters!


The goals of this project are to:

Upcoming Contests

Contests can be started between 7:30AM and 3:30PM local time of the participating school. Students are given 60min to complete the test. For questions and concerns please visit our Help page.
8th(Wed) & 9th(Thu) April, 20202, 3/4, 5/6, 7/8, 9/10, 11/12
6th(Wed) & 7th(Thu) May, 20202, 3/4, 5/6, 7/8, 9/10, 11/12


Details for participation and fees can be found here.


Cash prizes are given out to the top performing students and schools in the Caribou Cup. Additionally, contest and Caribou Cup certificates can be printed after each test is marked. More information regarding prizes and a sample certificate can be found here.

Calcrostic of the Day

Calcrostics are a trademark in a Caribou Contest - one appears in nearly every contest.

Today's Calcrostic Puzzle

abc - add = bc
  - /   / ×  +
bdd /   c = ed
  = =   = =  =
fbc -  gd = gc
What is This? | How to Solve It?

Yesterday's Solution

54 ×   6 =  324
 - ×   × /    +
45 ×  36 = 1620
 = =   = =    =
 9 × 216 = 1944