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

Caribou News

About Caribou

The Caribou Mathematics Competition is a worldwide 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, Mandarin, Ukrainian, and Azerbaijani.

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.

Caribou Math from Home

Caribou contests have always been suited for home schooling. If you would normally participate at school but are unable to due to school closures, because you are self-isolating, or because you are opting to home school, please rest assured you can sign up and participate from home.

There are a few options depending on your situation:

More detailed instructions to follow soon.


Visit our Participation/Fees page for detailed information on fees and registration.


Visit the Prizes page to read about how cash prizes are awarded to top-performing students or to see examples of Caribou Contest and Caribou Cup certificates which can be downloaded and printed as soon as each test is marked.

Gallery of Participants

Join our international mathematics community of participants all over the world. Your Caribou Contact (eg.teacher) can upload pictures to the gallery when signed in.

Gallery of Posters

Print off one of our Posters to spread the word about Caribou! Feel free to share these on Social Media to help others who caribou math.


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 by default. Students are given 50 min to complete the test. For questions and concerns please visit our Help page.

Would you like to receive notifications about upcoming contests? Follow us on Facebook and Twitter or join our subscriber list here!

14th(Wed) & 15th(Thu) October, 20202, 3/4, 5/6, 7/8, 9/10, 11/12
11th(Wed) & 12th(Thu) November, 20202, 3/4, 5/6, 7/8, 9/10, 11/12
13th(Wed) & 14th(Thu) January, 20212, 3/4, 5/6, 7/8, 9/10, 11/12
10th(Wed) & 11th(Thu) February, 20212, 3/4, 5/6, 7/8, 9/10, 11/12
7th(Wed) & 8th(Thu) April, 20212, 3/4, 5/6, 7/8, 9/10, 11/12
5th(Wed) & 6th(Thu) May, 20212, 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

 ab - cb = db
  + /  - ×  -
ebb /  a = cb
  = =  = =  =
eab / ea = eb
What is This? | How to Solve It?

Yesterday's Solution

24 + 12 = 36
 + /  / ×  -
48 /  2 = 24
 = =  = =  =
72 /  6 = 12