Ritangle - an Integral maths competition

Ritangle is a competition for teams of students aged 16 - 18 of A level Mathematics, the International Baccalaureate and Scottish Highers (or qualifications with equivalent content)

No knowledge of mathematics beyond A level Mathematics required

Twenty-four questions released on weekdays provide information needed for the final challenge.

Correct answers to these questions are needed to solve the final question.

Download a classroom poster about Ritangle

Registration for Ritangle 2020 is open and the first two questions have been released.

The registration form and answer check are now available below.

The final (multi-part) question will be made available at 4.00pm on Tuesday 8th December 2020.

The prize? A maths hamper, including a free year long subscription to Integral, and trophy for the school or college of the winning team!

Many thanks to Maplesoft and Hodder Education for their donations to the hamper, more of the contents of the hamper will be revealed during the competition.

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Creative, challenging, innovative - Ritangle nurtured teamwork, enthusiasm, resilience. Absolutely loved it

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Maths teacher

First, please read the rules of the competition. Team captains need to register their team take part in Ritangle. It is essential that a team is registered to be able to submit answers to the final question. The rules describe the role of the Nominating Teacher - in particular the Nominating Teacher needs to be available to be contacted by e-mail on 15th and 16th December 2020.

Team Captain Name:

Captain's E-mail:

Team Name:

School/College name:

Nominating Teacher Name:

Nominating Teacher Email:

I agree to the competition rules as stated here and that the nominating teacher may be contacted, only in relation to this competition, via the e-mail address provided. The captain's e-mail address will only be used to send e-mails in response to answer submissions via forms on these pages. E-mail addresses provided will not be passed on to any other organisation or used for any purpose other than this competition.

Data Privacy

The information you provide here is being collected by MEI.

MEI value the privacy of your personal data. Please see MEI’s Privacy Notice. This explains how we collect, store and handle your personal data.

Then.....
check your answers here!

Answers to questions 1 to 24 can be checked via this button.

Please don't share correct answers with anyone outside of your team.

Submit your entry for Ritangle 2019

Teams should only use the form below once they are ready to make a complete submission of their answer to the final question. The link above should be used to release clues and information about the final question. Only submissions to the form below count as entries for the competition.

...then submit your answer to the preliminary round to unlock a clue!

Once you have registered your team (complete the form and submit your registration using the 'Register your team' button) you may submit an answer to the preliminary round below. The captain's e-mail address is required again so we can check your team has been registered.

The answer to the preliminary round is a string of 18 digits. The first two digits of this string are the position in the alphabet of the answer to preliminary question A. The other 16 digits are as described in preliminary questions B to E.

Captain's E-mail:

Answer: (18 digits left)

When you submit an answer an e-mail will be sent to both the team captain and the nominating teacher. For correct answers this will contain a clue for the main competition. If your answer is incorrect then you can try again. You don't need the clue to solve the main competition.

Follow the instructions carefully to get the final answer for each question, particularly in relation to rounding. These are needed for the final question which will be released at 4.00pm on Tuesday 8th December 2020.

Keep you answers safe for now. Please don't share answers outside of your team; others are having fun finding them!

Ritangle 2020 questions so far in pdf form.

Corrections, clarifications and advice for Ritangle 2020.