24 questions...
..one final challenge..
..and one winning team.

  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.


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


Maths teacher

Register your team now!

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.

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.

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.

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.


Ritangle information

  How technology can help with some Ritangle questions

  Some Frequently Asked Questions about Ritangle

  The prize hamper so far!

  Teachers' comments about Ritangle

Questions from previous competitions

  Ritangle 2019 questions

     Ritangle 2019 questions 1 - 25 (ppt file).

     Full solution to Ritangle 2019.

  Previous Ritangle questions

     Ritangle 2018 Questions

     Ritangle 2018 Answers to questions 1 to 25

     Ritangle 2017 Questions

     Ritangle 2017 Answers to questions 1 to 20

     Ritangle 2016 Questions

     Ritangle 2016 Answers to questions 1 to 22

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