Ritangle is a competition for teams of students of A level Mathematics, Scottish Highers or the International Baccalaureate
No knowledge of mathematics beyond A level Mathematics required
Four of the five preliminary round questions have now been released. The final preliminary round question will be released on 6th November 2017. These unlock a clue for the main competition.
For the main competition, one question will be released daily for 21 consecutive weekdays. The first question will be released on 9th November 2017.
The final question unlocks an overall answer based on the solutions to all the questions
A maths hamper prize, including a free year long subscription to Integral, and trophy for the school or college of the winning team!
Technology can help with some Ritangle questions
Registration for Ritangle is now open (see below).
The five preliminary questions
We would like to clarify that, in Preliminary question A, a self-descriptive number needn't have exactly 7 digits. We have slightly altered the question shown here from the version originally released to help clarify this.
The answers to the preliminary questions combine to give a string of 17 characters.
Registered teams will be able to submit their answer to this from 0900 on 6th November 2017.
A correct submission returns a clue for the main competition by email.
Preliminary question E will be available at 0900 on the 6th November.