Ritangle 2020 took place 5 October - 15 December 2020.
Ritangle is a competition designed for teams of students aged 16-18 who are currently studying either:
For more information about Ritangle, please visit the page for this year's competition.
Congratulations to the winning team from
The Cherwell School, Oxford
The team from King Edward VI School, Stratford-Upon-Avon were runners up. They also produced some excellent work in stage 3 of the final question.
Teams from the following schools also reached stage 3 of the final question. Less than 5% of the teams that entered achieved this in a very challenging Ritangle 2020. Congratulations to all the schools and colleges below:
Released: 0900 GMT, 10th December 2020
In the long string of numbers formed from the answers to questions 1 to 24 you should see lots of 1 and 2 digit primes. Now think how that might be a code.
Released: 0900 GMT, 11th December 2020
From questions A to H you have another string of digits with lots more 1 and 2 digit primes in there. But this time the code is harder. Look back at all those names in questions 1-24 and A-H. They were chosen for a reason.