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Climbing Complexity

11 to 14

In the 2020 Olympic Games, sport climbing was introduced for the first time, and something very interesting happened with the scoring system. Can you find out what was interesting about it?

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Drawing Doodles and Naming Knots

7 to 18

This article for students introduces the idea of naming knots using numbers. You'll need some paper and something to write with handy!

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Palindromes

5 to 14

Find out about palindromic numbers by reading this article.

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Degree Ceremony

16 to 18

Can you find the sum of the squared sine values?

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Janusz Asked

16 to 18

In y = ax +b when are a, -b/a, b in arithmetic progression. The polynomial y = ax^2 + bx + c has roots r1 and r2. Can a, r1, b, r2 and c be in arithmetic progression?