A game in which players take it in turns to choose a number. Can you block your opponent?
Can you find a strategy that ensures you get to take the last biscuit in this game?
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?
Five children are taking part in a climbing competition with three parts, where their score for each part will be multiplied together. Can you see how the leaderboard will change depending on what happens in the final climb of the competition?
Construct two equilateral triangles on a straight line. There are two lengths that look the same - can you prove it?
