Puzzle 1: You are given nine gold coins that look identical. You are told that one of them is fake, and that this coin weighs ...

What’s more, doing maths is often a collaborative endeavour – and can be a great source of fun and fulfilment when people work together on problems. Which brings me to these festive-themed puzzles, ...

Duah: Using puzzles, both at home and in classrooms, can restore the often-forgotten truth that learning happens in ...