When you count to 5 on your hands, which finger do you start with? On Twitter, this question has been the subject of debate ever since comedian Ahri Findling posed it on March 19. “My wife and I ...

Counting is a useful thing to do. Counting on and back in the correct order is a maths super-power. You can count things like fingers, stones, steps and even pieces of fruit. Or you can count to ...