Can You Solve These?

Hi guzzlers

We use numbers every day to describe the world – distances, weights, speeds, debts, populations, and so on. Yet most of us struggle to have an intuitive sense of what these numbers mean. How big is big? How fast is fast?

Today I’ve set a different challenge to my usual mathematical puzzle. The 10 questions below are a test of estimation skills, common sense and general knowledge – but also of our feel for numbers.

Often the best way to get a deeper sense of a what a number means i...