Count On
Explorer
Explorer:
Puzzle of the Day
These puzzles are also printed in Eight days a week, a booklet published by the Association of Teachers of Mathematics.
On average you inhale about 0.6 of a litre of air in one breath (that's about a pint). Estimate how much air you breathe in a year.
Answer: 10 per min is over 3 million litres, over 5 million pints
