Puzzles

How big is the bird?How big is the bird?

Sharing cakesA deceptive brain teaser about profit sharing.

This puzzle is apparently used in job interviews — would you pass?

Magic 19Number the dots so that each line of three adds up to 22.

Creating squaresBe the first to mark the corners of a square to win this game!

DripsHere's one of our favourite strategy games.

Dropping eggsStretch your mind with this mess-free egg puzzle.

Counter logicA logic teaser in honour of George Boole.

Equal averagesExploring the five different notions of average.

Crooked coinMaking a biased coin fair.

It's a long way to the topIn how many ways can you make it up the stairs?

Prime mysteryMaking a very special number out of primes.