How big is the bird?How big is the bird?
Sharing cakesA deceptive brain teaser about profit sharing.
Weighing ballsThis 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.