puzzle

How big is the bird?

How big is the bird?

Sharing cake: Solution

A deceptive brain teaser about profit sharing.

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

Magic 19: Solution

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

Creating squares

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

Here's one of our favourite strategy games.

Stretch your mind with this mess-free egg puzzle.

Counter logic: Solution

A logic teaser in honour of George Boole.

Exploring the five different notions of average.

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