A friend of mine recently kindly made me a present, using their 3D printer – a puzzle made up of 21 pieces, three each of seven different shapes. The statement of the puzzle is as …

Often at this time of year, people are visiting family, and sometimes traditional games and toys come out to occupy your time. If you’ve got a deck of playing cards handy, you can perform a …

Here are the solutions to the eight candle puzzles we posted earlier. The candles cost €1.05, and the matches cost €0.05. Every 30 seconds the number of people whose candles are lit doubles, starting with …

Around this time of year, people light a lot of candles in celebration of the season. Here is a selection of candle-based maths puzzles you can share with friends and family! We’ll share the solutions …

Squares – shapes with four right-angle corners, and four equal-length sides – are lovely. Mathematicians especially love them, as evidenced by the number of nice geometrical and numerical constructions based on squares. For example, a …