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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 …