A version of this puzzle originally appeared in the October 1960 issue of Scientific American. What’s the Most Distant Galaxy ...

The chessboard has been the source of many ingenious puzzles that involve spatial reasoning and insight thinking. The seven ...

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What’s more, doing maths is often a collaborative endeavour – and can be a great source of fun and fulfilment when people ...

Iowa State sharpshooter Milan Momcilovic uses the mantra "Jellybean" for his hot start to the season. Here's the scoop on that.

In the 2025 competition, Tortoise Protocol was runner-up for the Puzzlers’ Award, which is determined by attendees who vote ...

One afternoon, Lori Anderson and her 7-year-old, Lindsey, spotted a small maple tree in La Mirada, California. Anderson asked her daughter how many leaves she thought were on the tree. Lindsey’s guess ...

In this video, we break down a deceptive mathematical argument that claims 1 + 1 = 3 and expose exactly where the logic goes ...

Label the rectangles correctly with the letters A to I. Show puzzle solution Only the four blue-shaded rectangles below intersect three other rectangles, and therefore they must be F, G, H and I. H ...

Holidays bring celebration, rest and, for many families, long stretches of indoor time. For some, this means tabletop games quickly reappear on kitchen tables. Games provide opportunities for learning ...

Global warming or just one more torrid estival romance? At left, a cylindrical roxy glass is filled with a tall ice prism. The icy rectangular prism, with square bases, fits snugly in the cylinder.

Francis Duah does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their ...