A geometry problem over a century old has just found its definitive answer. Mathematicians have confirmed that the solution proposed by Henry Dudeney in 1907 was indeed the most efficient possible.

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." When 2D puzzles are no longer exciting, 3D brain teasers are the way. These handheld puzzles require ...

This vintage brain teaser posted to Futility Closet uses geometry to illustrate how wealthy individuals can manipulate access to shared resources. Can you solve it? "Suppose there was a pond, around ...

All the Latest Game Footage and Images from Triz: Sacred Geometry Puzzles Disentangle the color web of mysterious geometric interweaving and discover fascinating hypnotic shapes. Distract from reality ...

Tri is an interesting mind-bender of a puzzle game, in the sense that players must move forward by building triangles to help them across various 3D obstacles. There are numerous dangers that include ...

Looking for gift for a friend. She's got a bunch of nice wooden geometric puzzles that are both fun to play with and look neat on display. I'm looking to get something in that kind of vein, but my ...

Chop up a square into four pieces, and reassemble them into a triangle. This kind of geometric dissection puzzle delighted ancient Chinese scholars. Chemists have now created self-solving dissections.