Despite ongoing advances in medicine itself, healthcare systems today face a wide array of problems, including staff shortages, poor patient outcomes and high costs of care. Strained hospital ...

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

This geometry challenge puts your spatial reasoning and problem-solving skills to the test as you work to find the area using given clues and relationships. The explanation breaks the problem down ...

"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 ...