This puzzle is a variation of the knights and knaves puzzles created by American mathematician Raymond Smullyan. It was published for the first time in its basic form by American philosopher and ...

The answers to today’s puzzles ...

New Code Lock logic game uses Fun Squared's Ninecode Challenge system, a visual logic puzzle using symbolic clues to ...

Last week, we asked you to solve ‘The Hardest Logic Puzzle In The World.” This week, we’re asking you to do it again – with a brand new puzzle. Let me begin by stating the obvious: The notion that any ...

In 1996, the mathematical logician George Boolos (above) published a paper describing “the hardest logic puzzle ever” which he attributed to the logician Raymond Smullyan. The puzzle has gained much ...

We are hardly ever consciously aware that we use logic to solve everyday problems. But what is logic? Is the logic used to prove theorems in mathematics the same kind that we use for our practical ...

In 2023, I posed 23 challenges as part of the Gizmodo Monday Puzzle series. Some require a bit of math, and others a light familiarity with physics; but most can be solved through logic and creative ...

Raymond M. Smullyan, a mathematician who died recently, often met people who said they hated math, and yet they loved his logic puzzles. Can you solve this sampling? Related Article A dealer bought an ...

(Solving) it only takes a minute, girl ...