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 attention. Here it is in all its glory: “Three gods A, B, and C are called, in some order, True, False, and Random.

## What is the hardest jigsaw puzzle in the world?

Paul Lamond The Worlds Most Difficult Jigsaws – Cats Puzzle Another small puzzle that presents a big challenge, this 529-piece puzzler has the same image (though offset by 90 degrees) printed on the other side of each piece—making it hard to figure out which side is up.

## What is the hardest brain puzzle?

An MIT logic professor called this brain teaser the hardest logic puzzle ever. It involves determining the identities of three gods named A, B, and C by asking them three questions.

## What is the easiest puzzle to solve?

1. Easiest The nine-block Floppy Cube is one layer of a classic Rubiks, so its perfect for a beginner twister. When it is scrambled, smooth movers can solve it in as few as eight clicks. Even random guessers will get there eventually; the colors have only 192 possible combinations.