The 'hardest logic puzzle in the world' is leaving people utterly ... On this puzzling isle, 100 individuals sport blue eyes, another 100 brown, and there's the Guru, sporting green eyes.

The best thing? Einstein’s Cats costs only £4.29. It’s an absolute no-brainer if you enjoy basic puzzles and love cute cats.

The 'hardest logic puzzle in the world' has left many utterly ... The island is home to 100 individuals with blue eyes, another 100 with brown eyes, and a Guru sporting green eyes.

It might not seem like there's enough information to solve these logic puzzles at first—but that's part of the fun! Riddles for kids may seem easy, but you'll have to be sharp to solve them.

By Elie Levine and Sam Corbin Sudoku is like any other logic puzzle, in that it relies on deductive reasoning for its solution. There are numbers in the game, but no arithmetic is required to ...