Here’s a classic brainteaser that I don’t like. What’s the next number in this sequence: 1, 11, 21, 1211, 111221, …? The answer is 312211, because each number describes the digits in the number that ...

FT.com will bring you the crossword from Monday to Saturday as well as the Weekend FT Polymath, Word Circle and Binary Puzzle. ft.com/puzzles ...

Get started solving the classic number puzzle with tips from some of the best solvers in the world. By Isaac Aronow Everybody can solve a hard Sudoku. Maybe not right now, maybe not without some ...

Among the natural numbers below 100, there are 30 with a special property. Jovan has listed them in the table here. But Jovan made a mistake, and one of these numbers must be replaced. Which number ...

All the Latest Game Footage and Images from The Number Puzzle In The Number Puzzle you follow easy rules to fill in a grid with the numbers 1-9. There are 500 puzzles in all! With 4 sets of rules and ...

Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.

All the Latest Game Footage and Images from The Number Puzzle The definitive intellect puzzle, simple yet full of depth. Look, there were a whole bunch of them, but...maybe they stopped making them ...