Brain teasers have always fascinated people, challenging their logical thinking and problem-solving abilities. Among the most popular are maths-based puzzles, which often spark debates over the ...

This holiday-themed brainteaser looks simple, but it's quietly tripping up adults everywhere. A math teacher walks us through solving it.

GCHQ has released their annual Christmas puzzle for 2025, even providing prospective codebreakers with some hints.

The rules of Sudoku dictate that every row, column and 3×3 bolded box in the completed grid must contain the digits 1 through 9 exactly once. A surprising fact emerges from these simple rules. In ...