Killer sudoku is similar to the other levels in that each of the numbers 1-9 must fit into each 9-by-9 square. No number can ...

This fun optical illusion tests your ability to focus! The cluster of related numbers conceals a number. Within 9 seconds, identify the concealed number among these numbers. To reveal the deception, ...

Killer sudoku is similar to the other levels in that each of the numbers 1-9 must fit into each 9-by-9 square. No number can ...

FT.com will bring you the crossword from Monday to Saturday as well as the Weekend FT Polymath.

A simple math puzzle has left internet users scrambling to find the correct answer.

The company says on its website that this is "one of the biggest commercially available puzzles in the world, both by the number of pieces and by its size." And as its name suggests, it features ...

PeopleImages.com / Getty Images Form W-9, Request for Taxpayer Identification Number (TIN) and Certification, is an Internal Revenue Service (IRS) tax form that businesses use to collect ...

Brainteasers have challenged minds since ancient times, offering mental exercises and puzzles ... multiplying the sum by the first number. For example, (3+5)3=24. Therefore, the answer to the final ...

Famous for iconic landmarks, both countries that attract most foreign tourists in Southeast Asia were named among global best retirement destinations in 2025 by Ireland-based magazine International ...

A "significant number" of countries will provide troops to a Ukraine peacekeeping force, Sir Keir Starmer's spokesman said. On Saturday, leaders from 26 Western countries - plus two EU leaders and ...