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.

Mathematical puzzles like these continue to engage people on social media because they test logical reasoning skills in ...

Over 9 million updated Income Tax Returns have been filed over the last four years which fetched ₹9,118 crore to the exchequer, Parliament was informed on Monday. To encourage voluntary compliance, ...

A simple math puzzle has caused a flurry of controversy among math afficionados on the internet over the correct way to find the answer. The brain-teaser, which has gone viral on X (formerly Twitter), ...

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 ...

Think you're a whiz at these puzzles? Get ready to challenge yourself with this optical illusion that's leaving many stumped. The claim? Only geniuses can find the hidden number 6767. Are you up ...

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 ...