For years, a French mathematician searched for a proof that a gigantic number is prime. His method is still used 150 years ...

Misconceptions about what to do when a child disappears can delay vital action. The Independent separates fact from fiction ...

A visual puzzle challenges you to find two hidden numbers, 58 and 33, amidst a sea of 53s within 12 seconds. This exercise ...

A challenging optical illusion tests your observation skills by hiding the number 33 within a grid of 66s and 88s, all within ...