A brain teaser is a kind of engaging mental exercise. The purpose of this challenge or riddle is to force you to look at things critically and creatively, often in ways you're not familiar with. A ...

Optical illusions, like grids with hidden odd letters, challenge the brain and enhance cognitive skills. By carefully examining the grid, focusing on common differences, and systematically ...

YOU MAY have a genius IQ if you can spot the six odd letters hidden in the puzzle in under 13 seconds. This tricky brain teaser challenges you to spot the odd letters hidden in the wall of Xs. In t… ...

You need to have the eyes of a hawk if you can spot the odd letter out in this tricky brainteaser. By Christopher Sharp. 07:51, Fri, Nov 24, 2023 | UPDATED: 07:52, Fri, Nov 24, 2023.

But you have 20/20 vision if you spot the odd letter out. A heads-up at the very start: you are looking for a letter C. You have a relatively generous amount of time for this task, a full 19 seconds.

Test your cognitive skills with this tricky brain teaser that challenges you to find the odd X hidden within these colourful Ys in just 21 seconds – if you do you've apparently got a high IQ ...

YOU MAY have a genius IQ if you can spot the six odd letters hidden in the puzzle in under 13 seconds. This tricky brain teaser challenges you to spot the odd letters hidden in the wall of Xs. In t… ...