Optical illusion puzzles have been there for centuries and these are fun challenges that are designed to play tricks on our eyes and brains. Optical illusions work on a simple principle where it ...

A mind-boggling brainteaser is leaving people scratching their heads, as they race against time to spot an odd number in a sea of letters. The tricky puzzle, created by prescription glasses retailer ...

Challenge yourself with a number puzzle where an odd number lurks among '2222.' The key to solving lies in relaxing your gaze, breaking the image into quadrants, and identifying irregularities. This ...

A recent internet challenge involved finding an odd number among rows of the number 41 presented in various colors. This optical illusion aimed to test cognitive skills and visual perception.

An even number is a number that can be shared equally into two groups. For example, these 4 cubes can be shared into two equal groups of 2 cubes. So 4 is an even number. An odd number cannot be shared ...