The New Optical illusion image has 14 columns and nine rows, and the challenge is to find out the lone number '7103.' ...

This tricky number game challenges viewers to find ‘46’ among a grid of 64s, and only those with sharp eyesight can spot it ...

The trick here is that your eyes get used to the pattern right away. Once the brain sees row after row of the same figure, it stops searching for anything unusual. That is why the odd number blends in ...

We recently had a rainy weekend interrupt our original plans to go geocaching. Instead, I took inspiration from John Baichtel's recent posting - Codes For Kids - to introduce my kids to ciphers.

The trick lies in repetition. Once the brain sees the same number appear dozens of times, it stops paying close attention. Psychologists often call this “visual fatigue.” Your eyes are scanning, but ...