Optical Illusion Challenge: Find the Number 2 in 5 Seconds! This illusion shows many upside-down Z shapes—but somewhere in the mix is a number 2. Because the shapes look so alike, your brain has ...

Visual IQ Test: Spot the number 24 hidden among inverted 24s in 5 seconds! Here is your optical illusion challenge. This illusion plays on the brain's tendency to group similar shapes and patterns.