Happy numbers are numbers that lead to 1 when replaced by the sum of the square of their digits. For instance, 19 is a happy number because 1^2 + 9^2 = 82, 8^2 + 2^2 = 68, and 6^2 + 8^2 = 100, 1^2 + 0^2 + 0^2 = 1. Have you found your happy number? #HappyNumber #MathFun