To determine if 91 is a happy number or unhappy number, we square each digit in 91 and then add those numbers together.|
Then we repeat the process for the result until either the result turns to 1 or we realize it will never be 1.
If it becomes a 1, then it is a happy numbers. Otherwise, it is an unhappy number.
Here is the math to make it more clear:
92 + 12 = 82
82 + 22 = 68
62 + 82 = 100
12 + 02 + 02 = 1
Since we ended up with a 1 at the end, 91 is a:
Is 92 happy or unhappy number?
Do you think you can figure out if a number is happy or unhappy on your own know? Try the next number on our list and then check your answer here.