To determine if 9 is a happy number or unhappy number, we square each digit in 9 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 = 81
82 + 12 = 65
62 + 52 = 61
We kept doing the math above and it just started looping the same numbers and never got to 1. Since, we did not get to 1,
9 is an:
Unhappy Number
Is 10 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.
|
|
