To determine if 709 is a happy number or unhappy number, we square each digit in 709 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:
72 + 02 + 92 = 130
12 + 32 + 02 = 10
12 + 02 = 1
Since we ended up with a 1 at the end, 709 is a:
Happy Number
Is 710 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.
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