Math: What is a “perfect number?”
While enjoying this surprisingly fine summer, the math tutor recalls a definition.
When I was a kid, I read in one of my math texts (it might have been grade six) that a “perfect number” is one whose factors (except itself, of course) sum to it.
Example: 6 is a perfect number.
Factors of 6: 1, 2, 3, 6
Sum of factors (excluding 6 itself): 1+2+3=6
Example: 28 is a perfect number.
Factors of 28: 1, 2, 4, 7, 14, 28
Sum of factors (excluding 28 itself): 1+2+4+7+14=28
I always thought it was an interesting definition. Curiosities like this are great; they keep you thinking about math when you don’t have to do any:)
Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.