I want to know the average age of the people that use this site, but I know that not everyone is comfortable with sharing their age on the internet so I would like you to round to the nearest 10. Last digit ends with 1-4 you round down. Last digit ends with 5-9 you round up.
If you are 7 then you would say 10.
If you are 13 you would say 10.
If you were 15 you would say 20.
If you were 20 you would say 20.
Get it?