>If a year is divisble by 10, it can be a leap year
>If that same year is divisible by 100, it is not a leap year...
>However, if that same year is then divisble by 400, it is then a leap year...

400? I was told 1000. In plain english its easier to tell people like this (Yes, I know your wokring on the equation :-)

Its every 4 years, not including the hundreds (1900, 700) but including the thousands (1000, 2000).