Confused about what it's asking me to do and where to start?

[janekelly]

The sum of the digits of a large number is 21, and the number is even. Using the divisibility rules, by which number or numbers is the large number divisble?

 

[royhaas]

Re: Confused about what it's asking me to do and where to st

The number is divisible by 3 and is even. What does that tell you?