Primes, Composites, Factors... Oh my!

After checking our homework (the factor trees... answers posted below), we reminded ourselves about primes and composites and the kids got some problems to work out on this. They'll need to finish this for homework.

This sheet I do not have electronically, so I can't post it online yet.  But I am going to try and remember to post answers.  I've got to set a reminder for myself or something!  (I was supposed to post answers last night... and that didn't happen! ;) )