hey i have more problems that can really exercise the mind! here are 3. 1. prove if q is divisible by (r +s) then either q is divisible by r or q is divisible by s. 2. if d>0, (fd+ed) = d(f,e). proof. 3. a divisible by b => a^m divisible by b^m a,b,m are in Z+. i think i have some thoughts and i will share. 1. say that (b+c) = ma, where m is in Z+. after that, i am guessing... 2. could use contradiction here. say that d=0, then show the proof? anyone has any takes on this? 3. there exist m and n s.t. bn=ma. lost after here. anyone w/ information/thoughts please share.