read your book
seriously
read it
not look at the questions and answers, but all those pages between hw sets, those are actually useful things
now try the hw and see how it goes
h:
if its a decent book for the subject 90% of your questions are answered in those pages that no student ever even looks at

what kind of q's are you missing?
subject matter, still doing set theory?

other option is to find the hot girl in class and copy off of her, worked for me for 3 yrs :dunno: