I would really really like some help with this please. I know that since 98=3 (mod 5) and 103=3 (mod 5) we have 98^150=3^150 (mod 5) and 103^151=3^151 (mod 5). I really don't have a clue where to go from here. I am having a pretty difficult time in my discrete math so please explain things clearly so that I will be able to understand what the heck is going on! Thanks so much for your help