HEllo everyone. I'm trying to find a counter example that will prove this false. But it may be true but i'm hoping it isn't :) For all integers a and b, if a|10b then a|10 or a|b. I said false, a = 3, b = 5. 3 is not divisible by 50. 3 is also not divisble by 10 nor 3 divisible by 5. But then i saw, p has to be true for q to be true. I have to prove q to be false, then p is also false. Its looking like this has to be true, can anyone spot a counter example? I"m not looking for an answer, but it would motivate me to keep looking for one. THanks!