Statement 1 tells us our number is 30 greater than some multiple of 45, so our number is equal to 45q + 30, for some integer q. But 45q + 30 = 5(9q + 6), which is clearly divisible by 5, so the remainder is 0 when we divide our number by 5, and Statement 1 is sufficient, even without using any information from the question stem.

Statement 2 is not sufficient, because knowing about division by 2 and by 9 tells you nothing about division by 5 -- there's just no relationship between those things. Here our number could be 12, or it could be 30, among other possibilities, and we can get different answers to the question (in fact you can get any answer at all, between 0 and 4 inclusive).