This math took me outtt LOL For those who are still lost like I was, this is how it started to make sense for me: We know is that both censors approved the same number of books. We are given the fraction of what was not approved. Well, just do the math to figure out the fraction of what was approved so that we can make an equation out of it. If we know 1/2 was not approved, we know 1/2 was approved. We know that 1/4 was not approved, so 3/4 was approved. That's how he got 3/4. Now, say both approved 15 books, like in the explanation. Then solve for x and y

That was a little confusing. So to be clear for question #4, in the first sentence useful deductions is the sufficient condition because it follows immediately after "when". In the sentence "any" is not being used as a sufficient condition indicator, correct?