My teacher put a brain teezer out a few days ago and my class thinks it is impossible to figure out. >>There are 3 crates holding apples and oranges. 1 crate is holding apples. 1 crate is holding oranges. Another crate is holding apples and oranges. The labels for the crates have been put on the wrong crates. You are allowed to open one crate. Which crate do you open to figure out what the other crates have in them? You must only open 1.<< I'm convinced this is impossible and my teacher is just making a joke out of it.