You can amaze your friends with a magic trick using the goblets. By following this sequence, you will be able to succeed in only three movements! It's not magic ... it's mathematical! Pedagogical side: This round uses "even" and "odd" numbers. The goal is to put the three goblets upside down in just three movements, but you have to turn two cups at a time. Since the goal is to turn all the cups upside down (an odd number) and start with a cup at the place (another even number), you have to turn an even number of cups (two) because an even number plus an odd number gives an odd number.