The Mystery of the Mixed-Up Multiples

Subject: Math
Topic: Factors & Multiples

A ball is placed under one of four cups and the cups are shuffled around quickly. Choose the cup marked with the number that does not belong with the rest of the group to uncover the hidden ball. You may choose to look at a hint which will reveal what number the incorrect cups are a multiple of. In part two, the cups are replaced by cards, but the challenge remains the same.