All the audience has to do is try and match up pairs. E.g. Ask them a question, whoever gets it right can choose two numbers. If they match, they get an extra point, if they don't then click the number again to hide them. Good test of memory skills this one.
- The person operating the quiz needs to pay attention and make sure they cover the unmatched areas back up again. As the uncovered blocks go back in order, they also need to remember which numbers they have uncovered.
- It's helpful to go over the story of the ten plagues beforehand so that you know what the ten plagues are, rather than trying to guess as the quiz is being played.