A magician explains what parity is after using it to do a magic trick.

Numbers 10 and 6 discover the joys of being 16. As the number 16, they impress number 4 as they show all the ways they can be a square.

The kids need to solve equations where they need to take fractions of whole numbers.

Sheldon agrees to teach fractions to Missy and uses a pie analogy to explain them.

What is the "best" number? There's only one according to Sheldon! In this clip, Sheldon explains what the best number is and why it is the best number.