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.

Barry doesn't understand his homework assignment about fractions and asks his father to help him. His father tries to explain fractions to him using toy trains as a visual aid.

The CyberSquad finds that no one is on floor -3, and Motherboard cannot track their location. Jackie guesses that they are on floor -5, the Grand Ballroom, so Digit tries to determine which direction to go. Initially, he thinks that they should go up, but that turns out to be incorrect. Jackie, Inez, and Matt explain to Digit why -5 is less than -3.

The CyberSquad helps Shari make a new batch of Cosmic crumpets. Since they're out of dragon drool, they venture out to collect some. In order to make fewer trips to the dragon, they convert the needed six 1/4 cups into 1 cup and two 1/4 cups so that they only need to make three trips. While the crumpets are baking, Shari presents the CyberSquad with two different ways of writing out fractions.

Shari burned an important batch of magic crumpets and needs to make a new batch of 8. However, her recipe will only make 4 crumpets. Matt helps her determine the quantity of each ingredient she needs to use in order to make 8 batches.