The CyberSquad needs to power their ship's motor to stop Hacker. To get the motor started, they need to draw power from a crystal that has between 65% and 85% orange stripes; otherwise, the motor will not start or will burn out. They count the number of orange stripes on each crystal to determine the fraction of stripes that are orange. Then, they convert each fraction into a percent to determine which crystal they should use to power the motor.

The CyberSquad works together to find the power crystal with the most orange and therefore the most power. They use their math skills to compare the crystals in order to open the door.

Sad man teaches about pie fractions and how to read them. Bad man takes the children on a practice run on fraction amounts in a pie chart. A special song is sung to guide the lesson.

Smilla compares numbers to human life and defines natural numbers, negative numbers, and fractions.

Ganesh Pai explains the origin of irrational numbers. She details the proof Hippasus used to determine that some square roots were irrational numbers.