Children are tested on fractions by Bad Man.

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.

The Bad Man tests the kids' percentage skills by asking them to mark percentages off on the board.

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.