Exercise on the common math operations

[tekkac]

Description

The common library contains predefined functions to handle common math operations.
Such as <, <=, > 0, range checks, absolute value, felt division.
Provide an exercise to learn how to use those functions.

Resource:

• https://perama-v.github.io/cairo/examples/math/

Acceptance criteria

• The exercise showcase math common library functions
• The contract compiles and tests pass
• An exercise patch is generated

[harrisonstark]

Going to work on this as a part of an assignment for a Software Engineering class, plan to make a pull request some time tonight.