## Prepare a Presentation

## Work Time

# Prepare a Presentation

Share your results with a partner. Do you agree about which of the tricks always result in the original number?

- With your partner, prepare a presentation about why you think certain tricks always work and others do not.

# Challenge Problem

- Write a trick that always results in the original number, no matter what number you start with.
- Try it on another student. Ask them whether or not they ended up with the same number they started with.