Skip to content # Coins in Twoland

## Activity Guide

# This guide includes a set of problems as well as notes for teachers.

Sucker, Joshua. (2020). Coins in Twoland. In S. Kohli (Ed.), Math Circle Activity Database. American Institute of Mathematics. https://mathcircles.org/activity/coins-in-twoland/

Contributor(s): Joshua Zucker

Math Circles: MTC Network

- Activity Description
- Topics Covered
- Session Styles
- Mathematical Practices

In Twoland, the only money is coins with value 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, and so on. How many ways can change be given, following Twoland’s strict rules? In this whimsical session, participants will practice precision and organizational skills.
This session is also suitable for student math circles and the classroom.