CHAMP-Week #5 Lesson

Here are the worksheets on the games we played in class together with the questions we asked, and here are the solutions to the questions.

Here is a version of the "21 Game" that you can play online: 21 Game.

If you're interested in learning more about NIM, these are some sites you can visit:

An online version of NIM with multiple piles, which you can play against the computer.
A poster explaining how binary numbers (which we learned about in previous lessons) can be used to describe the winning strategy for NIM.
Here is the Wikipedia article on NIM, which explains the winning strategy when there are multiple piles. This article is a bit technical, but you can see how binary numbers are used to describe the solution.