1. Abundant, Deficient, Perfect.

2. Census taker.

3. Euclidean algorithm.

4. Factoring.

5. Mad Minute (addition, subtraction).

6. Mad Minute (multiplication).

7. Palindrome Conjecture.

8. Pet Store 1.

9. Pet Store 2.

10. Pet Store 3.

11. Spinner Game.

12. Tower of Hanoi.