Question

Tammy wants to get change for $1. The only coins she can get are half dollars, quarters, and nickels. How many diferent ways can she get $1 using only these coins?

Answer 1

9 ways

Explanation:

Using H, Q, N to represent half-dollars, quarters, and nickels, Tammy can get her change any of these ways:

1. HH
2. HQQ
3. HQNNNNN
4. HNNNNN.NNNNN
5. QQQQ
6. QQQNNNNN
7. QQNNNNN.NNNNN
8. QNNNNN.NNNNN.NNNNN
9. NNNNN.NNNNN.NNNNN.NNNNN