I want to give change for a dollar, using only coins. How many different ways are there to do that?
Using only coins, there are 293 ways to make change for one dollar. 

The coins included in this calculation are:
 
⦁	quarter
⦁	dime
⦁	nickel
⦁	penny
⦁	half dollar 
⦁	one-dollar coin

The number of combinations using only the most commonly used coins, excluding the one-dollar coin and the half-dollar coin, is 242. 

The coins included in this calculation are:

⦁	quarter
⦁	dime
⦁	nickel
⦁	penny