The difference between 54 and 15 is: 
The difference between 30 and 13 is: 
The difference between 57 and 15 is: 
The difference between 54 and 12 is: 
The difference between 74 and 15 is: 
The difference between 54 and 45 is: 
The difference between 59 and 10 is: 
The difference between 54 and 15 is: 