The difference between 89 and 15 is: 
The difference between 74 and 17 is: 
The difference between 86 and 15 is: 
The difference between 89 and 16 is: 
The difference between 39 and 15 is: 
The difference between 89 and 55 is: 
The difference between 91 and 17 is: 
The difference between 89 and 15 is: 