The difference between 89 and 17 is: 
The difference between 77 and 45 is: 
The difference between 89 and 17 is: 
The difference between 89 and 18 is: 
The difference between 29 and 17 is: 
The difference between 89 and 37 is: 
The difference between 91 and 19 is: 
The difference between 89 and 17 is: 