The difference between 98 and 91 is: 
The difference between 57 and 28 is: 
The difference between 99 and 91 is: 
The difference between 98 and 91 is: 
The difference between 98 and 91 is: 
The difference between 98 and 61 is: 
The difference between 101 and 94 is: 
The difference between 98 and 91 is: 