The difference between 91 and 56 is: 
The difference between 99 and 34 is: 
The difference between 99 and 56 is: 
The difference between 91 and 50 is: 
The difference between 91 and 56 is: 
The difference between 91 and 66 is: 
The difference between 96 and 51 is: 
The difference between 91 and 56 is: 