The difference between 91 and 76 is: 
The difference between 16 and 11 is: 
The difference between 98 and 76 is: 
The difference between 91 and 70 is: 
The difference between 81 and 76 is: 
The difference between 91 and 56 is: 
The difference between 97 and 72 is: 
The difference between 91 and 76 is: 