The difference between 91 and 81 is: 
The difference between 95 and 45 is: 
The difference between 98 and 81 is: 
The difference between 91 and 80 is: 
The difference between 91 and 81 is: 
The difference between 91 and 61 is: 
The difference between 91 and 84 is: 
The difference between 91 and 81 is: 