The difference between 91 and 33 is: 
The difference between 85 and 40 is: 
The difference between 96 and 33 is: 
The difference between 91 and 30 is: 
The difference between 71 and 33 is: 
The difference between 91 and 83 is: 
The difference between 99 and 31 is: 
The difference between 91 and 33 is: 