The difference between 71 and 21 is: 
The difference between 94 and 19 is: 
The difference between 75 and 21 is: 
The difference between 71 and 20 is: 
The difference between 71 and 21 is: 
The difference between 71 and 21 is: 
The difference between 71 and 23 is: 
The difference between 71 and 21 is: 