The difference between 71 and 24 is: 
The difference between 64 and 29 is: 
The difference between 76 and 24 is: 
The difference between 71 and 20 is: 
The difference between 91 and 24 is: 
The difference between 71 and 14 is: 
The difference between 77 and 20 is: 
The difference between 71 and 24 is: 