The difference between 71 and 37 is: 
The difference between 15 and 11 is: 
The difference between 78 and 37 is: 
The difference between 71 and 30 is: 
The difference between 81 and 37 is: 
The difference between 71 and 67 is: 
The difference between 77 and 33 is: 
The difference between 71 and 37 is: 