The difference between 39 and 21 is: 
The difference between 77 and 12 is: 
The difference between 38 and 21 is: 
The difference between 39 and 27 is: 
The difference between 69 and 21 is: 
The difference between 39 and 11 is: 
The difference between 44 and 26 is: 
The difference between 39 and 21 is: 