The difference between 77 and 31 is: 
The difference between 64 and 40 is: 
The difference between 77 and 31 is: 
The difference between 77 and 33 is: 
The difference between 47 and 31 is: 
The difference between 77 and 31 is: 
The difference between 82 and 36 is: 
The difference between 77 and 31 is: 