The difference between 78 and 16 is: 
The difference between 91 and 10 is: 
The difference between 77 and 16 is: 
The difference between 78 and 15 is: 
The difference between 38 and 16 is: 
The difference between 78 and 16 is: 
The difference between 80 and 18 is: 
The difference between 78 and 16 is: 