The difference between 78 and 21 is: 
The difference between 95 and 55 is: 
The difference between 78 and 21 is: 
The difference between 78 and 27 is: 
The difference between 98 and 21 is: 
The difference between 78 and 51 is: 
The difference between 85 and 28 is: 
The difference between 78 and 21 is: 