The difference between 63 and 20 is: 
The difference between 65 and 51 is: 
The difference between 62 and 20 is: 
The difference between 63 and 21 is: 
The difference between 63 and 20 is: 
The difference between 63 and 20 is: 
The difference between 70 and 27 is: 
The difference between 63 and 20 is: 