The difference between 66 and 21 is: 
The difference between 69 and 25 is: 
The difference between 63 and 21 is: 
The difference between 66 and 24 is: 
The difference between 66 and 21 is: 
The difference between 66 and 11 is: 
The difference between 70 and 25 is: 
The difference between 66 and 21 is: 