The difference between 60 and 21 is: 
The difference between 70 and 20 is: 
The difference between 67 and 21 is: 
The difference between 60 and 20 is: 
The difference between 40 and 21 is: 
The difference between 60 and 11 is: 
The difference between 69 and 20 is: 
The difference between 60 and 21 is: 