The difference between 66 and 36 is: 
The difference between 21 and 19 is: 
The difference between 69 and 36 is: 
The difference between 66 and 35 is: 
The difference between 56 and 36 is: 
The difference between 66 and 46 is: 
The difference between 60 and 33 is: 
The difference between 66 and 36 is: 