The difference between 66 and 30 is: 
The difference between 24 and 10 is: 
The difference between 61 and 30 is: 
The difference between 66 and 30 is: 
The difference between 96 and 30 is: 
The difference between 66 and 20 is: 
The difference between 72 and 36 is: 
The difference between 66 and 30 is: 