The difference between 33 and 18 is: 
The difference between 41 and 24 is: 
The difference between 39 and 18 is: 
The difference between 33 and 12 is: 
The difference between 23 and 18 is: 
The difference between 33 and 28 is: 
The difference between 35 and 10 is: 
The difference between 33 and 18 is: 