The difference between 39 and 28 is: 
The difference between 74 and 33 is: 
The difference between 39 and 28 is: 
The difference between 39 and 23 is: 
The difference between 69 and 28 is: 
The difference between 39 and 18 is: 
The difference between 40 and 29 is: 
The difference between 39 and 28 is: 