The difference between 40 and 25 is: 
The difference between 33 and 23 is: 
The difference between 49 and 25 is: 
The difference between 40 and 20 is: 
The difference between 60 and 25 is: 
The difference between 40 and 35 is: 
The difference between 49 and 24 is: 
The difference between 40 and 25 is: 