The difference between 41 and 28 is: 
The difference between 47 and 45 is: 
The difference between 49 and 28 is: 
The difference between 41 and 20 is: 
The difference between 91 and 28 is: 
The difference between 41 and 18 is: 
The difference between 49 and 26 is: 
The difference between 41 and 28 is: 