The difference between 91 and 55 is: 
The difference between 42 and 24 is: 
The difference between 97 and 55 is: 
The difference between 91 and 50 is: 
The difference between 81 and 55 is: 
The difference between 91 and 25 is: 
The difference between 97 and 51 is: 
The difference between 91 and 55 is: 