The difference between 65 and 55 is: 
The difference between 91 and 68 is: 
The difference between 68 and 55 is: 
The difference between 65 and 50 is: 
The difference between 65 and 55 is: 
The difference between 65 and 55 is: 
The difference between 61 and 54 is: 
The difference between 65 and 55 is: 