The difference between 66 and 50 is: 
The difference between 97 and 68 is: 
The difference between 65 and 50 is: 
The difference between 66 and 55 is: 
The difference between 96 and 50 is: 
The difference between 66 and 30 is: 
The difference between 71 and 55 is: 
The difference between 66 and 50 is: 