The difference between 67 and 51 is: 
The difference between 22 and 13 is: 
The difference between 64 and 51 is: 
The difference between 67 and 53 is: 
The difference between 97 and 51 is: 
The difference between 67 and 51 is: 
The difference between 71 and 55 is: 
The difference between 67 and 51 is: 