The difference between 67 and 57 is: 
The difference between 87 and 71 is: 
The difference between 68 and 57 is: 
The difference between 67 and 50 is: 
The difference between 77 and 57 is: 
The difference between 67 and 37 is: 
The difference between 67 and 58 is: 
The difference between 67 and 57 is: 