The difference between 67 and 15 is: 
The difference between 58 and 16 is: 
The difference between 66 and 15 is: 
The difference between 67 and 15 is: 
The difference between 27 and 15 is: 
The difference between 67 and 45 is: 
The difference between 71 and 19 is: 
The difference between 67 and 15 is: 