The difference between 66 and 15 is: 
The difference between 41 and 17 is: 
The difference between 66 and 15 is: 
The difference between 66 and 12 is: 
The difference between 76 and 15 is: 
The difference between 66 and 25 is: 
The difference between 70 and 19 is: 
The difference between 66 and 15 is: 