The difference between 66 and 55 is: 
The difference between 74 and 57 is: 
The difference between 66 and 55 is: 
The difference between 66 and 51 is: 
The difference between 76 and 55 is: 
The difference between 66 and 15 is: 
The difference between 70 and 59 is: 
The difference between 66 and 55 is: 