The difference between 66 and 56 is: 
The difference between 77 and 50 is: 
The difference between 69 and 56 is: 
The difference between 66 and 50 is: 
The difference between 76 and 56 is: 
The difference between 66 and 16 is: 
The difference between 61 and 59 is: 
The difference between 66 and 56 is: 