The difference between 51 and 11 is: 
The difference between 81 and 34 is: 
The difference between 56 and 11 is: 
The difference between 51 and 10 is: 
The difference between 71 and 11 is: 
The difference between 51 and 11 is: 
The difference between 51 and 13 is: 
The difference between 51 and 11 is: 