The difference between 56 and 36 is: 
The difference between 71 and 31 is: 
The difference between 57 and 36 is: 
The difference between 56 and 30 is: 
The difference between 56 and 36 is: 
The difference between 56 and 16 is: 
The difference between 51 and 35 is: 
The difference between 56 and 36 is: 