The difference between 31 and 16 is: 
The difference between 61 and 46 is: 
The difference between 38 and 16 is: 
The difference between 31 and 10 is: 
The difference between 31 and 16 is: 
The difference between 31 and 16 is: 
The difference between 38 and 13 is: 
The difference between 31 and 16 is: 