The difference between 36 and 31 is: 
The difference between 58 and 34 is: 
The difference between 39 and 31 is: 
The difference between 36 and 35 is: 
The difference between 56 and 31 is: 
The difference between 36 and 21 is: 
The difference between 43 and 38 is: 
The difference between 36 and 31 is: 