The difference between 42 and 31 is: 
The difference between 70 and 32 is: 
The difference between 42 and 31 is: 
The difference between 42 and 31 is: 
The difference between 52 and 31 is: 
The difference between 42 and 31 is: 
The difference between 50 and 39 is: 
The difference between 42 and 31 is: 