The difference between 63 and 31 is: 
The difference between 74 and 34 is: 
The difference between 66 and 31 is: 
The difference between 63 and 30 is: 
The difference between 83 and 31 is: 
The difference between 63 and 11 is: 
The difference between 70 and 38 is: 
The difference between 63 and 31 is: 