The difference between 99 and 31 is: 
The difference between 95 and 73 is: 
The difference between 97 and 31 is: 
The difference between 99 and 38 is: 
The difference between 69 and 31 is: 
The difference between 99 and 21 is: 
The difference between 102 and 34 is: 
The difference between 99 and 31 is: 