The difference between 69 and 31 is: 
The difference between 45 and 18 is: 
The difference between 65 and 31 is: 
The difference between 69 and 37 is: 
The difference between 99 and 31 is: 
The difference between 69 and 21 is: 
The difference between 70 and 32 is: 
The difference between 69 and 31 is: 