The difference between 97 and 40 is: 
The difference between 53 and 41 is: 
The difference between 99 and 40 is: 
The difference between 97 and 42 is: 
The difference between 87 and 40 is: 
The difference between 97 and 20 is: 
The difference between 102 and 45 is: 
The difference between 97 and 40 is: 