The difference between 67 and 20 is: 
The difference between 59 and 15 is: 
The difference between 66 and 20 is: 
The difference between 67 and 21 is: 
The difference between 87 and 20 is: 
The difference between 67 and 50 is: 
The difference between 70 and 23 is: 
The difference between 67 and 20 is: 