The difference between 87 and 21 is: 
The difference between 35 and 10 is: 
The difference between 89 and 21 is: 
The difference between 87 and 21 is: 
The difference between 67 and 21 is: 
The difference between 87 and 41 is: 
The difference between 95 and 29 is: 
The difference between 87 and 21 is: 