The difference between 87 and 15 is: 
The difference between 47 and 46 is: 
The difference between 87 and 15 is: 
The difference between 87 and 10 is: 
The difference between 37 and 15 is: 
The difference between 87 and 55 is: 
The difference between 91 and 19 is: 
The difference between 87 and 15 is: 