The difference between 87 and 87 is: 
The difference between 64 and 42 is: 
The difference between 88 and 87 is: 
The difference between 87 and 85 is: 
The difference between 97 and 87 is: 
The difference between 87 and 47 is: 
The difference between 81 and 82 is: 
The difference between 87 and 87 is: 