The difference between 87 and 51 is: 
The difference between 88 and 28 is: 
The difference between 89 and 51 is: 
The difference between 87 and 55 is: 
The difference between 87 and 51 is: 
The difference between 87 and 61 is: 
The difference between 90 and 54 is: 
The difference between 87 and 51 is: 