The difference between 50 and 50 is: 
The difference between 53 and 45 is: 
The difference between 53 and 50 is: 
The difference between 50 and 50 is: 
The difference between 70 and 50 is: 
The difference between 50 and 30 is: 
The difference between 51 and 52 is: 
The difference between 50 and 50 is: 