The difference between 51 and 40 is: 
The difference between 52 and 34 is: 
The difference between 59 and 40 is: 
The difference between 51 and 40 is: 
The difference between 51 and 40 is: 
The difference between 51 and 40 is: 
The difference between 60 and 49 is: 
The difference between 51 and 40 is: 