The difference between 51 and 24 is: 
The difference between 68 and 30 is: 
The difference between 57 and 24 is: 
The difference between 51 and 20 is: 
The difference between 31 and 24 is: 
The difference between 51 and 14 is: 
The difference between 59 and 22 is: 
The difference between 51 and 24 is: 