The difference between 64 and 20 is: 
The difference between 57 and 43 is: 
The difference between 61 and 20 is: 
The difference between 64 and 20 is: 
The difference between 74 and 20 is: 
The difference between 64 and 50 is: 
The difference between 70 and 26 is: 
The difference between 64 and 20 is: 