The difference between 50 and 42 is: 
The difference between 91 and 61 is: 
The difference between 55 and 42 is: 
The difference between 50 and 40 is: 
The difference between 70 and 42 is: 
The difference between 50 and 12 is: 
The difference between 58 and 40 is: 
The difference between 50 and 42 is: 