The difference between 90 and 42 is: 
The difference between 91 and 49 is: 
The difference between 97 and 42 is: 
The difference between 90 and 40 is: 
The difference between 80 and 42 is: 
The difference between 90 and 82 is: 
The difference between 98 and 40 is: 
The difference between 90 and 42 is: 