The difference between 43 and 41 is: 
The difference between 99 and 90 is: 
The difference between 42 and 41 is: 
The difference between 43 and 40 is: 
The difference between 83 and 41 is: 
The difference between 43 and 21 is: 
The difference between 51 and 49 is: 
The difference between 43 and 41 is: 