The difference between 71 and 49 is: 
The difference between 86 and 40 is: 
The difference between 79 and 49 is: 
The difference between 71 and 40 is: 
The difference between 61 and 49 is: 
The difference between 71 and 39 is: 
The difference between 75 and 43 is: 
The difference between 71 and 49 is: 