The difference between 71 and 51 is: 
The difference between 92 and 16 is: 
The difference between 74 and 51 is: 
The difference between 71 and 50 is: 
The difference between 61 and 51 is: 
The difference between 71 and 31 is: 
The difference between 71 and 52 is: 
The difference between 71 and 51 is: 