The difference between 68 and 49 is: 
The difference between 52 and 51 is: 
The difference between 69 and 49 is: 
The difference between 68 and 47 is: 
The difference between 68 and 49 is: 
The difference between 68 and 19 is: 
The difference between 69 and 40 is: 
The difference between 68 and 49 is: 