The difference between 29 and 11 is: 
The difference between 63 and 51 is: 
The difference between 22 and 11 is: 
The difference between 29 and 16 is: 
The difference between 99 and 11 is: 
The difference between 29 and 11 is: 
The difference between 36 and 18 is: 
The difference between 29 and 11 is: 