Q: What is 66 minus 15? A: 
Q: What is 67 minus 21? A: 
Q: What is 67 minus 15? A: 
Q: What is 66 minus 11? A: 
Q: What is 46 minus 15? A: 
Q: What is 66 minus 25? A: 
Q: What is 70 minus 19? A: 
Q: What is 66 minus 15? A: 