Q: What is 37 minus 15? A: 
Q: What is 87 minus 86? A: 
Q: What is 39 minus 15? A: 
Q: What is 37 minus 14? A: 
Q: What is 87 minus 15? A: 
Q: What is 37 minus 15? A: 
Q: What is 40 minus 18? A: 
Q: What is 37 minus 15? A: 