Q: What is the result of 39 minus 28? A: 
Q: What is the result of 99 minus 67? A: 
Q: What is the result of 39 minus 28? A: 
Q: What is the result of 39 minus 20? A: 
Q: What is the result of 39 minus 28? A: 
Q: What is the result of 39 minus 18? A: 
Q: What is the result of 40 minus 29? A: 
Q: What is the result of 39 minus 28? A: 