Q: What is 31 minus 17? A: 
Q: What is 64 minus 51? A: 
Q: What is 38 minus 17? A: 
Q: What is 31 minus 10? A: 
Q: What is 21 minus 17? A: 
Q: What is 31 minus 27? A: 
Q: What is 36 minus 12? A: 
Q: What is 31 minus 17? A: 