Q: What is 99 minus 31? A: 
Q: What is 63 minus 48? A: 
Q: What is 94 minus 31? A: 
Q: What is 99 minus 35? A: 
Q: What is 59 minus 31? A: 
Q: What is 99 minus 21? A: 
Q: What is 104 minus 36? A: 
Q: What is 99 minus 31? A: 