Q: How much is 99 minus 31? A: 
Q: How much is 77 minus 61? A: 
Q: How much is 99 minus 31? A: 
Q: How much is 99 minus 33? A: 
Q: How much is 89 minus 31? A: 
Q: How much is 99 minus 31? A: 
Q: How much is 104 minus 36? A: 
Q: How much is 99 minus 31? A: 