Q: How much is 77 minus 31? A: 
Q: How much is 39 minus 35? A: 
Q: How much is 73 minus 31? A: 
Q: How much is 77 minus 31? A: 
Q: How much is 57 minus 31? A: 
Q: How much is 77 minus 51? A: 
Q: How much is 82 minus 36? A: 
Q: How much is 77 minus 31? A: 