Q: How much is 77 minus 49? A: 
Q: How much is 75 minus 53? A: 
Q: How much is 79 minus 49? A: 
Q: How much is 77 minus 45? A: 
Q: How much is 57 minus 49? A: 
Q: How much is 77 minus 29? A: 
Q: How much is 79 minus 41? A: 
Q: How much is 77 minus 49? A: 