Q: How much is 77 minus 23? A: 
Q: How much is 79 minus 13? A: 
Q: How much is 76 minus 23? A: 
Q: How much is 77 minus 24? A: 
Q: How much is 57 minus 23? A: 
Q: How much is 77 minus 43? A: 
Q: How much is 82 minus 28? A: 
Q: How much is 77 minus 23? A: 