Q: How much is 64 minus 16? A: 
Q: How much is 51 minus 11? A: 
Q: How much is 67 minus 16? A: 
Q: How much is 64 minus 13? A: 
Q: How much is 64 minus 16? A: 
Q: How much is 64 minus 16? A: 
Q: How much is 69 minus 11? A: 
Q: How much is 64 minus 16? A: 