Q: What is 67 minus 67? A: 
Q: What is 52 minus 16? A: 
Q: What is 69 minus 67? A: 
Q: What is 67 minus 66? A: 
Q: What is 77 minus 67? A: 
Q: What is 67 minus 27? A: 
Q: What is 62 minus 63? A: 
Q: What is 67 minus 67? A: 