Q: What is 91 minus 77? A: 
Q: What is 51 minus 42? A: 
Q: What is 99 minus 77? A: 
Q: What is 91 minus 70? A: 
Q: What is 91 minus 77? A: 
Q: What is 91 minus 37? A: 
Q: What is 95 minus 71? A: 
Q: What is 91 minus 77? A: 