Q: What is 90 minus 81? A: 
Q: What is 69 minus 65? A: 
Q: What is 97 minus 81? A: 
Q: What is 90 minus 80? A: 
Q: What is 90 minus 81? A: 
Q: What is 90 minus 31? A: 
Q: What is 99 minus 80? A: 
Q: What is 90 minus 81? A: 