Q: What is 78 minus 66? A: 
Q: What is 84 minus 52? A: 
Q: What is 77 minus 66? A: 
Q: What is 78 minus 67? A: 
Q: What is 88 minus 66? A: 
Q: What is 78 minus 36? A: 
Q: What is 81 minus 69? A: 
Q: What is 78 minus 66? A: 