Question: Tom invites his parents and 3 siblings to his house. They each eat 3 times a day. How many plates do Tom and his guests use while they are there for the 4 days if each person uses 2 plates per meal?
Answer: Step-by-step reasoning process: There were 1 + 2 + 3 = 6 people at the house. That means they use 6 * 2 = 12 plates per meal. So they use 12 * 3 = 36 plates per day. That means they use 36 * 4 = 144 plates for the visit.
So the answer is 144.

Question: A watermelon stand sold 46 watermelons. Seventeen customers bought one melon, three customers bought three melons, and the rest bought two melons. How many customers bought two watermelons?
Answer: Step-by-step reasoning process: The customers that bought one watermelon bought 1 * 17 = 17 melons. The customers that bought three melons bought 3 * 3 = 9 melons. The stand sold 46 - 17 - 9 = 20 melons to customers who bought 2 melons. Thus, 20 / 2 = 10 customers bought two watermelons.
So the answer is 10.

Question: In a parking lot, there are cars and motorcycles. Each car has 5 wheels (including one spare) and each motorcycle has 2 wheels. There are 19 cars in the parking lot. Altogether all vehicles have 117 wheels. How many motorcycles are at the parking lot?
Answer: Step-by-step reasoning process: There are 19 cars at the lot, so there are 5 * 19 = 95 wheels of cars. So there are 117 - 95 = 22 wheels of motorcycles in the parking lot. Each motorcycle has 2 wheels, so that leaves us with 22 / 2 = 11 motorcycles in the parking lot.
So the answer is 11.

Question: At the bookstore, Sarah bought 6 paperback books and 4 hardback books. Her brother bought one-third as many paperback books as Sarah bought, and two times the number of hardback books that she bought. How many books did her brother buy in total?
Answer:
Step-by-step reasoning process: Her brother bought 6 / 3 = 2 paperbacks. He bought 4 * 2 = 8 hardbacks. In total he bought 2 + 8 = 10 books.
So the answer is 10.