Reasoning & answer: CoT: Instead of $5 each, a book costs $5 - $0.5 = $4.5 each. Sheryll paid $4.5 / book x 10 books = $45.
The answer: 45
Question: In a bookstore, a book costs $5. When Sheryll bought 10 books, she was given a discount of $0.5 each. How much did Sheryll pay in all?

Reasoning & answer: CoT: Housesitting = 15 * 10 = 150. Dog walking = 22 * 3 = 66. Total earned is 150 + 66 = $216.
The answer: 216
Question: Charles can earn $15 per hour when he housesits and $22 per hour when he walks a dog. If he housesits for 10 hours and walks 3 dogs, how many dollars will Charles earn?

Reasoning & answer: CoT: It takes him 2 * 49 = 98 hours to go from knowing how to play to proficient. So he spends 98 + 2 = 100 hours combined on those. So it takes him 100 * 100 = 10,000 hours to become a master from proficient. So the total time was 100 + 10000 = 10,100 hours.
The answer: 10100
Question: James wants to learn to become a chess grandmaster. It takes 2 hours to learn the rules. It then takes him 49 times that long to get a level of proficiency to start playing in local tournaments. After that, he devotes his life to chess and spends 100 times as much as the combined time to get proficient to becoming a master. How much total time did he spend?

Reasoning & answer: CoT: Randy has 20 12 = 8 years until he is 20. He must practice 10,000 hours / 8 years = 1,250 hours a year to become an expert. There are 52 weeks in a year 2 weeks of vacation Randy plans to take = 50 weeks of practice for Randy. Randy will practice Monday Friday, which is 5 days a week, so 50 weeks x 5 days = 250 days of practice each year. Randy will need to practice 1250 hours / 250 days = 5 hours each day.
The answer: 5
Question:
Randy just turned 12 and started playing the piano. His friend Sheila told him about the 10,000-hour rule which says, after 10,000 hours of practice, you become an expert or master in your field. If Randy wants to become a piano expert before he is 20, how many hours a day will he need to practice if he practices every day, Monday Friday, and takes two weeks off for vacation each year?