Question: John buys 2 dozen cookies. He eats 3. How many cookies does he have left?
Answer: Step-by-step reasoning process: He got 2 * 12 = 24 cookies. So he has 24 - 3 = 21 cookies left.
So the answer is 21.

Question: The pet shop grooms dogs. It takes 30 minutes to groom a poodle. It takes half as much time to groom a terrier as it takes to groom a poodle. They do not groom cats. If the pet shop grooms 3 poodles and 8 terriers, what is the total length of time it will take, in minutes?
Answer: Step-by-step reasoning process: At a rate of 30 minutes per poodle, 3 poodles will take 3 * 30 = 90 minutes. If it takes half as much time to groom a terrier as it takes to groom a poodle, it takes 30 / 2 = 15 minutes per terrier. At a rate of 15 minutes per terrier, 8 terriers will take 120 minutes. Thus, in total, it will take the pet shop 90 + 120 = 210 minutes to groom 3 poodles and 8 terriers.
So the answer is 210.

Question: Lucy is listening to her favorite album while jumping rope. She can jump the rope 1 time per second. If the album's songs are all 3.5 minutes long and there are 10 songs, how many times will she jump rope?
Answer: Step-by-step reasoning process: She can jump her rope 60 times a minute because 60 x 1 = 60. The album is 35 minutes long because 10 x 3.5 = 35. She will jump her rope 2100 times during the album because 35 x 60 = 2100.
So the answer is 2100.

Question: Harry is joining a marathon that's why he practices and varies his workouts from day to day. He ran 10 meters per hour on Monday. From Tuesday to Thursday he ran 50% faster than on Monday. Then on Friday, he ran 60% faster than he ran on Thursday. How fast did Harry run on Friday?
Answer:
Step-by-step reasoning process: Harry ran 10 x 50 / 100 = 5 meters per hour faster on Tuesday to Wednesday. So he ran 10 + 5 = 15 meters per hour from Tuesday to Thursday. Then on Friday, he ran 15 x 60 / 100 = 9 meters per hour more. Therefore, he ran 15 + 9 = 24 meters per hour on Friday.
So the answer is 24.