Answer the following question.
John has started at a job he works every day 10 days ago. So far, he's made $250. How many more days must John work before he makes twice this amount, assuming he makes the same amount every day?
Step-by-step reasoning process: John has made $250 in 10 days, so this means he makes $250 / 10 = 25 dollars a day. Since John wants to make double his current amount, this means he wants to make 250 * 2 = 500 dollars. This means John needs to work 500 / 25 = 20 days in total to make 500. As John has already worked 10 days, this means he needs to work 20 - 10 = 10 more days to make his goal.
The answer is 10.

Answer the following question.
Jo reads at a steady pace. Her current book has 210 pages. Now, she is at page 90. An hour ago, she was at page 60. For how many hours will she be reading the book?
Step-by-step reasoning process: She reads 90 - 60 = 30 pages in an hour. She needs to read 210 - 90 = 120 more pages. For an additional 120 pages, she will need 120 / 30 = 4 hours.
The answer is 4.

Answer the following question.
Daniel has 5 jars of juice containing 2 liters each. He wants to serve a full glass of juice to each person at a party. He knows that each glass can hold up to 250 milliliters of juice. How many full glasses can he give?
Step-by-step reasoning process: The total liters of juice he has is 5 jars x 2 liters / jar = 10 liters of juice. Then he needs to convert this amount to milliliters: 10 liters x 1000 milliliters / liter = 10,000 milliliters. He can fill up to 10,000 ml / 250 ml / glass = 40 glasses.
The answer is 40.

Answer the following question.
At his craftwork store, Howard has a collection of 70 wooden bowls where he rewards two to his customers for every 10 they buy. If he had 20 customers that day, half of whom bought 20 bowls each, calculate the number of bowls remaining in the rewards collection.
Step-by-step reasoning process: Half of the 20 customers, which is 1 / 2 * 20 = 10 bought 20 bowls each, receiving 2 for every 10. The total number of reward bowls each customer who bought 20 bowls received is 2 + 2 = 4. If 10 customers bought 20 bowls, Howard gave away 4 * 10 = 40 bowls as rewards. The total number of reward bowls that remained is 70 - 40 = 30.
The answer is 30.