Question: Each week, Paul has 2 hours of homework on weeknights and 5 hours for the entire weekend. This week Paul has practice 2 nights out of the week and can't do any homework those nights. How many hours of homework does he have to average for the other nights to get his week's homework done?
Answer: Paul has 10 hours of homework from weekdays because 2 x 5 = 10. He has 15 total hours because 5 + 10 = 15. He has 5 days to do his homework because 7 - 2 = 5. He needs to do 3 hours a night because 15 / 5 = 3. The answer is 3.
[Question]There are 19 students in the 3rd grade and twice that number in the 4th grade. There are 10 boys and 19 girls in the 2nd grade. How many students are there in total?
[Answer]In the third grade, there are 19 students. In the fourth grade, there are 2 × 19 = 38 students. Counting the boys and girls in the second grade, there are 10 + 19 = 29. There are 19 + 38 + 29 = 86 students in total. The answer is 86.
Q: Johnny is buying planks of wood to build some tables. Each table needs a plank of wood for each of the legs and 5 planks of wood for the surface. If Johnny wants to build 5 tables, how many planks of wood does he need?
A: Each table needs 1 plank of wood * 4 legs = 4 planks of wood for the legs. This means each table needs 4 planks of wood for legs + 5 planks of wood for the surface = 9 planks of wood. To build 5 tables, Johnny will therefore need 9 planks of wood * 5 tables = 45 planks of wood. The answer is 45.
Question: Bernie has a collection of 18 unique postcards. He decided to sell half his collection for $15 per postcard. After he has successfully sold his postcards he decided to spend all the earned money to buy new postcards for $5 each. How many postcards does Bernie have after all his transactions?
Answer: Half of Bernie's collection means 18 * 0.5 = 9 postcards. So he was able to sell 9 postcards for 9 * 15 = $135. He decided to spend all of his money on new postcards for $5 each, so he was able to buy 135 / 5 = 27 new postcards. This means Bernie has 9 + 27 = 36 postcards after all. The answer is 36.
[Question]Mark is 7 years older than Amy, who is 15. How old will Mark be in 5 years?
[Answer]Mark is 15 years + 7 years = 22 years old. In 5 years, he will be 22 years + 5 years = 27 years old. The answer is 27.
[Question]Nancy takes 3 antacids per day when she eats Indian food, 2 antacids per day when she eats Mexican food, and 1 antacid per day otherwise. If Nancy eats Indian three times a week and Mexican twice a week, how many antacids does she take per month?
[Answer]

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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First find the total number of antacids Nancy takes after eating Indian food per week: 3 antacids / day * 3 days / week = 9 antacids / week. Then find the total number of antacids Nancy takes after eating Mexican food per week: 2 antacids / day * 2 days / week = 4 antacids / week. Then find the number of days she doesn't eat Indian food or Mexican food: 7 days / week - 3 days / week - 2 days / week = 2 days / week. Then find the total number of antacids Nancy takes per week: 9 antacids / week + 4 antacids / week + 2 antacids / week = 15 antacids / week. Then multiply her weekly antacid consumption by the number of weeks per month to find her monthly consumption: 15 antacids / week * 4 week / month = 60 antacids / month. The answer is 60.