Q: Adam and Tom are brothers. Adam is 8 years old and Tom is 12 years old. In how many years will their combined age be 44 years old?
A: At present, the two brothers have a combined age of 8 + 12 = 20 years old. Therefore, 1 year means an increase in the sum of their ages by 1 * 2 = 2 years. Adam and Tom need a total of 44 - 20 = 24 more years to be 44 years old together. So both brothers will be 44 years old together after 24 / 2 = 12 years. The answer is 12.
Question: Harrison buys a regular croissant on Saturdays for $3.50 and an almond croissant for $5.50 on Sundays. How much does he spend on croissants in a year?
Answer: He buys a plain croissant for $3.50 and an almond croissant for $5.50 for a total of $3.50 + $5.50 = $9.00 on pastries per weekend. In one year, which is 52 weeks, he spends 52 * $9 = $468.00 on pastries. The answer is 468.
[Question]Marcus has received a commission for as many paintings as possible. Marcus plans out his drawings so that his client can receive some of the paintings as soon as possible but it is still going to take a long time. On the first day, he paints 2 paintings. He then paints every day and each day, he paints twice as many paintings as he painted the day before. If he paints for 5 days, how many paintings will he have painted in total?
[Answer]If Marcus creates 2 paintings on the first day, then he can paint 2 paintings * 2 = 4 paintings on the 2nd day. So he paints 4 paintings * 2 = 8 paintings on the 3rd day. He then paints 8 paintings * 2 = 16 paintings on the 4th day. And finally paints 16 paintings * 2 = 32 paintings on the 5th day. Marcus therefore has painted a total of 2 + 4 + 8 + 16 + 32 = 62 paintings. The answer is 62.
Q: If it takes 10 people 10 days to shovel 10,000 pounds of coal, how many days will it take half of these ten people to shovel 40,000 pounds of coal?
A: The 10 people shovel 10,000 pounds per 10 days, or 10,000 / 10 = 1000 pounds per day per 10 people. And 1000 pounds per day per 10 people is 1000 / 10 = 100 pounds per day per person. Half of ten people is 10 / 2 = 5 people. At 100 pounds per day per person, 5 people can shovel 5 * 100 = 500 pounds per day. Therefore, for 5 people to shovel 40,000 pounds, it will take 40,000 / 500 = 80 days. The answer is 80.
Question: A farmer is selling ducks and chickens at the market. He sells ducks for $10 and chickens for $8. He sells 5 chickens and some ducks. He then spends half his earnings on a new wheelbarrow. After buying it, someone sees it and agrees to pay the farmer double what the farmer paid and the farmer earns another $60. How many ducks did the farmer sell?
Answer: The wheelbarrow cost $30 because 60 / 2 = 30. The farmer earned $60 from selling fowl because 30 / (1 / 2) = 60. The farmer earned $40 selling chickens because 5 x 8 = 40. The farmer earned $20 selling ducks because 60 - 40 = 20. The farmer sold 2 ducks because 20 / 10 = 2. The answer is 2.
Q: Ivy drinks 2.5 liters of water each day. How many bottles of 2-liter water should Ivy buy for her 4 days consumption?
A:

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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For 4 days, Ivy consumes 2.5 x 4 = 10 liters of water. So Ivy should buy 10 / 2 = 5 bottles of 2 - liter water. The answer is 5.