Q: Jane had a 500 page book to read. The first half of the book Jane read with a speed of 10 pages per day, and the second half with a speed of 5 pages a day. How many days did Jane spend reading this book?
A: Half of the book means 500 / 2 = 250 pages. Reading the first half took Jane 250 / 10 = 25 days. Reading the second half of the book took Jane 250 / 5 = 50 days. So in total Jane needed 25 + 50 = 75 days to read the whole book. The answer is 75.
Question: A liter of chlorine costs $10 and is now sold at 20% off. A box of soap that costs $16 is now sold at 25% off. How much will you save if you buy 3 liters of chlorine and 5 boxes of soap?
Answer: For each liter of chlorine, I can save $10 x .20 = $2. For each box of soap, I can save $16 x .25 = $4. With the 3 liters of chlorine, I can save $2 x 3 = $6. With the 5 boxes of soap, I can save $4 x 5 = $20. Therefore, I can save a total of $6 + $20 = $26. The answer is 26.
[Question]Several birds were sitting in the branches of a crape myrtle tree. There were three times more cardinals than bluebirds, but half as many swallows as bluebirds. If there were 2 swallows, what is the total number of birds in the crape myrtle tree?
[Answer]With half as many swallows as bluebirds, there are 2 * 2 = 4 bluebirds. With three times more cardinals than bluebirds, there are 3 * 4 = 12 cardinals,. If there were 2 swallows, then the total number of birds in the crape myrtle tree is 2 + 4 + 12 = 18 birds. The answer is 18.
Q: One kilogram of tomatoes is 20% cheaper than one kilogram of cucumbers. One kilogram of cucumbers costs $5. What is the price of two kilograms of tomatoes and three kilograms of cucumbers?
A: One kilogram of tomatoes is 20 / 100 * 5 = $1 cheaper than one kilogram of cucumbers. This means that one kilogram of tomatoes costs 5 - 1 = $4. So two kilograms of tomatoes is a cost of 2 * 4 = $8. And three kilograms of cucumbers is a cost of 3 * 5 = $15. So the price for both products would be 8 + 15 = $23. The answer is 23.
Question: Laura bought 2 pairs of pants for $54 each and 4 shirts for $33 each. She gave $250 to the cashier. So how much change did she take?
Answer: 54 * 2 = $108 is the price of 2 pairs of pants. 4 * 33 = $132 is the price of 4 shirts. 108 + 132 = $240 is the total price. So the cashier gave 250 - 240 = $10 change to Laura. The answer is 10.
Q: Joel is 5 years old and his dad is 32 years old. How old will Joel be when his dad is twice as old as him?
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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The difference in age between Joel and his dad is 32 - 5 = 27 years. When you double this gap in years, you have 27 x 2 = 54. When his dad is 54, Joel will be 54 / 2 = 27 years old. The answer is 27.