He spent 8 comics $4 / comic = $32 on comics. Raul has $87 - $32 = $55 left.
The answer: 55
Reverse engineering the question: Raul had $87 to spare so he decided to go to the bookshop. Raul bought 8 comics, each of which cost $4. How much money does Raul have left?
Reasoning and answer: If Nora prices each muffin at two dollars, she will sell 1 pack for 2 * 4 = 8 dollars. Since there are 3 packs to a case, the case will be sold for 3 * 8 = 24 dollars. It therefore means that she needs to sell 120 / 24 = 5 cases of muffins.
The answer: 5
What was the question?
Question: Nora is selling muffins to raise $120 for an upcoming school trip. She has packaged the muffins in cases. Each case has three packs of muffins. Each pack has four muffins. If she prices each muffin at two dollars, how many cases of muffins must she sell to raise enough money for the trip?
In the first month he can run 3 miles. In the second month he can run 6 miles because 3 x 2 = 6. In the third month he can run 12 miles because 6 x 2 = 12. In fourth month he can run 24 miles because 12 x 2 = 24. In fifth month he can run 48 miles because 24 x 2 = 48. He needs to start training 5 months ahead of time because 24 < 26.3 and 48>26.3.
The answer: 5
Reverse engineering the question: Tomas is hoping to run a marathon next year, which is 26.3 miles. He knows that each month he trains, he can run twice as far as the month before. If he can run 3 miles during the first month of training, how many total months before the marathon should he start training to ensure he can run far enough?
Reasoning and answer: Mrs. Brown's $50 bills amount to $50 x 3 = $150. Her $10 bills amount to $10 x 2 = $20. So Mrs. Brown's utility bills cost $150 + $20 = $170.
The answer: 170
What was the question?
Question: Mrs. Brown paid her utility bills with 3 $50 bills and 2 $10 bills. How much are her utility bills?
With the price of each doll at $4, this means he has saved a total of 15 * 4 = $60. When the price is lowered to $3 each, he can now purchase 60 / 3 = 20 dolls.
The answer: 20
Reverse engineering the question: Daniel collects Russian dolls that normally cost $4 each. He saves enough money to buy 15 Russian dolls. However, the price suddenly drops to $3 each. How many Russian dolls can he buy now at the discounted price, given his savings?
He writes each friend 3 * 2 = 6 pages a week. So he writes 6 * 2 = 12 pages every week. That means he writes 12 * 52 = 624 pages a year.
The answer: 624
Reverse engineering the question:
James writes a 3-page letter to 2 different friends twice a week. How many pages does he write a year?