It cost 250 * .3 = $75 more than his old barbell. So it cost 250 + 75 = $325.
The answer: 325
Reverse engineering the question: James decides to buy himself a new barbell. It cost 30% more than his old $250 barbell. How much did it cost?
Reasoning and answer: Joan is given 1 x 60 = 60 minutes to answer the English exam. So Joan will spend 60 / 30 = 2 minutes for each English question. She is given 1.5 x 60 = 90 minutes to answer the Math exam. So, she will spend 90 / 15 = 6 minutes for each Math question. Hence, Joan has 6 - 2 = 4 minutes more for answering each question in Math than in English.
The answer: 4
What was the question?
Question: Joan is answering English and Math exams with 30 and 15 questions, respectively. The English exam is to be completed in 1 hour and the Math exam in 1.5 hours. If Joan wants to spend an equal amount of time on each question, how many more minutes does she have in answering each question on the Math exam than the English exam?
Hans's party includes 12 - 2 = 10 adults and 2 children. The adults will cost 3 * 10 = $30 for the deposit. The children will cost 2 * 1 = $2 for the deposit. Thus, Hans has to pay 30 + 2 + 20 = $52 as a deposit for the restaurant reservation.
The answer: 52
Reverse engineering the question: Hans reserved a table at a fine dining restaurant for twelve people. He has to pay a deposit for the reservation, and the deposit is a flat $20 plus an extra $3 per adult but only $1 per child. Two of the people in Hans's party are his kid cousins, and the rest are adults. How many dollars does Hans have to pay as a deposit for the restaurant reservation?
Reasoning and answer: He uses it 3 * 2 = 6 times. So he pays 30 / 6 = $5.
The answer: 5
What was the question?
Question: John buys a heating pad for $30. He uses it 3 times a week for 2 weeks. How much does he spend on each use?
First let's find the number for each animal separately, 42 teeth per dog * 5 dogs = 210 teeth for dogs. Then cats total will be 30 teeth per cat * 10 cats = 300 teeth in total for cats. Finally, the number for pigs is 28 teeth per pig * 7 pigs = 196 teeth in total for pigs. So the total in all is 210 teeth + 300 teeth + 196 teeth = 706 teeth in total.
The answer: 706
Reverse engineering the question: Vann is a veterinarian. Today he is going to be doing dental cleanings only. Dogs have 42 teeth, cats have 30 teeth and pigs have 28 teeth. If he is to do 5 dogs, 10 cats and 7 pigs, how many total teeth will Vann clean today?
Roger rode for 2 miles in the morning, and then 5 times that in the evening for 5 * 2 = 10 miles ridden in the evening. In total, that means Roger rode 2 + 10 = 12 miles over the course of the day.
The answer: 12
Reverse engineering the question:
Roger rode his bike for 2 miles this morning, and then 5 times that amount in the evening. How many miles did Roger ride his bike for?