[Question]Jessica just got her driving permit. She must complete 50 hours of driving with a parent to get her driver’s license. It takes 20 minutes to drive to school. If she drives to and from school every day, how many school days will it take Jessica to meet the 50-hour driving requirement?
[Answer]Jessica will drive 20 minutes, twice every school day (to and from school), so 20 minutes x 2 trips = 40 minutes each day. There are 60 minutes in 1 hour, so 50 hours of driving x 60 minutes / hour = 3,000 minutes. If you take the 3,000 minutes she needs to drive / 40 minutes driving each day = 75 school days to drive 50 hours. The answer is 75.
Q: Paul is a chicken trader. One week he had 80 chickens in total to sell at the market. Before he left the farm, he sold his neighbor 12 chickens. At the gate, before the market opens, he got a quick customer and sold another 25 chickens. How many chickens was Paul left with to sell at the market?
A: Before the market opened, Paul sold 12 + 25 = 37 chickens. So he had 80 - 37 = 43 chickens left to sell at the market. The answer is 43.
Question: Rockefeller Army Base has 3000 more than twice as many guns as Grenada Army Base, 400 less than thrice as many war tractors as Grenada Army Base, and 30 times as many soldier uniforms as Grenada Army Base reserved for its national protection. How many total war supplies does Rockefeller have if Grenada's war supplies are equally divided among the 6000 war supplies they have in total?
Answer: For each component, Grenada Army Base has 6000 / 3 = 2000 each of guns, war tractors, and soldier uniforms. Rockefeller Army Base has 3000 + 2 * 2000 = 7000 guns. Rockefeller Army Base has 3 * 2000 - 400 = 5600 war tractors. Rockefeller Army Base has 30 * 2000 = 60000 soldier uniforms. The total war supplies Rockefeller Army Base has reserved are 60000 + 5600 + 7000 = 72600 war supplies for its national protection. The answer is 72600.
[Question]Three years ago, Rosie purchased an art piece for $4000. The same art piece will be three times as much in another three years. How much money will the art piece have increased by?
[Answer]If the art piece was bought at $4000, and its price in three years will be three times its buying price, it will be worth 3 * $4000 = $12000 in another three years. The price of the art piece will increase by $12000 - $4000 = $8000. The answer is 8000.
Q: Ginger owns a flower shop, where she sells roses, lilacs, and gardenias. On Tuesday, she sold three times more roses than lilacs, and half as many gardenias as lilacs. If she sold 10 lilacs, what is the total number of flowers sold on Tuesday?
A: With 10 lilacs sold, three times more roses than lilacs is 3 * 10 = 30 roses. Half as many gardenias as lilacs is 10 / 2 = 5 gardenias. In total, there were 10 + 30 + 5 = 45 flowers sold on Tuesday. The answer is 45.
Question: Dan's skateboarding helmet has ten more craters than Daniel's ski helmet. Rin's snorkel helmet has 15 more craters than Dan's and Daniel's helmets combined. If Rin's helmet has 75 craters, how many craters are in Dan's helmet?
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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If Rin's snorkel helmet has 75 craters, then Dan's and Daniel's helmets combined have 75 - 15 = 60 craters. Let's assume Dan's helmet has C craters. Since Dan's skateboarding helmet has ten more craters than Daniel's ski helmet, the total number of craters their helmets have is C + (C - 10) = 60. 2C = 60 + 10. The total number of craters that Dan's helmet has is C = 70 / 2. Dan's skateboarding helmet has 35 craters. The answer is 35.