Question: Four days ago, Carlos bought a bag of gummy worms. Every day he ate half of the remaining gummy worms. After eating half of the remainder on the fourth day, he now has 4 gummy worms left. How many gummy worms were in the bag when Carlos bought it?
Answer: Step-by-step reasoning process: Let G be the number of gummy worms in the bag when Carlos bought it. On the first day, he ate half the gummy worms, so he had G / 2 gummy worms. On the second day, he ate half of the remaining gummy worms, so he had G / 2 / 2 = G / 4 gummy worms. On the third day, he ate another half, so he had G / 4 / 2 = G / 8 gummy worms. On the fourth day, he ate another half and had 4 left, so he had G / 8 / 2 = G / 16 = 4 gummy worms. Thus, there were G = 4 * 16 = 64 gummy worms in the bag when Carlos bought it.
So the answer is 64.

Question: There are six peregrine falcons and 40 pigeons nesting in Malcolm's skyscraper. Each pigeon has 6 chicks. If the peregrines eat 30% of the pigeons, how many pigeons are left?
Answer: Step-by-step reasoning process: First find the total number of chicks: 40 pigeons * 6 chicks / pigeon = 240 chicks. Then add that to the number of adult pigeons to find the total number of pigeons: 240 chicks + 40 pigeons = 280 pigeons. Then multiply that number by 30% to find the number of pigeons that were eaten: 280 pigeons * 30% = 84 pigeons. Then subtract that number from the total number of pigeons to find the number that are left: 280 pigeons - 84 pigeons = 196 pigeons.
So the answer is 196.

Question: Five adults and two children go to see a movie and buy $12 worth of concessions. The total cost of their trip is $76. If each child's ticket is $7, how much, in dollars, are the adult tickets?
Answer: Step-by-step reasoning process: First take out the cost of the concessions. That leaves $76 - $12 = $64 for the movie tickets. Each child ticket costs $7, so two children's tickets cost $7 per child ticket * 2 child tickets = $14. To find the amount spent on adult tickets, subtract the cost of the children's tickets to get $64 - $14 = $50 for adult tickets. Divide $50 for adult tickets / 5 adults = $10 per adult ticket.
So the answer is 10.

Question: An NGO contracted a construction company to build 2000 houses within one year. In the first half of the year, they built the first 3/5 units of the contracted number. Due to unavoidable circumstances, the company could only build an additional 300 units by October. How many units remain from the contracted number that the company is supposed to build?
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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Step-by-step reasoning process: In the first half of the year, the company constructed 3 / 5 * 2000 = 1200 units. The number of units remaining to be built after the company built 1200 units in the first half of the year is 2000 - 1200 = 800. By October, the company built an additional 300 units, thus remaining with 800 - 300 = 500 units to be built.
So the answer is 500.