If the second tallest building is half as tall as the first one's height of 100 feet, it is 100 / 2 = 50 feet tall. If the third tallest building is half as tall as the second one's height of 50 feet, it is 50 / 2 = 25 feet tall. If the fourth building is one - fifth as tall as the third one, it is 25 / 5 = 5 feet tall. Therefore, all four buildings put together would be 100 + 50 + 25 + 5 = 180 feet tall.
The answer: 180
Reverse engineering the question: The tallest building in the world is 100 feet tall. If the second tallest is half that tall, and the third tallest is half as tall as the second, and the fourth is one-fifth as tall as the third, how tall are all 4 buildings put together?


Reasoning and answer: The second stack has 7 blocks + 3 blocks = 10 blocks. The third stack has 10 blocks - 6 blocks = 4 blocks. The fourth stack has 4 blocks + 10 blocks = 14 blocks. The fifth stack has 10 blocks x 2 = 20 blocks. In total there are 7 blocks + 10 blocks + 4 blocks + 14 blocks + 20 blocks = 55 blocks.
The answer: 55
What was the question?
Question: Thomas made 4 stacks of wooden blocks. The first stack was 7 blocks tall. The second stack was 3 blocks taller than the first. The third stack was 6 blocks shorter than the second stack, and the fourth stack was 10 blocks taller than the third stack. If the fifth stack has twice as many blocks as the second stack, how many blocks did Thomas use in all?


Farrah ordered 4 boxes from Amazon containing 20 matchboxes each, a total of 4 * 20 = 80 matchboxes. If each matchbox has 300 sticks, the total number of match sticks that Farah bought is 300 * 80 = 24000.
The answer: 24000
Reverse engineering the question: Farrah ordered 4 boxes from Amazon containing 20 matchboxes each. If each matchbox has 300 sticks, calculate the total number of match sticks that Farah ordered?


Reasoning and answer: Andre had $1350 x 30 / 100 = $405 discount for the treadmill. So, a treadmill cost $1350 - $405 = $945. Two 45 - pound plates cost $50 x 2 = $100. So, Andre paid a total of $945 + $100 = $1045.
The answer: 1045
What was the question?
Question: On a mall-wide sale, Andre bought a $1350 treadmill for a 30% discount and 2 pieces of 45-pound plates for $50 each. How much did Andre pay for the treadmill and plates?


Antonio has 30 - 6 = 24 pencils. Antonio and Mitchell have 24 + 30 = 54 pencils together.
The answer: 54
Reverse engineering the question: Mitchell has 30 pencils. He has 6 more pencils than Antonio. How many pencils does Mitchell and Antonio have together?


Day 1:50. Day 2:50(2) = 100. Day 3:100 + 20 = 120. Day 4:2(50 + 100 + 120) = 540. Total:50 + 100 + 120 + 540 = 810 eggs.
The answer: 810
Reverse engineering the question:

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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A frog lays her eggs over a series of 4 days. The first day she lays 50 eggs. The second day, she doubles her production of eggs. The third day she lays 20 more than the second day, and the last day she doubles the first three days total. How many eggs did the frog lay over the span of the 4 days?