The second scroll is 4080 + 4080 / 2 = 4000 + 2040 = 6120 years old. The third scroll is 6120 + 6120 / 2 = 6120 + 3060 = 9180 years old. The fourth scroll is 9180 + 9180 / 2 = 9180 + 4590 = 13770 years old. The fifth scroll is 13770 + 13770 / 2 = 13770 + 6885 = 20655 years old.
The answer: 20655
Reverse engineering the question: A library cabinet houses five ancient scrolls. The first scroll is 4080 years old. If each scroll is older than the last by half as many years as the last scroll's age, how old is the fifth scroll?
Reasoning and answer: The meals cost 16 + 14 = $30. So each paid 30 / 2 = $15. James left a tip of 30 * .2 = $6. So James paid 15 + 6 = $21.
The answer: 21
What was the question?
Question: James goes out to eat. He orders a steak and egg meal for $16. He is with his friend, who orders chicken fried steak for $14. His friend pays for half the bill and James pays the tip along with his half of the bill. They tip 20%. How much did James pay?
He needs to save up $400 because 4 x 100 = 400. He has 8 months to earn this money because 12 - 4 = 8. He needs to earn $50 a month because 400 / 8 = 50. He needs to do 5 tasks a month because 50 / 10 = 5.
The answer: 5
Reverse engineering the question: Gerald spends $100 a month on baseball supplies. His season is 4 months long. He wants to use the months he's not playing baseball to save up by raking, shoveling, and mowing lawns. He charges $10 for each. How many chores does he need to average a month to save up for his supplies?
Reasoning and answer: There are 750 * 4 = 3000 red jelly beans. There are 3000 / 3 * 4 = 4000 jelly beans in the jar.
The answer: 4000
What was the question?
Question: There are some jelly beans in a jar. Three fourths of the jelly beans are red, and one quarter of the red jelly beans are coconut flavored. If 750 jelly beans are coconut flavored, how many jelly beans are there in the jar?
First find the total number of students in third grade 5 classes * 30 students / class = 150 students. Then find the total number of students in fourth grade 4 classes * 28 students / class = 112 students. Then find the total number of student in fifth grade 4 classes * 27 students / class = 108 students. Now add the number of students in each grade to find the total number of students 150 students + 112 students + 108 students = 370 students. Now find the total cost of one lunch $2.10 + $0.50 + $0.20 = $2.80. Now multiply that cost by the number of students to find the total cost for the school $2.80 / student * 370 students = $1036.
The answer: 1036
Reverse engineering the question: Marla is planning the lunch menu for an elementary school. There are 5 third grade classes with 30 students each, 4 fourth grade classes with 28 students each, and 4 fifth grade classes with 27 students each. Each student gets a hamburger, which costs $2.10, some carrots, which cost $0.50, and a cookie, which cost $0.20. How much does one lunch for all the students cost?
The chickens had 7 * 2 = 14 legs. The sheep had 5 * 4 = 20 legs. There were 14 + 20 = 34 legs.
The answer: 34
Reverse engineering the question:
Farmer Brown fed 7 chickens and 5 sheep. How many total legs were there among the animals he fed?