Reasoning and answer: The four bags of Reese's cost $9 x 4 = $36. The three bags of Snickers cost $5 x 3 = $15. The five bags of Skittles cost $7 x 5 = $35. Therefore, the unicorn piñata and the treats cost $13 + $36 + $15 + $35 = $99.
The answer: 99
What was the question?
Question: It's Ava's birthday party. Her parents bought a unicorn piñata for $13 and filled it with all of her favorite treats. They bought 4 bags of Reese's for $9 per bag, 3 bags of Snickers for $5 per bag, and 5 bags of Skittles for $7 per bag. How much did the unicorn piñata and the treats cost altogether?


If Jane got 60 points and lost 20 points then the total number of points she accumulated in all the rounds was 60 + 20 = 80 points. If each round is awarded 10 points, then the number of rounds will be 80 / 10 = 8 rounds.
The answer: 8
Reverse engineering the question: In a card game, you are awarded 10 points if you win one round. While playing, Jane ends up with 60 points. If she lost 20 points, then how many rounds did she play?


Reasoning and answer: Let N be the original price each friend was going to pay. 10N = 6(N + 8). 10N = 6N + 48. 4N = 48. N = 12. Then the present costs 10 * 12 = 120.
The answer: 120
What was the question?
Question: Ten friends decide to get an end-of-year gift for their teacher. They plan to split the cost of the gift equally. But four of the group drop out. The remaining friends split the cost equally among themselves. If each share is now $8 more, how much does the gift cost, in dollars?


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?


Reasoning and answer: John earnt $18 / 2 = $9 on Sunday. In total, John made $18 + $9 + $20 = $47 over the two weekends. John needs $60 - $47 = $13 extra to buy the pogo stick.
The answer: 13
What was the question?
Question: John earned $18 on Saturday but he only managed to earn half that amount on Sunday. He earned $20 the previous weekend. How much more money does he need to earn to give him the $60 he needs to buy a new pogo stick?


Reasoning and answer: 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
What was the question?
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?