Marnie bought 50 x 5 = 250 beads from the 5 bags of 50 beads. She also bought 100 x 2 = 200 beads from the 2 bags of 100 beads. She has a total of 250 + 200 = 450 beads. Hence, she will be able to make 450 / 50 = 9 bracelets.
The answer: 9
Reverse engineering the question: Marnie makes bead bracelets. She bought 5 bags of 50 beads and 2 bags of 100 beads. If 50 beads are used to make one bracelet, how many bracelets will Marnie be able to make out of the beads she bought?


Reasoning and answer: After the birds ate 19 of the tomatoes Haruto has 127 - 19 = 108 tomatoes left. After giving half of his tomatoes to his friend, Haruto had 108 / 2 = 54 tomatoes.
The answer: 54
What was the question?
Question: Haruto has tomato plants in his backyard. This year the plants grew 127 tomatoes. Birds had eaten 19 of the tomatoes. He picked the rest. If Haruto gave half of his tomatoes to his friend, how many tomatoes does he have left?


There is $350 - $100 = $250 available to pay for the students' admission fees. This means they can afford to bring $250 / $10 = 25 students on the trip.
The answer: 25
Reverse engineering the question: The class plans to take a field trip to the zoo. The cost to rent a school bus is $100. The cost of admission is $10 per student. The teacher is allowed in for free. If the class has a budget of $350, how many students can go on the field trip?


Reasoning and answer: Twice the number of pigs is 10 x 2 = 20. So, Hannah's family has 20 - 3 = 17 cows. They also have 17 + 6 = 23 goats. So, they have a total of 10 + 17 + 23 = 50 animals on their farm.
The answer: 50
What was the question?
Question: Hannah's family has ten pigs on their farm. They also have three fewer than twice as many cows as pigs and six more goats than cows. How many animals do they have on their farm?


Ayen jogged for a total of 30 x 3 = 90 minutes on Monday, Wednesday, and Thursday. She jogged for 30 + 5 = 35 minutes on Tuesday. She also jogged for 30 + 25 = 55 minutes on Friday. So, Ayen jogged for a total of 90 + 35 + 55 = 180 minutes. In hours, this is equal to 180 minutes / 60 minutes / hour = 3 hours.
The answer: 3
Reverse engineering the question: Ayen jogs for 30 minutes every day during weekdays. This week on Tuesday, she jogged 5 minutes more and also jogged 25 minutes more on Friday. How many hours, in total, did Ayen jog this week?


She uses 4 hours / day * 125 watts / hour = 500 watt hours / day. That means she uses 500 watt hours / day * 7 days / week = 3500 watt hours / week. This is 3500 watt hours / 1000 watts / kw = 3.5 kw hours. So her TV cost 3.5 kw hours / week * $0.14 / kw hour = $0.49 / week.
The answer: 49
Reverse engineering the question:
Kim's TV uses 125 watts of electricity per hour. She runs it for 4 hours a day. If electricity cost 14 cents per kw/h how many cents does her TV cost to run for a week?