Each part is 10 / 5 = 2 meters long. Therefore, 2 x 3 = 6 meters of yarn were used for crocheting.
The answer: 6
Reverse engineering the question: A 10 meters yarn was cut into 5 equal parts. If 3 parts were used for crocheting, how long was used for crocheting?
Reasoning and answer: Roger has 35 x 2 = 70 apps on his phone. He needs to delete 70 - 50 = 20 apps.
The answer: 20
What was the question?
Question: For Roger's phone to function optimally, he can have a maximum of 50 apps on his phone. However, the recommended number of apps is 35. If Roger has twice the recommended number of apps, how many apps must he delete for his phone to function optimally again?
From the carwash, Hank donates $100 * 0.90 = $90. From the bake sale, Hank donates $80 * 0.75 = $60. From mowing lawns, Hank donates $50 * 1.00 = $50. Hank donates a total of $90 + $60 + $50 = $200.
The answer: 200
Reverse engineering the question: Hank is raising money for the local homeless shelter. Hank makes $100 in a carwash and donates 90% of the proceeds to the local homeless shelter. Hank makes $80 in a bake sale and donates 75% of the proceeds to the local homeless shelter. Then he makes $50 mowing lawns and donates 100% of the proceeds to the local homeless shelter. How much money does Hank donate in total?
Reasoning and answer: He is getting an extra 55 - 20 = 35 text messages per day. So he is getting an extra 35 * 7 = 245 text messages per week.
The answer: 245
What was the question?
Question: John decides to get a new phone number and it ends up being a recycled number. He used to get 20 text messages a day. Now he is getting 55. Assuming the number of texts his friends send has not changed, how many text messages per week is he getting that are not intended for him?
Merry's brother takes care of 10 + 3 = 13 lambs. So, together Merry and her brother have 10 + 13 = 23 lambs.
The answer: 23
Reverse engineering the question: Merry is taking care of 10 lambs. Her brother takes care of 3 more lambs than Merry. How many lambs do Merry and her brother have?
Bianca = 12.5 hours. Celeste 2 * 12.5 = 25 hours. McClain = 25 - 8.5 = 16.5 hours. Total + 12.5 + 25 + 16.5 = 54 hours. 54 hours * 60 minutes = 3240 minutes. Bianca, Celeste and McClain worked a total of 3240 minutes last weekend.
The answer: 3240
Reverse engineering the question:
Bianca worked for 12.5 hours last weekend. Celeste worked for twice that amount of time and McClain worked 8.5 hours less than Celeste. How many minutes did the 3 people work in total?