Reasoning and answer: He has sharpened in 7 times because 35 / 5 = 7. He has chopped down 91 trees because 7 x 13 = 91.
The answer: 91
What was the question?
Question: Felix is chopping down trees in his backyard. For every 13 trees he chops down he needs to get his axe resharpened. It cost him $5 to sharpen his axe. If he spends $35 on axe sharpening, at least how many trees has he chopped down?


The skin graft took 4 * .5 = 2 weeks longer to recover from than the previous. So that means it took 4 + 2 = 6 weeks to recover from it. That means he took 4 + 6 = 10 weeks to recover from everything.
The answer: 10
Reverse engineering the question: James burned his hand in a freak accident. It takes him 4 weeks to heal enough to get a skin graft. After that it takes him 50% longer than that to heal from the skin graft. How long did he take to recover from everything?


Reasoning and answer: In a year with 12 months, the total number of vehicles passing through the old bridge is 2000 * 12 = 24000. The new bridge has a capacity of 60 / 100 * 2000 = 1200 more vehicles passing through it in a month than the old one. The total number of vehicles passing through the new bridge in a month is 2000 + 1200 = 3200. There are 3200 * 12 = 38400 vehicles passing through the new bridge in a year. Altogether, the two bridges have 38400 + 24000 = 62400 vehicles passing through them in a year.
The answer: 62400
What was the question?
Question: The country of Belize had a 5 lane bridge that had 2000 vehicles passing through it every month. They decided to build a new bridge that had twice the capacity of the old one, and the number of vehicles passing through the new one increased by 60% more than the old bridge. If the bridges work concurrently for a year, calculate the total number of vehicles that pass through the two bridges.


There were a total of 30 x 100 = 3000 tickets ordered by the school organizers. The 4th graders bought 3000 x 30 / 100 = 900 tickets. So, there were 3000 - 900 = 2100 tickets left for the other two grade levels. The 5th graders bought 2100 x 50 / 100 = 1050 tickets. So, 2100 - 1050 = 1050 tickets were left then. Since 100 tickets were bought by the 6th graders, therefore 1050 - 100 = 950 tickets were left unsold.
The answer: 950
Reverse engineering the question: For the funfair, the school organizers ordered 30 rolls of tickets. Each roll of tickets has 100 tickets. The 4th graders bought 30% of the tickets while the 5th graders bought 50% of the remaining tickets. Then the 6th graders bought a total of 100 tickets. How many tickets were left unsold?


Reasoning and answer: Drew’s lawn is 22 * 36 = 792 square feet. He bought enough grass seed to cover 250 * 4 = 1000 square feet. Thus, the leftover grass seed can cover 1000 - 792 = 208 square feet.
The answer: 208
What was the question?
Question: Drew is reseeding his lawn with grass seed. One bag of grass seed covers 250 square feet of lawn. His lawn is 22 feet from the house to the curb and 36 feet from side to side. He bought four bags of seed. How many extra square feet could the leftover grass seed cover after Drew reseeds his lawn?


Reasoning and answer: Joey will earn 3 * $8 = $24 mowing his neighbors’ lawns. He will earn 2 * $9 = $18 selling his collectable figures. He will earn 10 * $5 = $50 at his after - school job. The sneakers cost $24 + $18 + $50 = $92.
The answer: 92
What was the question?
Question:
Joey wants to buy the latest released pair of designer High Jump basketball sneakers. He plans to mow 3 neighbors’ lawns for $8 a lawn, sell 2 collectible figures to his friends for $9 each, and work an after-school job for 10 hours at $5 per hour. If his earnings just cover the price of the High Jump sneakers, how much do the shoes cost?