Reasoning and answer: 1 truck uses 3 tanks of 150 liters, so a truck can carry 3 tanks per truck * 150 liters = 450 liters per truck. The total amount of water the 3 trucks carry is 3 trucks * 450 liters per truck = 1350 liters.
The answer: 1350
What was the question?
Question: A farmer has three trucks to carry water to his farm. Each truck uses three tanks with a capacity of 150 liters of water. How many liters of water in total can the farmer carry in his trucks?


He got 20 - 8 = 12 gifts on his 13th birthday. So he got 20 + 12 = 32 total gifts.
The answer: 32
Reverse engineering the question: John received 20 gifts on his 12th birthday. He received 8 fewer gifts on his 13th birthday. How many total gifts did he receive between those two birthdays?


Reasoning and answer: Half as many legs as a single spider has is 8 / 2 = 4 legs. 10 more spiders than half as many legs as a single spider has is 4 + 10 = 14 spiders. The total number of spider legs in a group of 14 spiders is 8 * 14 = 112 spider legs.
The answer: 112
What was the question?
Question: A spider has eight legs. If a group of spiders has 10 more spiders than half as many legs as a single spider has, what is the total number of spider legs in this group of spiders?


If you took 100 photographs of the project 18 hours ago, and today 20% few photographs have been taken, then 20 / 100 * 100 = 20 fewer photographs of the project have been taken today. The total number of photographs of the project that have been taken today is 100 - 20 = 80. So far, you've taken 80 + 100 = 180 photographs of the project. Since the target number of photographs is 300, the number of photographs that you need to take to reach the target is 300 - 180 = 120.
The answer: 120
Reverse engineering the question: Eighteen hours ago, Beth and I took 100 photographs of our project. Today, Beth and I will take 20% fewer photographs of the same project. If we were to take 300 photographs of the project, how many photographs would we take to reach the target?


Reasoning and answer: First, if the a full tire needs 500 cubic inches of air, then two empty tires need: 500 cubic inches / tire * 2 tires = 1000 cubic inches. Accordingly, the 40% - full tire needs 500 cubic inches * (100% - 40%). So, we find the 40% - full tire needs 500 cubic inches * (60%) = 300 cubic inches. And, the 70% - full tire needs 500 cubic inches * (100% - 70%). So, the 70% - full tire needs 500 cubic inches * (30%) = 150 cubic inches. Now add up the needs of all the tires to find the total number of cubic inches needed: 1000 cubic inches + 300 cubic inches + 150 cubic inches = 1450 cubic inches. Finally, if the pumps each hold 50 cubic inches, the total number of pumps needed is 1550 cubic inches / 50 cubic inches / pump = 29 pumps.
The answer: 29
What was the question?
Question: Carson is refilling his tires. Each tire can hold 500 cubic inches of air. Two of the tires are completely flat and empty. One tire is 40% full and the last tire is 70% full. If Carson injects 50 cubic inches of air with each pump, how many pumps will it take him to fill all the tires?


Reasoning and answer: Oliver's $20 bills amount to $20 x 10 = $200. Oliver's $5 bills amount to $5 x 3 = $15. So, Oliver has a total of $200 + $15 = $215. William's $10 bills amount to $10 x 15 = $150. William's $5 bills amount to $5 x 4 = $20. So, William has a total of $150 + $20 = $170. Therefore, Oliver has $215 - $170 = $45 more than William.
The answer: 45
What was the question?
Question:
Oliver has 10 $20 and 3 $5 bills. William has 15 $10 and 4 $5 bills. How much more money does Oliver have than William?