Each pack has 20 / 4 = 5 uncommons. So he got 10 * 5 = 50 uncommons.
The answer: 50
Reverse engineering the question: John buys 10 packs of magic cards. Each pack has 20 cards and 1/4 of those cards are uncommon. How many uncommon cards did he get?


Reasoning and answer: The total time it took to hover over the Mountain and the central time is 3 + 4 = 7 hours. If it hovered further to the Eastern time zone, it took a total of 7 + 2 = 9 hours to cover the whole trip. The next day, it took 2 more hours to cover each of the places it passed through the previous day, taking a total of 2 * 3 = 6 hours. The total time it took on the second day to cover the distance it covered the previous day is 9 + 6 = 15 hours. In total, the train took 15 + 9 = 24 hours to hover over the places in the two days.
The answer: 24
What was the question?
Question: An airplane took a trip along the Eastern Coast of the USA. During the trip, the plane hovered in Mountain time for 3 hours, Central time for 4 hrs, and Eastern time for 2 hrs. The next day it took 2 more hours to hover in each of the places it passed through the previous day. Calculate the total time it took the plane to hover over Mountain time, Central time, and Eastern time in the two days.


A full year has 12 months. So 2 years is 2 * 12 = 24 months. The loan amount is $6,000 that he will repay in 24 months so 6000 / 24 = $250 per month. If he paid his dad back in 5 years that 5 * 12 = 60 months. $6,000 loan spread out over 60 months is 6000 / 60 = $100 per month. To pay it off in 2 years instead of 5, Gary is paying 250 - 100 = $150 more per month.
The answer: 150
Reverse engineering the question: Gary bought his first used car for $6,000. Gary borrowed the money from his dad who said he could pay him back the full amount over 5 years. Gary decided he would pay his dad back the full amount in 2 years. How much more is Gary spending per month to pay the loan off in 2 years instead of 5?


Reasoning and answer: One - third of the classrooms have 30 desks, so there are 1 / 3 * 15 = 5 classrooms like that. The rest, which means 15 - 5 = 10 classrooms, have 25 desks. One - third of the classrooms can fit 5 * 30 = 150 students. The rest can fit 10 * 25 = 250 students. So in total, the school can be filled with 150 + 250 = 400 students.
The answer: 400
What was the question?
Question: A school has 15 classrooms. One-third of these classrooms have 30 desks in each classroom and the rest have 25 desks in each classroom. Only one student can sit at one desk. How many students can this school accommodate so that everyone has their own desk?


There are 60 minutes in an hour so 1 hour 30 minutes is equivalent to [1 + (30 / 60)] hours = 1.5 hours. There are 7 days in a week so he spends 1.5 * 7 = 10.5 hours jogging every week. After 2 weeks he will have spent 2 * 10.5 = 21 hours jogging.
The answer: 21
Reverse engineering the question: Mr. John jogs for 1 hour 30 minutes in the morning every day. How much time (in hours) will he have spent jogging after two weeks?


The cow initially weighs 400 * 1.5 = 600 pounds. So it gained 600 - 400 = 200 pounds. So its value increased by 200 * $3 = $600.
The answer: 600
Reverse engineering the question:
John's cow weighs 400 pounds. It increased its weight to 1.5 times its starting weight. He is able to sell the cow for $3 per pound. How much more is it worth after gaining the weight?