A notebook costs $1.50 x 3 = $4.50. So Lyle will pay $4.50 x 4 = $18 for the 4 notebooks.
The answer: 18
Reverse engineering the question: A notebook costs three times as much as a pen. If a pen costs $1.50, how much will Lyle pay for 4 notebooks?
Reasoning and answer: Morgan's lunch cost $4 + $2 + $3 = $9. If he pays with a $20 bill, he will receive change of $20 - $9 = $11.
The answer: 11
What was the question?
Question: Morgan goes to the drive-thru and orders his lunch. He gets a hamburger for $4, onion rings for $2 and a smoothie for $3. If he pays with a $20 bill, how much change does he receive?
If the number of green houses is three times the number of yellow houses, and there are 90 green houses, then there are 90 / 3 = 30 yellow houses. She also has 40 fewer yellow houses than blue houses, meaning there are 30 + 40 = 70 blue houses. The number of houses that are not yellow is 70 blue houses + 90 green houses = 160.
The answer: 160
Reverse engineering the question: Isabella has three times as many green houses as yellow houses. She also has 40 fewer yellow houses than red houses. If she has 90 green houses, how many of her houses are not yellow?
Reasoning and answer: The class is 60% girls because 100 - 40 = 60. The class average is 86% because .4(80) + .6(90) = 86.
The answer: 86
What was the question?
Question: A class is 40% boys. The rest are girls. Every boy in class gets an 80% on the math test. Every girl gets a 90%. What is the class average on the test?
Dino works 20 hours at a rate of $10 an hour, which means that work pays him 20 * 10 = 200 dollars a month. Dino works 30 hours at a rate of $20 an hour, which means that work pays him 30 * 20 = 600 dollars a month. Dino works 5 hours at a rate of $40 an hour, which means that work pays him 5 * 40 = 200 dollars a month. Altogether, this means Dino makes 200 + 200 + 600 = 1000 dollars a month. You subtract Dino's expenses of 500 from this amount, meaning he has 1000 - 500 = 500 dollars at the end of the month.
The answer: 500
Reverse engineering the question: Dino does some online gig work for a living. He works 20 hours a month making $10 an hour. He works 30 hours a month making $20 an hour. He works 5 hours a month making $40 an hour. He pays $500 a month in expenses. How much money does Dino have left at the end of the month?
There are 2 * 1,000 ml = 2,000 ml in a 2 - liter bottle of soda. A 2 - liter bottle of soda lasts 2,000 / 500 = 4 days.
The answer: 4
Reverse engineering the question:
Dana normally drinks a 500 ml bottle of soda each day. Since the 500 ml bottles are currently out of stock at the store, she buys a 2-liter bottle of soda instead. If Dana continues to drink 500 ml of soda each day, how long will the 2-liter bottle of soda last? There are 1,000 ml in 1 liter.