First find the number of boats eaten by fish: 30 boats * 20% = 6 boats. Then subtract the two groups of boats that were destroyed from the original number to find the number left: 30 boats - 6 boats - 2 boats = 22 boats.
The answer: 22
Reverse engineering the question: Madison makes 30 paper boats and sets them afloat. 20% are eaten by fish and Madison shoots two of the others with flaming arrows. How many boats are left?


Reasoning and answer: The MRI cost 250 * 3 = $750. So between the two things he pays 250 + 750 = $1000. Insurance covered 1000 * .8 = $800. So he had to pay 1000 - 800 = $200.
The answer: 200
What was the question?
Question: Mike has to get an x-ray and an MRI. The x-ray is $250 and the MRI is triple that cost. Insurance covers 80%. How much did he pay?


Tom has 3 * 12 = 36 stickers. Dan has 2 * 36 = 72 stickers.
The answer: 72
Reverse engineering the question: Dan has two times as many stickers as Tom. Tom has 3 times as many stickers as Bob. If Bob has 12 stickers, how many does Dan have?


Reasoning and answer: The discount saved when buying from Guitar Center would be $1000 * 15% = $150. The total cost when buying from Guitar Center would be $1000 - $150 discount + $100 shipping = $950. The discount when buying from Sweetwater would be $1000 * 10% = $100. The total cost when buying from Sweetwater would be $1000 - $100 discount + $0 shipping = $900. Thus, Silvia would save $950 - $900 = $50 when buying from Sweetwater.
The answer: 50
What was the question?
Question: Silvia wants to buy a new guitar online. The price of the guitar has a suggested retail price of $1000. Guitar Center has a special deal of 15% off but has a shipping fee of $100. Sweetwater has a 10% off deal with free shipping. How much will she save by buying from the cheaper store compared to the other store?


There are 5 school days in a week, so the probability Karen packs a ham sandwich is 3 / 5 and the probability she packs cake is 1 / 5. Multiply the two probabilities to find the probability both things happen: 3 / 5 * 1 / 5 = 3 / 25. Now divide 3 by 25 and multiply by 100% to express this probability as a percentage: 3 / 25 * 100% = 12%.
The answer: 12
Reverse engineering the question: Karen packs peanut butter sandwiches in her daughter's lunch 2 randomly chosen days of the week. The other 3 school days, she packs a ham sandwich. She packs a piece of cake on one randomly chosen day and cookies the other four days. What is the probability, expressed as a percentage, that Karen packs a ham sandwich and cake on the same day?


The number of words that Carl can type per hour is 50 * 60 = 3000 words. The number of words that Carl can type in 4 hours is 3000 * 4 = 12000 words. The number of words that Carl can type in 7 days is 12000 * 7 = 84000 words.
The answer: 84000
Reverse engineering the question:
Carl types at a speed of 50 words per minute. If he types continuously for 4 hours per day, how many words can he type in 7 days?