Brain Teasers
Used Car
Michelle Knaw bought a used car for $600 and sold it for $800. She later bought it back for $1000 and resold it for $1200. Did Michelle make any profit and if so how much?
Answer
At first it appears that Michelle made a profit of $200, however this is not the case. Michelle made a total profit of $400 since she made $200 profit each time she sold the car.Hide Answer Show Answer
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Comments
No, its right. She does make 400.
Good Teaser!
Great!
impossible. she sold it for 800 dollars the first time.....so she had to put an additional 200 dollars into it to buy it for 1000. She then sold it for 200 more than her last purchase price. The semantics on this teaser are vague, but incorrect even so.
The answer is correct. You buy, you sell, you make a profit. End of story.
How is this a teaser? It's clearly $400, and it does not at all appear that she made $200 total profit.
Michelle's profit:
buying the car 1st time: -600
selling the car 1st time: -600 + +800 = +200
buying the car 2nd time: +200 + -1000 = -800
selling the car 2nd time: -800 + +1200 = +400
buying the car 1st time: -600
selling the car 1st time: -600 + +800 = +200
buying the car 2nd time: +200 + -1000 = -800
selling the car 2nd time: -800 + +1200 = +400
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