# A person bought a house for 60m, sold for 70m, bought it again for 80m sold it for 90m. How much did he gain/lose.

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This has nothing to do with operating systems, but the guy made 20m

Posted on Sep 01, 2010

• Warf135 Sep 01, 2010

you can work it out on a calculator really easily:-

-60 + 70 - 80 + 90 = 20.

-60 because that what the guy spent in the first place so he was down by 60, he then sold it for 70 and -60 + 70 = 10. then he buys it again for 80, so its 10 - 80 = -70 he's now down by 70. Then he sells it for 90, so -70 + 90 = 20 and the guy is laughing coz he just made 20m!

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