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bit0ffury

The shark weighs 600 K

The shark weighs 600 kilo's plus 1/3 of it's weight. How much does it weigh?

My Grandson had this question on a test, he answered with 800 kilos and got it wrong. Even though he will speak with the teacher about what he should have done to get the correct answer. I would like some feedback in the mean time.

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science & mathematics

Posted 2009-10-06T09:00:29Z
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gunter

63 answers

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There is no better guide through darkness then your own balance

Sad, the teacher is right, even it is more a trick then math: Here we go: Weight=x

600+x/3 = x ; 600 = x-x/3 ; 600 = 2/3x ; 600/2 * 3 = 900 kilo's

hope it helps

Posted 2009-10-06T14:47:35Z

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gunter was invited by Yedda to answer this question.

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