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The substance in the pile is gradually blown away by wind.

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Senior Manager
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The substance in the pile is gradually blown away by wind. [#permalink] New post 25 Jan 2008, 15:06
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The substance in the pile is gradually blown away by wind. How much of the substance is left by 3pm Thursday?

1) The wind blows away 4 kilos of substance each hour
2) At 5am Tuesday there were 5 tonns of substance in the pile
(A) Statement 1 alone is sufficient, but statement 2 alone is not sufficient
(B) Statement 2 alone is sufficient, but statement 1 alone is not sufficient
(C) Both statements together are sufficient, but neither statement alone is
sufficient
(D) Each statement alone is sufficient
(E) Statement 1 and statement 2 together are not sufficient

I answered C.
OA is E....
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Last edited by suntaurian on 25 Jan 2008, 15:21, edited 1 time in total.
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Re: DS: Substance in the pile... [#permalink] New post 25 Jan 2008, 15:14
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suntaurian wrote:
The substance in the pile is gradually blown away by wind. How much of the substance is left by 3pm Thursday?

1) The wind blows away 4 kilos of substance each hour
2) At 5am Tuesday there were 5 tonns of substance in the pile
(A) Statement 1 alone is sufficient, but statement 2 alone is not sufficient
(B) Statement 2 alone is sufficient, but statement 1 alone is not sufficient
(C) Both statements together are sufficient, but neither statement alone is
sufficient
(D) Each statement alone is sufficient
(E) Statement 1 and statement 2 together are not sufficient

I answered C.


E.

We do not know what Tuesday are we talking, perhaps the day before or perhaps a week before, so we have no enough information to answer the question.
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Re: DS: Substance in the pile... [#permalink] New post 25 Jan 2008, 21:41
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:) simple and tricky +1+1
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Re: DS: Substance in the pile...   [#permalink] 25 Jan 2008, 21:41
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The substance in the pile is gradually blown away by wind.

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