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# Numbers (Data sufficiency question)

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Intern
Joined: 18 Sep 2014
Posts: 4
Numbers (Data sufficiency question)  [#permalink]

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05 Feb 2018, 03:55
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If S is a sequence of consecutive multiples of 3, how many multiples of 9 are there in S?

(1) There are 15 terms in S.

(2) The greatest term of S is 126.

I had opted for option C (BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient to answer the question asked). However the correct answer is A (statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked).

Reason I chose C - It's nowhere mentioned that the 15 terms in the set are the first 15 consecutive multiples. With 1 & 2 combined the number of multiples of 9 can be determined. Could someone please explain why the correct answer will be A?

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Math Expert
Joined: 02 Sep 2009
Posts: 48041
Re: Numbers (Data sufficiency question)  [#permalink]

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05 Feb 2018, 03:59
Hobbit20 wrote:
If S is a sequence of consecutive multiples of 3, how many multiples of 9 are there in S?

(1) There are 15 terms in S.

(2) The greatest term of S is 126.

I had opted for option C (BOTH statements (1) and (2) TOGETHER are sufficient to answer the question asked, but NEITHER statement ALONE is sufficient to answer the question asked). However the correct answer is A (statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked).

Reason I chose C - It's nowhere mentioned that the 15 terms in the set are the first 15 consecutive multiples. With 1 & 2 combined the number of multiples of 9 can be determined. Could someone please explain why the correct answer will be A?

Discussed here: if-s-is-a-sequence-of-consecutive-multiples-of-172766.html Hope it helps.

Please follow the rules when posting a question: rules-for-posting-please-read-this-before-posting-133935.html Thank you.

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

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Re: Numbers (Data sufficiency question) &nbs [#permalink] 05 Feb 2018, 03:59
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# Numbers (Data sufficiency question)

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