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What is the 1st term in sequence S?

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Senior Manager
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What is the 1st term in sequence S?  [#permalink]

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New post 03 Mar 2017, 07:52
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

95% (00:50) correct 5% (00:45) wrong based on 56 sessions

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What is the 1st term in sequence S?

(1) The 3rd term of S is 4.
(2) The 2nd term of S is three times the 1st, and the 3rd term is four times
the 2nd.
Magoosh GMAT Instructor
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Re: What is the 1st term in sequence S?  [#permalink]

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New post 03 Mar 2017, 17:08
1
vikasp99 wrote:
What is the 1st term in sequence S?

(1) The 3rd term of S is 4.
(2) The 2nd term of S is three times the 1st, and the 3rd term is four times
the 2nd.

Dear vikasp99,

I'm happy to help. :-)

This is a poorly written question. It actually has nothing to do with sequences per se. It would be much better if the question simply discussed three separate variables. It's also not very hard. It's just not a good question.

Each statement individual is insufficient.

Combined:
a3 = 4 = 4*(a2)
therefore
a2 = 1

a2 = 1 = 3*(a1)
therefore
a1 = 1/3

Numerical answer. Combined statements are sufficient. Poor question.

OA = (C)

Does all this make sense?
Mike :-)
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Magoosh Test Prep


Education is not the filling of a pail, but the lighting of a fire. — William Butler Yeats (1865 – 1939)

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Re: What is the 1st term in sequence S?  [#permalink]

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New post 04 Mar 2017, 05:32
Let the number of the sequence be a,b,c,d....
Statement 1: c = 4. no idea about a. INSUFFICIENT
Statement 2: b=3a and c = 4b = 12a. no data about a. INSUFFICIENT

St 1 &St 2: c = 4 = 12a or a = 1/3. ANSWER

Option C
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Re: What is the 1st term in sequence S? &nbs [#permalink] 04 Mar 2017, 05:32
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