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# The infinite sequence a1,a2,...,

Author Message
Intern
Joined: 19 Jun 2018
Posts: 1

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23 Jul 2018, 04:28
00:00

Difficulty:

(N/A)

Question Stats:

60% (02:31) correct 40% (01:43) wrong based on 5 sessions

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Can someone explain this to me:

The infinite sequence a1,a2,...,an .. is such that a1=7,a2=8,a3=10
, and an=an−3+7 for values of n>3. What is the remainder when an
is divided by 7?

A) n is a multiple of 3.
B) n is an even number.

---------------
A) Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked.
B) Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question asked
C) Both statements (1) and (2) TOGETHER are sufficient to answer the question asked; but NEITHER statement ALONE is sufficient
E) Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed
Math Expert
Joined: 02 Sep 2009
Posts: 52296
Re: The infinite sequence a1,a2,...,  [#permalink]

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23 Jul 2018, 04:35
Can someone explain this to me:

The infinite sequence a1,a2,...,an .. is such that a1=7,a2=8,a3=10
, and an=an−3+7 for values of n>3. What is the remainder when an
is divided by 7?

A) n is a multiple of 3.
B) n is an even number.

---------------
A) Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient to answer the question asked.
B) Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient to answer the question asked
C) Both statements (1) and (2) TOGETHER are sufficient to answer the question asked; but NEITHER statement ALONE is sufficient
E) Statements (1) and (2) TOGETHER are NOT sufficient to answer the question asked, and additional data specific to the problem are needed

This question is discussed here: https://gmatclub.com/forum/the-infinite ... 56741.html Hope it helps.

In case of questions please continue discussion in that topic.
_________________
Re: The infinite sequence a1,a2,..., &nbs [#permalink] 23 Jul 2018, 04:35
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