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#### Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here. # The seventh number in a sequence of numbers is 13 and each  Question banks Downloads My Bookmarks Reviews Important topics
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Manager  Joined: 22 Jun 2019
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The seventh number in a sequence of numbers is 13 and each [#permalink] 00:00

Question Stats: 100% (00:00) correct 0% (00:00) wrong based on 2 sessions
The seventh number in a sequence of numbers is $$31$$ and each number after the first number in the sequence is $$4$$ less than the number immediately preceding it. What is the fourth number in the sequence?

A. $$15$$
B. $$19$$
C. $$35$$
D. $$43$$
E. $$51$$
[Reveal] Spoiler: OA
Manager  Joined: 22 Jun 2019
Posts: 106
Followers: 0

Kudos [?]: 12 , given: 34

Re: The seventh number in a sequence of numbers is 13 and each [#permalink]
Need explanation
Founder  Joined: 18 Apr 2015
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Kudos [?]: 1585 , given: 6981

Re: The seventh number in a sequence of numbers is 13 and each [#permalink]
Expert's post
As seventh number is 31 and each number is 4 less than the immediate previous number:

• Sixth number = 31 + 4 = 35
• Fifth number = 35 + 4 = 39
• Fourth number = 39 + 4 = 43

Hence, the correct answer is option D.

This is a GMAT question. You should use only GRE material, though.

Regards
_________________ GRE Instructor Joined: 10 Apr 2015
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Kudos [?]: 2165  , given: 26

Re: The seventh number in a sequence of numbers is 13 and each [#permalink]
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Expert's post
huda wrote:
The seventh number in a sequence of numbers is $$31$$ and each number after the first number in the sequence is $$4$$ less than the number immediately preceding it. What is the fourth number in the sequence?

A. $$15$$
B. $$19$$
C. $$35$$
D. $$43$$
E. $$51$$

GIVEN: term7 = 31

Each number after the first number in the sequence is 4 LESS than the number immediately PRECEDING it.

This means, term8 = 31 - 4 = 27
And term9 = 27 - 4 = 23
And term10 = 23 - 4 = 19
And so on.

This also tells us that each term is 4 GREATER than the number immediately FOLLOWING it.
So, for example, term6 = 31 + 4 = 35
And term5 = 35 + 4 = 39
And term4 = 39 + 4 = 43

Answer: D

Cheers,
Brent
_________________

Brent Hanneson – Creator of greenlighttestprep.com Sign up for my free GRE Question of the Day emails Re: The seventh number in a sequence of numbers is 13 and each   [#permalink] 09 Aug 2019, 09:01
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