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# If the average (arithmetic mean) of five consecutive negative integers

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Director
Joined: 25 Oct 2008
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Location: Kolkata,India
If the average (arithmetic mean) of five consecutive negative integers [#permalink]

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28 Sep 2009, 19:31
00:00

Difficulty:

35% (medium)

Question Stats:

83% (00:37) correct 17% (01:26) wrong based on 19 sessions

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If the average (arithmetic mean) of five consecutive negative integers is 2k – 1, what is the difference between the greatest and least of the five integers?
A)4
B)3
C)2
D)1
E)cannot be determined
[Reveal] Spoiler: OA

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http://gmatclub.com/forum/countdown-beginshas-ended-85483-40.html#p649902

Kudos [?]: 1134 [0], given: 100

Manager
Joined: 25 Mar 2009
Posts: 54

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Re: If the average (arithmetic mean) of five consecutive negative integers [#permalink]

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28 Sep 2009, 23:09
tejal777 wrote:
If the average (arithmetic mean) of five consecutive negative integers is 2k – 1, what is the difference between the greatest and least of the five integers?

Do we need to know the Average is even or odd to find the range of these 5 neg consecutives?

And Even the five are neg or not, the range is always 4.

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Manager
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Re: If the average (arithmetic mean) of five consecutive negative integers [#permalink]

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29 Sep 2009, 11:49
numbers will be 2k-3, 2k-2, 2k-1, 2k, 2k+1
range = 2k+1 - 2k+3 = 4

Kudos [?]: 31 [0], given: 39

Director
Joined: 25 Oct 2008
Posts: 593

Kudos [?]: 1134 [0], given: 100

Location: Kolkata,India
Re: If the average (arithmetic mean) of five consecutive negative integers [#permalink]

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29 Sep 2009, 21:13
Def. sleep deprived when I was doing the question
Sorry got thrown off by the negative integer thing..
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Re: If the average (arithmetic mean) of five consecutive negative integers [#permalink]

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18 May 2011, 00:00
5 consecutive numbers means difference between first and the last integer = 4
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Kudos [?]: 281 [0], given: 10

Re: If the average (arithmetic mean) of five consecutive negative integers   [#permalink] 18 May 2011, 00:00
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