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What is the sum of evenly spaced integers?

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by apoorva.srivastva » Sat Nov 21, 2009 12:01 am
What is the sum of 5 evenly spaced integers?

(1.) The middle number is zero.
(2.) Exactly 2 of the integers are negative.

What is the meaning of evenly spaced integers...doest it necessarily mean consecutive intergers or the intergers are at equal distance from each other!!

Please explain the reasoning in getting the answer to this DS!!

OA follows in some time :)
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Source: — Data Sufficiency |
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by palvarez » Sat Nov 21, 2009 12:39 am
evenly spaced = arithmetic progression.

(1) middle number = 0; the sum = 0, Sufficient.

(2) Insufficient
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by apoorva.srivastva » Sat Nov 21, 2009 1:05 am
palvarez wrote:evenly spaced = arithmetic progression.

(1) middle number = 0; the sum = 0, Sufficient.

(2) Insufficient

OA is A
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by hmon6710moneh » Sat Nov 21, 2009 11:44 am
Agreed, ans is A.

1) since zero is the middle value of 5, the two positive will be essentially be canceled by its equivalent neg value, receptively. Sufficient

2) Simply find two examples that have different sums to make it Insufficient.

-4,-2,0,2,4 = 0
-3,-1,1,3,5 = 5
go farther, go futher, go harder
Is that not why we came?, if not then why bother?
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