If s and t are two different numbers on the number line , is : GMAT Data Sufficiency (DS)
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# If s and t are two different numbers on the number line , is

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If s and t are two different numbers on the number line , is [#permalink]

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26 Jul 2008, 01:18
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If s and t are two different numbers on the number line , is s + t equal to 0?

(1) The distance between s and 0 is the same as distance between t and 0
(2) 0 is between s and t

OPEN DISCUSSION OF THIS QUESTION IS HERE: if-s-and-t-are-two-different-numbers-on-the-number-line-is-93372.html
[Reveal] Spoiler: OA
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Re: GMATPrep Q (s + t =0) [#permalink]

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26 Jul 2008, 07:20
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IMO A.

1) Tells us both is equidistant from 0. From question we know s and t are different points, so one point will be -ve and the other will be +ve, so their sum will be 0.

2) Tells us 0 is between s and t but does not tells us if 0 is equidistant from s and t or not. For example s to 0 is -.4 and 0 to t is +0.5. Statement 2 is satisfied however s+t = not zero.
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Re: GMATPrep Q (s + t =0) [#permalink]

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26 Jul 2008, 07:23
abhijit_sen wrote:
IMO A.

1) Tells us both is equidistant from 0. From question we know s and t are different points, so one point will be -ve and the other will be +ve, so their sum will be 0.

2) Tells us 0 is between s and t but does not tells us if 0 is equidistant from s and t or not. For example s to 0 is -.4 and 0 to t is +0.5. Statement 2 is satisfied however s+t = not zero.

Good Catch there! At first I thought 2) is saying that 0 is in the middle of s and t.

agree with A
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Re: GMATPrep Q (s + t =0) [#permalink]

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26 Jul 2008, 07:46
rao_1857 wrote:
Good Catch there! At first I thought 2) is saying that 0 is in the middle of s and t.

agree with A

Just a suggestion, whenever possible try to negate one statement in the other statement. This can give you a good counter example for the other statement.

E.g Is 7! divisible by x?
1) 0<=x<=7
2).x is integer

In this scenario make that in case of statement 1 x is some fractional value (negation of statement 2). This way you can get a -ve case very easily.
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Re: GMATPrep Q (s + t =0) [#permalink]

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26 Jul 2008, 09:25
i think hte ans shhould be C. Becasuse statement 1 says OS= Ot. It is possible that s and t both on the same side. Hence we should consider the statement 2 and hence ans is C.
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Re: GMATPrep Q (s + t =0) [#permalink]

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26 Jul 2008, 09:57
vaivish wrote:
i think the ans should be C. Because statement 1 says OS= Ot. It is possible that s and t both on the same side. Hence we should consider the statement 2 and hence ans is C.

nope question says s and t are different points. If you reasoning is correct, then s and t will be same point.
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Re: If s and t are two different numbers on the number line , is [#permalink]

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06 Mar 2013, 05:06
Is the answer A whats the OA?
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Re: If s and t are two different numbers on the number line , is [#permalink]

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06 Mar 2013, 07:39
fozzzy wrote:
Is the answer A whats the OA?

Yes, OA is A.

OPEN DISCUSSION OF THIS QUESTION IS HERE: if-s-and-t-are-two-different-numbers-on-the-number-line-is-93372.html
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Re: If s and t are two different numbers on the number line , is   [#permalink] 06 Mar 2013, 07:39
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