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

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Senior Manager
Joined: 06 Apr 2008
Posts: 429

Kudos [?]: 168 [3], given: 1

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

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26 Jul 2008, 02:18
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Difficulty:

15% (low)

Question Stats:

67% (00:24) correct 33% (00:32) wrong based on 263 sessions

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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

Kudos [?]: 168 [3], given: 1

Director
Joined: 10 Sep 2007
Posts: 933

Kudos [?]: 356 [1], given: 0

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

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26 Jul 2008, 08:20
1
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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.

Kudos [?]: 356 [1], given: 0

Director
Joined: 20 Sep 2006
Posts: 653

Kudos [?]: 135 [0], given: 7

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

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26 Jul 2008, 08:23
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

Kudos [?]: 135 [0], given: 7

Director
Joined: 10 Sep 2007
Posts: 933

Kudos [?]: 356 [0], given: 0

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

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26 Jul 2008, 08:46
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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Intern
Joined: 18 Jul 2008
Posts: 1

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

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26 Jul 2008, 10:25
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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Director
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Re: GMATPrep Q (s + t =0) [#permalink]

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26 Jul 2008, 10:57
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.

Kudos [?]: 356 [0], given: 0

Director
Joined: 29 Nov 2012
Posts: 866

Kudos [?]: 1454 [0], given: 543

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

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06 Mar 2013, 06:06
Is the answer A whats the OA?
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Kudos [?]: 1454 [0], given: 543

Math Expert
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Kudos [?]: 133079 [0], given: 12403

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

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06 Mar 2013, 08:39
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
_________________

Kudos [?]: 133079 [0], given: 12403

Re: If s and t are two different numbers on the number line , is   [#permalink] 06 Mar 2013, 08:39
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