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On the number line, the distance between point A and point C [#permalink]
 15 Jun 2008, 19:25
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On the number line, the distance between point A and point C is 5 and the distance between point B and point C is 20. Does point C lie between A and B?
1) The distance between point A and point B is 25
2) Point A liest to the left of Point B.
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Re: Number Line - DS [#permalink]
15 Jun 2008, 19:39
gmat blows wrote: On the number line, the distance between point A and point C is 5 and the distance between point B and point C is 20. Does point C lie between A and B?
1) The distance between point A and point B is 25
2) Point A liest to the left of Point B. A. given that AC=5, BC=20 and AC=25 , C should be in between AB 2 alone is not suff
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Re: Number Line - DS [#permalink]
16 Jun 2008, 01:45
isn´t it true that we need both?
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Re: Number Line - DS [#permalink]
16 Jun 2008, 12:12
A for first condition we have two possibilities, but for both possibilities C lies between A and B --B-------------------C---A-- --A---C-------------------B-- It is DS C-trap...
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Re: Number Line - DS [#permalink]
16 Jun 2008, 12:43
gmat blows wrote: On the number line, the distance between point A and point C is 5 and the distance between point B and point C is 20. Does point C lie between A and B?
1) The distance between point A and point B is 25
2) Point A liest to the left of Point B. The answer is D -- both statements are sufficient. (1) is sufficient for the reasons already stated in this post. (2) is sufficient because we know the relative placement of A and C and the distance between them. From the question stem, we know that point B can not be between A and C because of the large distance between B and C. Therefore, B can either be to the left of A (and thus, the left of C) or to the right of A (and thus, the right of C). Statememt (2) clears up this question.
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Re: Number Line - DS [#permalink]
16 Jun 2008, 13:12
Yeah the answer is D
from the stem we get 2 situations
1) A--5--C-----20-----B
2) B-----15-------A--5--C
now we need to find out which of the above 2 situations hold
choice A says
A) Distance betn A and B is 25 which means situation (1) applies - sufficient
Choice B says
B)Point A lies left of point B - again situation (1) applies - Sufficient
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Re: Number Line - DS [#permalink]
16 Jun 2008, 15:28
aren't there 4 possibilities from the stem?? because both A could be 5 to the left or 5 to the right of C. and B could be 20 to the left or 20 to the right of C.
thus 4 possibilities:
1) B------A--C *
2) B---------C--A
3) A--C---------B *
4) C--A-------B
therefore, given statement (1), possibilities 1 and 3 work. (1) is sufficient.
however, in possibilities 3 and 4, A lies to the left of B, yet only in 3 is C between A and B. (2) is insufficient.
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Re: Number Line - DS [#permalink]
16 Jun 2008, 21:44
Yep i missed out on the original stem .. two more situations
Answer would be A
sorry for the error
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Re: Number Line - DS [#permalink]
17 Jun 2008, 06:19
maulikmajithia wrote: Yeah the answer is D
from the stem we get 2 situations
1) A--5--C-----20-----B
2) B-----15-------A--5--C
now we need to find out which of the above 2 situations hold
choice A says
A) Distance betn A and B is 25 which means situation (1) applies - sufficient
Choice B says
B)Point A lies left of point B - again situation (1) applies - Sufficient Good point. My mistake, I forgot to swap the positions of A and C --> answer should be A
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Re: Number Line - DS [#permalink]
17 Jun 2008, 11:41
C is the answer. Statement 1 and 2 each give 2 possibilities. Choice C gives one position of A, B, and C.
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Re: Number Line - DS
[#permalink]
17 Jun 2008, 11:41
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