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Consecutive points

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Consecutive points

by oks » Sat Aug 08, 2009 3:47 pm
5. A, B, C and D are four consecutive points on a straight line. What is the distance between A to D?
(1) AC = 6.
(2) BD = 8.

OA is E. I am not sure why not D? Would not consecutive points mean equally spaced?

Thanks!
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Source: — Data Sufficiency |
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Re: Consecutive points

by shahdevine » Sat Aug 08, 2009 7:11 pm
oks wrote:5. A, B, C and D are four consecutive points on a straight line. What is the distance between A to D?
(1) AC = 6.
(2) BD = 8.

OA is E. I am not sure why not D? Would not consecutive points mean equally spaced?

Thanks!
No four consecutive points does not mean equally spaced. It just means that one comes after the other a<b<c<d

the problem with both statements is that niether state that BC is fixed. Without BC being fixed AD can vary. Hence S1+S2, insufficient.

you got this!
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