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Data interpretation- GMATPrep

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Junior | Next Rank: 30 Posts
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by silivest60 » Thu Nov 29, 2007 8:41 pm
I'd like to know whether there is a quick way of solving Statement (2) of this question. I know that in the end gives z=20q, but it's time consuming to add all the those letters z=w+y, y=x+v, etc...until you get the result.
There should be a shortcut....
TIA
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Source: — Data Sufficiency |
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by sujaysolanki » Thu Nov 29, 2007 9:51 pm
r = 2q
s = q + r = 3q
t = q + s = 4q

u = q + r
v = s + u
w = t + v

x = q + u
y = x + v


Actually u dont need to find all the values ..above if we just find the first three values we knonw we can find the rest ...
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by samirpandeyit62 » Thu Nov 29, 2007 10:18 pm
stmt1 : INSUFF

stmt2:

now this is a IS question i.e z=20q or z <>20q should suffice to answer the Q

so the way I look at it is that we only need to express z interms of q, if that can be done then it is immaterial whether z= 20q or z<>20q, coz both will be SUFF

now here we can see that z=w+y, as we go on expressing the variables using the logic provided in stmt 2, we would ultimately be able to express z in terms of q

SUFF
Regards
Samir
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Junior | Next Rank: 30 Posts
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THANK YOU

by silivest60 » Fri Nov 30, 2007 10:36 am
Thanks Samir,
That's right, it does't matter whether the answer is YES or NO as long as it is consistent, so that statement (2) is sufficient....That makes the question doable within 2 minutes...
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