DS Problem #1 - How would you solve it?

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cbenk121
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Topic: DS Problem #1 - How would you solve it?

Sun Nov 15, 2009 8:29 pm

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palvarez
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Mon Nov 16, 2009 2:34 am

how much is prs - pqr (1) 180-prs + pqr + qpr(30) = 180. Sufficient. (2) just symmetric info as above. Sufficient. We dont need to know prs and pqr in order to know their difference.

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cbenk121
Really wants to Beat The GMAT!

Joined: 09 Sep 2009
Posts: 188

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Thanked 7 times in 7 posts

Test Date: 11/17/2009
GMAT Score: 760

Mon Nov 16, 2009 1:59 pm

palvarez wrote: how much is prs - pqr (1) 180-prs + pqr + qpr(30) = 180. Sufficient. (2) just symmetric info as above. Sufficient. We dont need to know prs and pqr in order to know their difference. (1) 150 = pqr + 180 - prs. this means that PRS - PQR = 180 - 150 = 30 --> SUFFICIENT (2) PQR + PRQ = 150 --> PQR + 180 - PRS = 150 --> 30 = PRS - PQR --> SUFFICIENT Fantastic, thanks! Good to remember if you're asked for a difference, addition, multiplication, etc...you just have to get the combination to equal something definite.