Consistently go wrong with this :(..GMAT PREP

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vishubn: Legendary Member; Posts: 574; Joined: Sun Jun 01, 2008 8:48 am; Location: Bangalore; Thanked: 28 times

by vishubn » Wed Jun 11, 2008 8:31 pm

Attached,,
Help much apprecited in advance

VIshu

Last edited by vishubn on Wed Jun 11, 2008 11:57 pm, edited 1 time in total.

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Source: Beat The GMAT — Problem Solving | Wed Jun 11, 2008 8:31 pm

VerbalAttack: Junior | Next Rank: 30 Posts; Posts: 27; Joined: Mon May 26, 2008 9:34 pm; Thanked: 3 times

by VerbalAttack » Wed Jun 11, 2008 9:03 pm

Sol1 :

y = (x+a)(x+b) ==> y = x^2 + (a+b)x + ab ==> to get x intercept assume y = 0

x^2 + (a+b)x + ab = 0

I) a+b = -1, not sure about ab - Insuff

II) Substitute x=0 ==> ab = -6, not sure about a+b - Insuff

I & II) Suff

Answer C

Sol 2:

I) QPR = 30; can't determine PRS - Insuff
II) PQR + PRQ = 150, only gives us QPR = 180 - 150 = 30, Still we can't get PRS - Insuff

I & II) in fact, both I & II are almost exactly same. - Insuff

Answer E

Sol 3:

Get the ratio 1o of concentrate : 3o water = 4o juice

200 * 6o = 1200o of juice to be prepared

1200o Juice = 300o Concentrate : 900o water

Number 12o cans of concentrate = 300 / 12 = 25cans

Answer A

Cheers

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vishubn: Legendary Member; Posts: 574; Joined: Sun Jun 01, 2008 8:48 am; Location: Bangalore; Thanked: 28 times

by vishubn » Thu Jun 12, 2008 1:09 am

Thanks a lot ! i was confused with the term ounces used !

cheers

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