Exponents+ absolutes

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Morgoth: Master | Next Rank: 500 Posts; Posts: 316; Joined: Mon Sep 22, 2008 12:04 amFollowed by: 1 member; Thanked: 36 times

by Morgoth » Sun Sep 27, 2009 9:56 am

a and b are integers and a is not equal to b

Is lal*b > 0 ?

Statement I

la^bl > 0

Statement II

lal^b is a non zero integer

[spoiler]OA:C[/spoiler]

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Source: Beat The GMAT — Data Sufficiency | Sun Sep 27, 2009 9:56 am

maihuna: Legendary Member; Posts: 1578; Joined: Sun Dec 28, 2008 1:49 amFollowed by: 9 members; Thanked: 82 times; GMAT Score:720

Re: Exponents+ absolutes

by maihuna » Sun Sep 27, 2009 10:31 am

Morgoth wrote:a and b are integers and a is not equal to b

Is lal*b > 0 ?

Statement I

la^bl > 0

Statement II

lal^b is a non zero integer
[spoiler]OA:C[/spoiler]

I do not agree to OA.

The question is asking whether b>0

1. b=2 or b=-2 for a = 1 it will be always 1

2. it only says a not equal to zero, nothing about b here,

combining doesnt give me anything...so E...

Charged up again to beat the beast

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rohan_vus: Master | Next Rank: 500 Posts; Posts: 189; Joined: Thu Apr 03, 2008 2:03 pm; Location: USA; Thanked: 21 times

by rohan_vus » Sun Sep 27, 2009 10:38 am

I second the point that OA doesnt seem correct . Under existing constraints it has to be E

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Morgoth: Master | Next Rank: 500 Posts; Posts: 316; Joined: Mon Sep 22, 2008 12:04 amFollowed by: 1 member; Thanked: 36 times

by Morgoth » Sun Sep 27, 2009 11:34 am

Even I got E as the answer. Your posts just confirmed my answer. Thanks.

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