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jai123oct: Junior | Next Rank: 30 Posts; Posts: 23; Joined: Sat Dec 03, 2011 9:24 am; Thanked: 1 times; GMAT Score:560

by jai123oct » Mon Nov 30, 2015 7:55 am

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if 64^x=48^y=36^z ; then what is the possible relation between x,y,z

how to solve this in 2 min and whats the best possible way out .

Thanks

Jai.

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Source: Beat The GMAT — Problem Solving | Mon Nov 30, 2015 7:55 am

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Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Mon Nov 30, 2015 7:57 am

What are the 5 answer choices (that accompany all GMAT questions)?

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Brent

Brent Hanneson - Creator of GMATPrepNow.com

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Brent@GMATPrepNow: GMAT Instructor; Posts: 16207; Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members; Location: Vancouver, BC; Thanked: 5254 times; GMAT Score:770

by Brent@GMATPrepNow » Mon Nov 30, 2015 7:57 am

jai123oct wrote:if 64^x=48^y=36^z ; then what is the possible relation between x,y,z

how to solve this in 2 min and whats the best possible way out .

Thanks

Jai.

Here's one: x = y = z = 0

Cheers,
Brent

Brent Hanneson - Creator of GMATPrepNow.com

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jai123oct: Junior | Next Rank: 30 Posts; Posts: 23; Joined: Sat Dec 03, 2011 9:24 am; Thanked: 1 times; GMAT Score:560

by jai123oct » Mon Nov 30, 2015 8:14 am

Thank you for the choice one ; sorry i don't actually remember the choices ;

but all the answer choices had a linear relation between X, y, z .

i could write the question in a smiple form :

THE QUESTION CAN BE WRITTEN AS BELOW

64^x=48^y=36^z

(2*2*2*2*2)raise to power X = (2*2*2*2*3)RAISE TO POWER Y = (2*2*3*3) raise to power z

All the answer choices had some algebraic relations between x, y,z ; if you can just help me about how to derive one it would be helpfull.

thank you

jai.

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[email protected]: Elite Legendary Member; Posts: 10392; Joined: Sun Jun 23, 2013 6:38 pmFollowed by: 511 members; Location: Palo Alto, CA; Thanked: 2867 times; GMAT Score:800

by [email protected] » Mon Nov 30, 2015 7:27 pm

Hi jai123oct,

Did this question come from a GMAT 'source' or a general math 'source?' The 5 answers are important to have because they can sometimes provide pivotal information that can help you to answer the question quickly or avoid some possible math steps if you were to attempt a longer 'technical' approach to solving it. If you're studying for the GMAT, then you really should focus on GMAT-centric practice materials.

GMAT assassins aren't born, they're made,
Rich

Contact Rich at [email protected]

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