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# If 5^x = 8, what is 125^x ?

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Intern
Joined: 20 Oct 2013
Posts: 18
Location: Mexico
Concentration: Finance, Entrepreneurship
If 5^x = 8, what is 125^x ?  [#permalink]

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10 Feb 2014, 11:30
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Question Stats:

100% (00:23) correct 0% (00:00) wrong based on 15 sessions

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If 5^x = 8, what is 125^x ?

Is the solution 200?

Could someone let me know the best approach to solve?

Thanks
Math Expert
Joined: 02 Sep 2009
Posts: 51280
Re: If 5^x = 8, what is 125^x ?  [#permalink]

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10 Feb 2014, 12:42
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1
gabrieldoria wrote:
If 5^x = 8, what is 125^x ?

Is the solution 200?

Could someone let me know the best approach to solve?

Thanks

$$125^x=(5^3)^x=5^{3x}=(5^x)^3=8^3=512$$.

Hope it's clear.

P.S. please read and follow: rules-for-posting-please-read-this-before-posting-133935.html Thank you.
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Re: If 5^x = 8, what is 125^x ?  [#permalink]

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05 Mar 2014, 01:23
1
gabrieldoria wrote:
If 5^x = 8, what is 125^x ?

Is the solution 200?

Could someone let me know the best approach to solve?

Thanks

Whatever method Bunuel used is the best.

If the options were present in this question, it would had been interesting finding out the answer in another way
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Re: If 5^x = 8, what is 125^x ?  [#permalink]

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04 Aug 2018, 05:00
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Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: If 5^x = 8, what is 125^x ? &nbs [#permalink] 04 Aug 2018, 05:00
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# If 5^x = 8, what is 125^x ?

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