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What is the product of the greatest prime factor of 160 and the greate

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Math Expert
Joined: 02 Sep 2009
Posts: 58335
What is the product of the greatest prime factor of 160 and the greate  [#permalink]

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18 Apr 2017, 23:56
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Difficulty:

5% (low)

Question Stats:

91% (00:51) correct 9% (01:33) wrong based on 84 sessions

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What is the product of the greatest prime factor of 160 and the greatest prime factor of 168?

A. 4
B. 15
C. 35
D. 80
E. 336

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Senior Manager
Joined: 24 Apr 2016
Posts: 324
Re: What is the product of the greatest prime factor of 160 and the greate  [#permalink]

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19 Apr 2017, 00:08
160 = 16 * 10 = 32 * 5 = (2^5) * 5 ==> Greatest Prime Factor is 5

168 = 8 * 3 * 7 = (2^3) * 3 * 7 ==> Greatest Prime Factor is 7

Product of the greatest prime factor of 160 and the greatest prime factor of 168 = 5*7 = 35

Answer is C. 35
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Joined: 09 Sep 2013
Posts: 13080
Re: What is the product of the greatest prime factor of 160 and the greate  [#permalink]

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28 Jan 2019, 13:37
Hello from the GMAT Club BumpBot!

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: What is the product of the greatest prime factor of 160 and the greate   [#permalink] 28 Jan 2019, 13:37
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What is the product of the greatest prime factor of 160 and the greate

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