If k and m are positive integers, and k=m(m+4)(m+8).

Question

If k and m are positive integers, and k=m(m+4)(m+8). Which of the following would be certain to divide k?

I.3
II.4
III.6

Please help to explain how to approach this question.

rajatvermaenator · Answer

Simply put integers and eliminate for ex:
If you put m = 1 , only 3 can divide it. That's your answer.
Only 1

Posted from my mobile device

EMPOWERgmatRichC · Answer

Hi Leonaann,

When posting GMAT questions, you should make sure to post the FULL question (including the 5 answer choices) and post the question to the proper sub-forum. For example, the Problem Solving Forum can be found here:

https://gmatclub.com/forum/problem-solving-ps-140/

As rajatvermaenator has pointed out, this question can be solved rather easily by TESTing VALUES. From that first TEST, we've proven that neither Roman Numeral 2 or 3 will be part of the correct answer. Based on how the 5 answer choices are written, that one bit of work could be enough to get you the correct answer.

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

Bunuel · Answer

Please post PS questions in PS forum: problem-solving-ps-140/ Here are the rules of posting: rules-for-posting-please-read-this-before-posting-133935.html Hope it helps.

If k and m are positive integers, and k=m(m+4)(m+8).

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