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Is OA right?

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Is OA right?

by gmataug08 » Thu Nov 27, 2008 8:29 am
If k=m(m+4)(m+5) k and m are positive integers. Which of the following could divide k evenly?

I.3 II.4 III.6


my answer was all three

but OA says just 3&6

when we take m= 8

K would be 8x12x13

this would be divisible evenly by 3,4&6.

what am I missing here?
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by austin » Thu Nov 27, 2008 9:06 am
m(m+4)(m+5) is always divisible by 3 and 6.
m(m+4)(m+5) is sometimes divisible by 4 --- INCONSISTENT
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by gmataug08 » Thu Nov 27, 2008 9:30 am
austin wrote:m(m+4)(m+5) is always divisible by 3 and 6.
m(m+4)(m+5) is sometimes divisible by 4 --- INCONSISTENT
if the difference is consistency, shouldn't the question be "must" instead of "could" ?
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by austin » Thu Nov 27, 2008 9:31 am
I too think so...
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by mals24 » Thu Nov 27, 2008 9:37 am
gmataug08 your answer is right. Answer should be All of the above. Even Ian's mentioned All of the above as the answer in the following link

https://www.beatthegmat.com/divide-k-evenly-t12311.html
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