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aragonn
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If j and k are positive integers, is 6 a factor of j? 28 Mar 2019, 00:14
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55% (hard)

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50% (01:10) correct 50% (00:53) wrong based on 249 sessions

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If j and k are positive integers, is 6 a factor of j?

(1) 6 is a factor of jk.

(2) 6 is not a factor of k.
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LevanKhukhunashvili
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If j and k are positive integers, is 6 a factor of j? Updated on: 28 Mar 2019, 03:22
Originally posted by LevanKhukhunashvili on 28 Mar 2019, 01:30.
Last edited by LevanKhukhunashvili on 28 Mar 2019, 03:22, edited 3 times in total.
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Learn from my mistakes: Try to catch why below reasoning is incorrect

1 stm - if j=6 k=6 the answer is yes. but if j=1 k=6 the answer is no - not suff
2 stm - nothing about j - not suff

1-2 stm together, if jk is divisible by 6 and k is not, then j must be divisible by 6 suff

IMO
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If j and k are positive integers, is 6 a factor of j? 28 Mar 2019, 02:58
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LevanKhukhunashvili - Have you considered the case of j=2,k=3 ?
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If j and k are positive integers, is 6 a factor of j? 28 Mar 2019, 03:13
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aragonn Ouch :) :(
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If j and k are positive integers, is 6 a factor of j? 15 Sep 2020, 10:59
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aragonn
If j and k are positive integers, is 6 a factor of j?

(1) 6 is a factor of jk.

(2) 6 is not a factor of k.

Both statements are satisfied by j=6 and k=1.
In this case, the answer to the question stem is YES.
Both statements are satisfied by j=3 and k=2.
In this case, the answer to the question stem is NO.
Since the answer is YES in the first case but NO in the second case, the two statements combined are INSUFFICIENT.

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If j and k are positive integers, is 6 a factor of j? 17 Jan 2023, 03:21
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Hello from the GMAT Club BumpBot!

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