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Marcab
Joined: 03 Feb 2011
Last visit: 22 Jan 2021
Posts: 850
Own Kudos:
Given Kudos: 221
Status:Retaking after 7 years
Location: United States (NY)
Concentration: Finance, Economics
Schools: Simon '15 (M$)
GMAT 1: 720 Q49 V39
GPA: 3.75
21 Aug 2011, 10:25
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is (k+1)(k+2)(k+3) divisible by 4?
a)k is divisible by 8
b)(k+1)/3 is odd
i dnt have any problem in statement 1 but in case of statement 2, i am confused b/w two ways.
one is-
if (k+1)/3 is odd, it means k+1 is odd...furthermore k is even
since even numbers comprises of 0 also, therefore the statement is insufficient
the second is-
k=2, (k+1)/3=(2+1)/3=1 which is odd
k=8, (k+1)/3=(8+1)/3=3 which is odd
and so on...considering this method, we can deduce k as either of {2, 8, 14, 20, 26...} for which the above expression is satisfied....
plz help
a)k is divisible by 8
b)(k+1)/3 is odd
i dnt have any problem in statement 1 but in case of statement 2, i am confused b/w two ways.
one is-
if (k+1)/3 is odd, it means k+1 is odd...furthermore k is even
since even numbers comprises of 0 also, therefore the statement is insufficient
the second is-
k=2, (k+1)/3=(2+1)/3=1 which is odd
k=8, (k+1)/3=(8+1)/3=3 which is odd
and so on...considering this method, we can deduce k as either of {2, 8, 14, 20, 26...} for which the above expression is satisfied....
plz help
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21 Aug 2011, 10:46
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K+1/3 is odd ,
Take for instance K+1 = 9 , hence k+1/3 is odd (3) but k=8, hence 9*10*11 is NOT divisible by 4.
but if K+1=15 , k will be 14 and 15*16*17 is divisible by 4 . Hence 2 different answers , NOT sufficient.
Take for instance K+1 = 9 , hence k+1/3 is odd (3) but k=8, hence 9*10*11 is NOT divisible by 4.
but if K+1=15 , k will be 14 and 15*16*17 is divisible by 4 . Hence 2 different answers , NOT sufficient.
Marcab
Joined: 03 Feb 2011
Last visit: 22 Jan 2021
Posts: 850
Own Kudos:
Given Kudos: 221
Status:Retaking after 7 years
Location: United States (NY)
Concentration: Finance, Economics
Schools: Simon '15 (M$)
GMAT 1: 720 Q49 V39
GPA: 3.75
21 Aug 2011, 10:50
Kudos
Bookmarks
thnx man...came to knw where i was missing
Archived Topic
Hi there,
Archived GMAT Club Tests question - no more replies possible.
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Still interested? Check out the "Best Topics" block above for better discussion and related questions.
Thank you for understanding, and happy exploring!
