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07 Mar 2016, 09:11
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
75% (01:10) correct
25%
(01:20)
wrong
based on 131
sessions
History
Date
Time
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Not Attempted Yet
Does the integer k have at least four different prime factors?
(1) k/14 is an integer
(2) k/30 is an integer
(1) k/14 is an integer
(2) k/30 is an integer
nipunjain14
Joined: 07 May 2015
Last visit: 12 Aug 2017
Posts: 152
Own Kudos:
Given Kudos: 21
Location: India
Schools: ISB '19 Kellogg '20 Yale '20 HEC Dec"18
GMAT 1: 660 Q48 V31
GPA: 3
07 Mar 2016, 23:49
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St 1: K /14 is integer means k is a multiple of 14
multiple 210 has 4 prime factors, whereas, 28 has 2 prime factors
Insufficient
St2:k /30 is an integer means k is multiple of 30
multiple 30 will have 3 prime factors whereas multiple 210 will have 4 prime factors
Insufficient
St1 + St2:
LCM of 14, 30 = 210
this will have atleast 4 factors
Ans; c
multiple 210 has 4 prime factors, whereas, 28 has 2 prime factors
Insufficient
St2:k /30 is an integer means k is multiple of 30
multiple 30 will have 3 prime factors whereas multiple 210 will have 4 prime factors
Insufficient
St1 + St2:
LCM of 14, 30 = 210
this will have atleast 4 factors
Ans; c
09 Mar 2016, 17:14
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A. K is divisible by 7 and 2 - 2 Prime factors - Not Sufficient
B. K is divisible by 3, 5, 2 - 3 Prime factors - Not sufficient
From a and b, k has latest 4 prime factors,
Hence C
B. K is divisible by 3, 5, 2 - 3 Prime factors - Not sufficient
From a and b, k has latest 4 prime factors,
Hence C
