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09 Nov 2019, 04:43
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
56% (01:38) correct
44%
(01:30)
wrong
based on 119
sessions
History
Date
Time
Result
Not Attempted Yet
If n is an odd integer greater than 1, is n prime?
(1) n is a factor of 56
(2) 14 is a factor of 2n
(1) n is a factor of 56
(2) 14 is a factor of 2n
09 Nov 2019, 05:32
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[quote="Bunuel"]If n is an odd integer greater than 1, is n prime?
Imp : n is odd
(1) n is a factor of 56
56=8*7...so n can be ONLY 7...ans YES as 7 is prime
(2) 14 is a factor of 2n
n could be any multiple of 7....
if n=7....yes
if n = 21..No
Insuff
A
Imp : n is odd
(1) n is a factor of 56
56=8*7...so n can be ONLY 7...ans YES as 7 is prime
(2) 14 is a factor of 2n
n could be any multiple of 7....
if n=7....yes
if n = 21..No
Insuff
A
09 Nov 2019, 06:17
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Bunuel
If n is an odd integer greater than 1, is n prime?
(1) n is a factor of 56
(2) 14 is a factor of 2n
(1) n is a factor of 56
(2) 14 is a factor of 2n
Given, n is odd.
(1) n is a factor of 56
--> 56/n = Integer
--> Possible value of n = 7 ONLY
--> A unique value --> Sufficient
(2) 14 is a factor of 2n
--> 2n/14 = Integer
--> n/7 = Integer
--> Possible values of n = 7, 21, 35, . . . so on --> Insufficient
IMO Option A
