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24 Aug 2020, 21:44
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B
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Difficulty:
95%
(hard)
Question Stats:
41% (02:03) correct
59%
(01:42)
wrong
based on 280
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What is the least common multiple of the positive integer x and 12?
(1) The least common multiple of x and 9 is 45?
(2) The least common multiple of x and 4 is 20?
Are You Up For the Challenge: 700 Level Questions
(1) The least common multiple of x and 9 is 45?
(2) The least common multiple of x and 4 is 20?
Are You Up For the Challenge: 700 Level Questions
What is the LCM of x and 12?
(1) The Least Common Multiple of x and 9 is 45?
(2) The Least Common Multiple of x and 4 is 20?
(1) The Least Common Multiple of x and 9 is 45?
(2) The Least Common Multiple of x and 4 is 20?
(1) The least common multiple of x and 9 is 45
This means the X can be 45 or 5. So NOT SUFFICIENT.
(2) The least common multiple of x and 4 is 20?
This means the X can be 20 ,10 or 5. LCM( 12, X ) = 60
So, SUFFICIENT.
Answer : B
Posted from my mobile device
This means the X can be 45 or 5. So NOT SUFFICIENT.
(2) The least common multiple of x and 4 is 20?
This means the X can be 20 ,10 or 5. LCM( 12, X ) = 60
So, SUFFICIENT.
Answer : B
Posted from my mobile device
24 Aug 2020, 23:05
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1. The LCM of x and 9 is 45
So x can be 5 or 15 or 45.
LCM (5,12) = 60, LCM (15,12) = 60 or LCM (45,12) = 360
So Insufficient.
2. The LCM of x and 4 is 20
So x can be 5 or 10 or 20.
LCM (5,12) = 60, LCM (10,12) = 60 or LCM (20,12) = 60
So sufficient.
IMO Ans is B.
So x can be 5 or 15 or 45.
LCM (5,12) = 60, LCM (15,12) = 60 or LCM (45,12) = 360
So Insufficient.
2. The LCM of x and 4 is 20
So x can be 5 or 10 or 20.
LCM (5,12) = 60, LCM (10,12) = 60 or LCM (20,12) = 60
So sufficient.
IMO Ans is B.
