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08 Oct 2015, 08:11
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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:
15%
(low)
Question Stats:
74% (00:59) correct
26%
(01:12)
wrong
based on 285
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If x and y are positive integers, is x/y an integer?
(1) Every factor of y is also a factor of x.
(2) Every factor of x is also a factor of y.
(1) Every factor of y is also a factor of x.
(2) Every factor of x is also a factor of y.
08 Oct 2015, 08:28
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If x and y are positive integers, is x/y an integer?
(1) Every factor of y is also a factor of x.
(2) Every factor of x is also a factor of y.
1. Since every factor of y is also a factor of x , if we cancel the common factors , the quotient will be an integer .
In case x=y , the quotient will be 1 .
x=2x3x5
y=2x3
x/y=5
Sufficient
2. The only case when x/y will an integer in this case is when x=y , then x/y=1
x=2x3
y=2x3x5
x/y=1/5
Not an integer .
Not sufficient
Answer A
(1) Every factor of y is also a factor of x.
(2) Every factor of x is also a factor of y.
1. Since every factor of y is also a factor of x , if we cancel the common factors , the quotient will be an integer .
In case x=y , the quotient will be 1 .
x=2x3x5
y=2x3
x/y=5
Sufficient
2. The only case when x/y will an integer in this case is when x=y , then x/y=1
x=2x3
y=2x3x5
x/y=1/5
Not an integer .
Not sufficient
Answer A
General Discussion
08 Oct 2015, 10:41
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Bunuel
Question : Is x/y and Integer?
Statement 1: Every factor of y is also a factor of x.
@y=2, x=2, x/y is an Integer
@y=2, x=4, x/y is and Integer
Basically x is a multiple of y therefore x/y will always be an Integer
SUFFICIENT
Statement 2: Every factor of x is also a factor of y..
@x=2, y=2, x/y is an Integer
@x=2, y=4, x/y is NOT an Integer
Basically y is a multiple of x therefore x/y may or may NOT be an Integer
NOT SUFFICIENT
Answer: option A
