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Quickest possible way to solve this DS quesiton?
Source: Beat The GMAT — Data Sufficiency |
Hi, the answer its b, because if you know that y is multiple of x yo also know that y and x are related, so even in you multiply by 2 you will have a multiple of y, statement 1 is insufficient because you dont know if the +2 wil give you a multiple
x=3 and y=6
2x=6 so y is a multiple
x=4 and y=12
2x=8 so y is not a multiple
b does not hold in this case
2x=6 so y is a multiple
x=4 and y=12
2x=8 so y is not a multiple
b does not hold in this case
Picking numbers is the quickest way.
This problem is in the Kaplan 800 guide.
For (1) and (2):
x = 2, y = 6 => (2x +2)/y = 1; y/x = 3; 2x/y = 4/6 - Not integer
x = 2, y = 2 => (2x +2)/y = 3; y/x = 1; 2x/y = 2 = Integer
Not Sufficient.
E is OA
This problem is in the Kaplan 800 guide.
For (1) and (2):
x = 2, y = 6 => (2x +2)/y = 1; y/x = 3; 2x/y = 4/6 - Not integer
x = 2, y = 2 => (2x +2)/y = 3; y/x = 1; 2x/y = 2 = Integer
Not Sufficient.
E is OA
