If Y< X and X M< Y M, what must be true?

GMAT Quantitative Reasoning Practice Test 4

Question : 36 of 100

Marks: +1, -0

Y< X

and

X M< Y M

, what must be true?

$M< X$
$M< Y$
$X< 0$
$M< 0$
$Y< 0$

Validate

Solution:

Y < X

, multiply both sides by M and see that M must be negative since it changed the sign of the inequality. Remember that multiplying both sides of an inequality by a negative number reverses the direction of the inequality sign

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