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## #1 2016-10-18 03:56:10

بِسمِ اللَّهِ الرَّحمٰنِ الرَّحيمِ
From: Sahiwal Division
Registered: 2012-03-22
Posts: 22,197
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# Mathematics QuizzesRatio and Proportion

Question:
Let x, y, and z be positive integers such that y is a multiple of x and z. All of the following statements are true except for:

Option A):
X is a factor of y
Option B):
X.z is a factor of y
Option C):
X divides evenly into y.z
Option D):
Y.z is a multiple of x
Option E):
Z divides evenly into y

X.z is a factor of y

Explanation:
Note that this item asks for the choice that is NOT true.
We know y is a multiple of x and z. That means y times any number is also a multiple of x, so choice A must be true.
Also, because we know y is a multiple of x and z, this means that x and z divide evenly into y, so choices B, D and E
are true.
The process of elimination leaves choice C.
Use an example to check this. Let x = 3, y = 12, and z = 6. y is a multiple of x and z, but x  z = 18 is not a multiple
of y = 12.

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