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If x is a multiple of 5, y is a factor of 16, and z is a factor of 40,

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Senior RC Moderator
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Joined: 02 Nov 2016
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If x is a multiple of 5, y is a factor of 16, and z is a factor of 40,  [#permalink]

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New post 15 Apr 2017, 00:42
6
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

58% (02:08) correct 42% (01:59) wrong based on 72 sessions

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If x is a multiple of 5, y is a factor of 16, and z is a factor of 40, which of the following must be true?

I. xy is a multiple of z.
II. xy is not a factor of z.
III. xy is a factor of z.

A. None of the above
B. I only
C. II only
D. III only
E. I and II only

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Re: If x is a multiple of 5, y is a factor of 16, and z is a factor of 40,  [#permalink]

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New post 15 Apr 2017, 01:21
1
We can take test cases and negate each of the following.

Since it is must be true, option A
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Re: If x is a multiple of 5, y is a factor of 16, and z is a factor of 40,  [#permalink]

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New post 05 Feb 2019, 05:20
VeritasKarishma...
How to approach for these kinds of problems? Is there any better alternative than plugging in values? If we need to plug in then how to choose the best value for plugging in?

please help
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Re: If x is a multiple of 5, y is a factor of 16, and z is a factor of 40,   [#permalink] 05 Feb 2019, 05:20
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If x is a multiple of 5, y is a factor of 16, and z is a factor of 40,

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