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If John is exactly twice as old as Mark,how old is John?

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Manager
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G
Joined: 29 Nov 2018
Posts: 65
Concentration: Marketing, Strategy
If John is exactly twice as old as Mark,how old is John?  [#permalink]

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New post 28 Dec 2018, 11:11
1
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A
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D
E

Difficulty:

  25% (medium)

Question Stats:

86% (01:08) correct 14% (01:23) wrong based on 21 sessions

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If John is exactly twice as old as Mark,how old is John?

1. Five years ago, John was exactly thrice as old as Mark.

2. 10 years from now,John will be exactly 1.5 times as old as Mark.

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Status: Learning stage
Joined: 01 Oct 2017
Posts: 951
WE: Supply Chain Management (Energy and Utilities)
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Re: If John is exactly twice as old as Mark,how old is John?  [#permalink]

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New post 28 Dec 2018, 20:01
cfc198 wrote:
If John is exactly twice as old as Mark,how old is John?

1. Five years ago, John was exactly thrice as old as Mark.

2. 10 years from now,John will be exactly 1.5 times as old as Mark.

If you liked the question, please do hit the kudos button :)


J=2M
J=?

1. J-5=3(M-5) ; by substituting the M=J/2, J can be determined. Sufficient
2. J+10=1.5(M+10); by substituting the M=J/2, J can be determined. Sufficient

Ans. (D)
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Re: If John is exactly twice as old as Mark,how old is John? &nbs [#permalink] 28 Dec 2018, 20:01
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If John is exactly twice as old as Mark,how old is John?

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