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What is Ricky's age now?

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What is Ricky's age now?  [#permalink]

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New post 09 Jan 2014, 06:50
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The Official Guide For GMAT® Quantitative Review, 2ND Edition

What is Ricky's age now?

(1) Ricky is now twice as old as he was exactly 8 years ago.
(2) Ricky's sister Teresa is now 3 times as old as Ricky was exactly 8 years ago.

Data Sufficiency
Question: 27
Category: Algebra Translation into equations
Page: 155
Difficulty: 500


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Re: What is Ricky's age now?  [#permalink]

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New post 09 Jan 2014, 06:50
SOLUTION

What is Ricky's age now?

(1) Ricky is now twice as old as he was exactly 8 years ago --> R = 2(R-8). We can solve for R. Sufficient.

(2) Ricky's sister Teresa is now 3 times as old as Ricky was exactly 8 years ago --> T = 3(R - 8). We cannot solve for R. Not sufficient.

Answer: A.

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Re: What is Ricky's age now?  [#permalink]

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New post 09 Jan 2014, 22:22
Let Ricky's age and Teresa's age now be R & T respectively.

1) R = 2(R-8);
R = 2R-16
R = 16; Sufficient.

2) T = 3(R-8)
2 variables; Insufficient.

Hence, Answer is (A).
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Re: What is Ricky's age now?  [#permalink]

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New post 10 Jan 2014, 11:29
Bunuel wrote:
The Official Guide For GMAT® Quantitative Review, 2ND Edition

What is Ricky's age now?

(1) Ricky is now twice as old as he was exactly 8 years ago.
(2) Ricky's sister Teresa is now 3 times as old as Ricky was exactly 8 years ago.



Statement 1) r = 2(r-8), definitely r can be determined - Sufficient.
Statement 2) s = 3(r-8) , we don't know s, we cannot determine r. Not Sufficient.
Hence Option A)
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Re: What is Ricky's age now?  [#permalink]

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New post 28 Dec 2018, 10:06
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: What is Ricky's age now?   [#permalink] 28 Dec 2018, 10:06
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