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What is Ricky's age now?

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Bunuel
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What is Ricky's age now? [#permalink] New post  09 Jan 2014, 06:50
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Question Stats:

81% (01:01) correct 19% (01:10) wrong based on 1115 sessions

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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.
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Re: What is Ricky's age now? [#permalink] New post  09 Jan 2014, 06:50
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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] 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] New post  10 Jan 2014, 11:29
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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] New post  01 Jan 2022, 20:33
We don't have to solve this question on paper.
1. we have Rickys age as an equation of what his age was 8 years ago. we can solve this and we will get his current age.
This is sufficient.
2. we get a third variable that is expressed in relation to Rickys age 8 years ago. we dont know anything else about rickys age so solving this would not be possible.

A.
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Re: What is Ricky's age now? [#permalink] New post  08 Feb 2023, 03:27
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]
08 Feb 2023, 03:27
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