700 plus level question : GMAT Problem Solving (PS)
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# 700 plus level question

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700 plus level question [#permalink]

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10 Aug 2011, 21:42
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Difficulty:

45% (medium)

Question Stats:

54% (02:08) correct 46% (00:59) wrong based on 47 sessions

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Jane started baby-sitting when she was 18 years old. Whenever she baby-sat
for a child, that child was no more than half her age at the time. Jane is currently
32 years old, and she stopped baby-sitting 10 years ago. What is the
current age of the oldest person for whom Jane could have baby-sat?

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23
24
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Re: 700 plus level question [#permalink]

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10 Aug 2011, 23:08
Current age of oldest child for whom Jane baby sat = Child for whom she baby-sat when she was 18 = 9 + 14 = 23

(C).
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Re: 700 plus level question [#permalink]

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11 Aug 2011, 00:22
Also discussed here:
jane-baby-sitting-114749.html
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Re: 700 plus level question [#permalink]

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21 Aug 2011, 13:49
Jane 18 22 32

Babies <=9

oldest baby = 9 year old baby that she could have baby sat when she was 18.

oldest baby's current age = 9+14 (as its been 14 years since she sat that baby) = 23
Re: 700 plus level question   [#permalink] 21 Aug 2011, 13:49
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# 700 plus level question

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