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What is Jill's age now?

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Joined: 02 Sep 2009
Posts: 41688

Kudos [?]: 124488 [0], given: 12079

What is Jill's age now? [#permalink]

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New post 06 Aug 2017, 07:44
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A
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C
D
E

Difficulty:

  45% (medium)

Question Stats:

83% (00:52) correct 17% (01:21) wrong based on 27 sessions

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Kudos [?]: 124488 [0], given: 12079

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Status: Greatness begins beyond your comfort zone
Joined: 08 Dec 2013
Posts: 1494

Kudos [?]: 863 [1], given: 71

Location: India
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Re: What is Jill's age now? [#permalink]

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New post 06 Aug 2017, 11:25
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Bunuel wrote:
What is Jill's age now?

(1) Jill is now 10 years older than her sister Sarah.
(2) Sarah is now twice as old as she was 10 years ago.


Let Jill's current age = J
and Sarah's current age = S


(1) Jill is now 10 years older than her sister Sarah.
J = S+ 10
Not sufficient

(2) Sarah is now twice as old as she was 10 years ago
S= 2(S-10)
=> S = 2S - 20
=>S = 20
Not sufficient

Combining 1 and 2 , we get
J= 30
Sufficient
Answer C
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Kudos [?]: 863 [1], given: 71

Re: What is Jill's age now?   [#permalink] 06 Aug 2017, 11:25
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