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# What is Jill's age now?

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Math Expert
Joined: 02 Sep 2009
Posts: 55274
What is Jill's age now?  [#permalink]

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06 Aug 2017, 07:44
00:00

Difficulty:

25% (medium)

Question Stats:

81% (01:02) correct 19% (01:00) wrong based on 37 sessions

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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.

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

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06 Aug 2017, 11:25
1
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
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Re: What is Jill's age now?   [#permalink] 06 Aug 2017, 11:25
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