year of birth?

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[email protected]: Master | Next Rank: 500 Posts; Posts: 117; Joined: Mon Oct 27, 2008 5:08 pm; Thanked: 1 times

by [email protected] » Thu Dec 11, 2008 10:35 am

In what year was Ellen born?
(1) Ellen’s brother Pete, who is 1 1/2 years older than Ellen, was born in 1956.
(2) In 1975 Ellen turned 18 years old.

B

Last edited by [email protected] on Thu Dec 11, 2008 11:38 am, edited 1 time in total.

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Source: Beat The GMAT — Data Sufficiency | Thu Dec 11, 2008 10:35 am

NicoFalcon: Junior | Next Rank: 30 Posts; Posts: 23; Joined: Wed Dec 10, 2008 6:36 am; Thanked: 1 times

by NicoFalcon » Thu Dec 11, 2008 11:10 am

I´m confused.

I agree that (2) provides an answer, having the age om certain year, we can deduce in which year Ellen was born (1975-18= 1957)

(1) Too provides the same data, through an indirect approach, giving Pete´s info. If Pete is 211 (weird) years older than Ellen and Pete was born in 1956, then Ellen will be born (?) in 2167. Or is it that you have to take into account the exact "date" in order to know if Pete is going to turn age?

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niraj_a: Legendary Member; Posts: 708; Joined: Sun Jun 01, 2008 4:59 amFollowed by: 1 member; Location: USA; Thanked: 13 times

by niraj_a » Thu Dec 11, 2008 12:43 pm

wierd, i got D as well

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dmateer25: Community Manager; Posts: 1049; Joined: Sun Apr 06, 2008 5:15 pmFollowed by: 27 members; Location: Pittsburgh, PA; Thanked: 113 times; GMAT Score:710

by dmateer25 » Thu Dec 11, 2008 12:53 pm

(1) Ellen’s brother Pete, who is 1 1/2 years older than Ellen, was born in 1956.

If Pete was born in lets say January of 1956 then Ellen would have been born in July of 1957

If Pete was born in December of 1956 then Ellen would have been born in June of 1958.

So we don't know if she was born in 1957 or 1958.

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niraj_a: Legendary Member; Posts: 708; Joined: Sun Jun 01, 2008 4:59 amFollowed by: 1 member; Location: USA; Thanked: 13 times

by niraj_a » Thu Dec 11, 2008 1:04 pm

i.n.s.a.n.e.

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ronniecoleman: Legendary Member; Posts: 546; Joined: Sun Nov 16, 2008 11:00 pm; Location: New Delhi , India; Thanked: 13 times

by ronniecoleman » Thu Dec 11, 2008 10:49 pm

IMO B

Option 1:

PETER CAN BE BORN IN ANY HALF OF 1956..
So if born in first half

Then she is born in 1954

So if born in Second half:

Then she is born in 1955

Insufficient

Option 2:

1975- 18years.. 1957 ...

Admission champion, Hauz khaz
011-27565856

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anabbasi: Junior | Next Rank: 30 Posts; Posts: 15; Joined: Tue Dec 02, 2008 4:12 pm; Thanked: 1 times

by anabbasi » Thu Dec 11, 2008 10:56 pm

IMO B is the answer.

A does not provide information as if he was born in early part of year or llater part

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