section 18, question 10, 1000DS

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isisalaska: Community Manager; Posts: 363; Joined: Sun Dec 10, 2006 12:24 pmFollowed by: 3 members; Location: St. Louis; Thanked: 7 times

by isisalaska » Sun Jan 28, 2007 4:28 pm

10. What digit does t represent in the decimal 0.t73 ?
(1) t < 5
(2) 0.t73 < 1/t

I though it was B. Couldn't t be "0" in that case 0.073 is < 1/t in all the other instances 0.t73 will always be > 1/t

Isis Alaska

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Source: Beat The GMAT — Data Sufficiency | Sun Jan 28, 2007 4:28 pm

banona: Senior | Next Rank: 100 Posts; Posts: 38; Joined: Sat Dec 30, 2006 7:46 pm; Thanked: 1 times

by banona » Mon Feb 05, 2007 2:11 pm

Hi,
I think my answer may com late, but I hope I coul make a contribution to anderstand why your answer is wrong
well consider the question :
10. What digit does t represent in the decimal 0.t73 ?
(1) t < 5 ( is insuffisant)

(2) 0.t73 < 1/t ( is insuffisant to because we have two possibilities for t that could realize that condition, for instance 1 and 2 ARE POSSIBLE VALUES FOR t)

THERFORE, NO ONE IS SUFFISANT AND ANSWER IS E

Regarding your remark about t =0 ( I THING the question maker implyes that t is different from 0 otherwise they could never write 1/t) and this is never a trick in a GMAT

does anybody have a comment;
Gook luck

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Stacey Koprince: GMAT Instructor; Posts: 2228; Joined: Wed Dec 27, 2006 3:28 pmFollowed by: 694 members; Location: Montreal, Canada; Thanked: 639 times; GMAT Score:780

by Stacey Koprince » Wed Feb 07, 2007 10:53 pm

The real test never uses 1/0 and if it gives us variables on the bottom of fractions, it tells us whatever is necessary to ensure that we won't have 1/0 as a possibility. (So this one for example would have said that x is not zero.) So, basically, don't study this question.

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isisalaska: Community Manager; Posts: 363; Joined: Sun Dec 10, 2006 12:24 pmFollowed by: 3 members; Location: St. Louis; Thanked: 7 times

by isisalaska » Tue Feb 13, 2007 1:48 pm

banona wrote:Hi,
I think my answer may com late, but I hope I coul make a contribution to anderstand why your answer is wrong
well consider the question :
10. What digit does t represent in the decimal 0.t73 ?
(1) t < 5 ( is insuffisant)

(2) 0.t73 < 1/t ( is insuffisant to because we have two possibilities for t that could realize that condition, for instance 1 and 2 ARE POSSIBLE VALUES FOR t)

THERFORE, NO ONE IS SUFFISANT AND ANSWER IS E

Regarding your remark about t =0 ( I THING the question maker implyes that t is different from 0 otherwise they could never write 1/t) and this is never a trick in a GMAT

does anybody have a comment;
Gook luck

but for B) there are not two posibilities: it can only be "1" since "2" would make 0.t73>than1/2 (0.5 is> than 0.273)
...I am still confused

Isis Alaska

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isisalaska: Community Manager; Posts: 363; Joined: Sun Dec 10, 2006 12:24 pmFollowed by: 3 members; Location: St. Louis; Thanked: 7 times

by isisalaska » Tue Feb 13, 2007 2:09 pm

oh I see, thanks!

Isis Alaska

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