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FN
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Is 1/8 < n < 1/6 ? Updated on: 25 Oct 2014, 06:00
Originally posted by FN on 08 Jan 2005, 18:00.
Last edited by Bunuel on 25 Oct 2014, 06:00, edited 1 time in total.
Renamed the topic, edited the question and added the OA.
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Question Stats:

75% (02:03) correct 25% (01:56) wrong based on 284 sessions

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Is 1/8 < n < 1/6 ?

(1) n + 1/7 > 2/7

(2) n + 1/10 < 2/5
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E
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Is 1/8 < n < 1/6 ? 09 Jan 2005, 00:36
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E it is
1/8 < n <1/6

1) n + 1/7>2/7

just tells you n < 1/7 hence not sufficient

2) n+1/10<2/5
just tells you n > 3/10 hence not sufficient

1 & 2 together tells you 3/10 < n < 1/7 is insufficient too
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Is 1/8 < n < 1/6 ? 10 Jan 2005, 09:23
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praveen if N > is 3/10 doesnt that answer the question that it cannot be between 1/8 and 1/6?

praveen_rao7
E it is
1/8 < n <1/6

1) n + 1/7>2/7

just tells you n < 1/7 hence not sufficient

2) n+1/10<2/5
just tells you n > 3/10 hence not sufficient

1 & 2 together tells you 3/10 < n < 1/7 is insufficient too
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Is 1/8 < n < 1/6 ? 24 Oct 2014, 20:44
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Hello,

If n<3/10, then n is definitely with the range such that 1/8 < n <1/6. Then the answer should be B.

Is this logic faulty?
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Is 1/8 < n < 1/6 ? 25 Oct 2014, 06:05
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Is 1/8 < n < 1/6 ?

(1) n + 1/7 > 2/7

(2) n + 1/10 < 2/5

Hello,

If n<3/10, then n is definitely with the range such that 1/8 < n <1/6. Then the answer should be B.

Is this logic faulty?
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Yes. Why cannot n be less than 1/8, so out of the range?
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Is 1/8 < n < 1/6 ? 25 Oct 2014, 06:25
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Thanks! Got it.
So, if the option suggested that e.g. n=1/7, then that option would be correct, wouldn't it? Because, the option is within the boundary of question steam.
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Is 1/8 < n < 1/6 ? 25 Oct 2014, 06:28
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dauren88
Thanks! Got it.
So, if the option suggested that e.g. n=1/7, then that option would be correct, wouldn't it? Because, the option is within the boundary of question steam.
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Yes, that's correct.
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Is 1/8 < n < 1/6 ? 25 Oct 2014, 06:42
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praveen_rao7
E it is
1/8 < n <1/6

1) n + 1/7>2/7

just tells you n < 1/7 hence not sufficient

2) n+1/10<2/5
just tells you n > 3/10 hence not sufficient

1 & 2 together tells you 3/10 < n < 1/7 is insufficient too
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IMO C !!

Combining statement 1 & 2 lead to range as 1/7<n<3/10 or .1425 < n < .3 , thus sufficient to ans.

Why E ???
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Is 1/8 < n < 1/6 ? 25 Oct 2014, 07:13
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E it is
1/8 < n <1/6

1) n + 1/7>2/7

just tells you n < 1/7 hence not sufficient

2) n+1/10<2/5
just tells you n > 3/10 hence not sufficient

1 & 2 together tells you 3/10 < n < 1/7 is insufficient too

IMO C !!

Combining statement 1 & 2 lead to range as 1/7<n<3/10 or .1425 < n < .3 , thus sufficient to ans.

Why E ???
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Is 1/8 < n < 1/6 ?

(1) n + 1/7 > 2/7 --> n >1/7. Not sufficient.

(2) n + 1/10 < 2/5 --> n < 3/10. Not sufficient.

(1)+(2) We have that 1/7 < n < 3/10 --> 3/21 < n < 9/30. Question asks whether 5/40 < n < 5/30. AS we can see, n can be greater than 5/30, so out of the range. Not sufficient.

Answer: E.
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Is 1/8 < n < 1/6 ? 27 Oct 2021, 22:24
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Q.stem: Is 1/8 < n < 1/6 ? or
is
0.125 < n < 0.167

St(1): n + 1/7 > 2/7

Adding -1/7 to both sides we have n > 1/7 or n > 0.14

We can have n = 0.15 and the answer to question stem is Yes.

We can have n = 0.18 and the answer to question stem is No

Insufficient. Eliminate A ,D

St(2):n + 1/10 < 2/5

Adding -1/10 to both sides we have n < 3/10 =0.3

We can have n = 0.15 and the answer to question stem is Yes.

We can have n = 0.18 and the answer to question stem is No

Insufficient. Eliminate B

Combining (1) & (2)

n > 0.14 and n < 0.3

We can have n = 0.15 and the answer to question stem is Yes.

We can have n = 0.18 and the answer to question stem is No

(option e)

GMAT Tip : Try to "recycle" the testing points for the statements in DS questions to save time.

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