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Is 1/8 < n < 1/6 ?

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Is 1/8 < n < 1/6 ? [#permalink] New post 08 Jan 2005, 17:00
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Is 1/8 < n < 1/6 ?

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

(2) n + 1/10 < 2/5
[Reveal] Spoiler: OA

Last edited by Bunuel on 25 Oct 2014, 05:00, edited 1 time in total.
Renamed the topic, edited the question and added the OA.
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Re: Is 1/8 < n < 1/6 ? [#permalink] New post 08 Jan 2005, 23:36
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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Re: Is 1/8 < n < 1/6 ? [#permalink] New post 10 Jan 2005, 08:23
praveen if N > is 3/10 doesnt that answer the question that it cannot be between 1/8 and 1/6?

praveen_rao7 wrote:
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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Re: Is 1/8 < n < 1/6 ? [#permalink] New post 24 Oct 2014, 19:44
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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Re: Is 1/8 < n < 1/6 ? [#permalink] New post 25 Oct 2014, 05:05
Expert's post
dauren88 wrote:
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?


Yes. Why cannot n be less than 1/8, so out of the range?
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Re: Is 1/8 < n < 1/6 ? [#permalink] New post 25 Oct 2014, 05:25
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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Re: Is 1/8 < n < 1/6 ? [#permalink] New post 25 Oct 2014, 05:28
Expert's post
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Re: Is 1/8 < n < 1/6 ? [#permalink] New post 25 Oct 2014, 05:42
praveen_rao7 wrote:
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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Re: Is 1/8 < n < 1/6 ? [#permalink] New post 25 Oct 2014, 06:13
Expert's post
lastshot wrote:
praveen_rao7 wrote:
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 ???


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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COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

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Re: Is 1/8 < n < 1/6 ?   [#permalink] 25 Oct 2014, 06:13
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