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## Problem Solving-PS

This topic has 6 member replies
Sumit69 Senior | Next Rank: 100 Posts
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#### Problem Solving-PS

Sat Apr 07, 2007 11:57 pm
Elapsed Time: 00:00
• Lap #[LAPCOUNT] ([LAPTIME])
Is n and integer?

n3 is an integer
3\﻿n is an integer

Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient
EACH statement ALONE is sufficient
Statements (1) and (2) TOGETHER are NOT sufficient.

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Sun Apr 08, 2007 12:00 am
Moved to Data Sufficiency section...

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Sumit69 Senior | Next Rank: 100 Posts
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Sun Apr 08, 2007 6:42 am

gabriel Legendary Member
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Sun Apr 08, 2007 12:53 pm
Sumit69 wrote:
Is n and integer?

n3 is an integer
3\﻿n is an integer

Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient
EACH statement ALONE is sufficient
Statements (1) and (2) TOGETHER are NOT sufficient.
the fist statement says that 3*n is a integer ... there are 2 possiblities first n is an integer = 6 .. in which case 3*n is an intger .. second n is of the form a/3 ( a is an integer ) .. in which case again 3*n is an integer .. so first is insufficient ...

the second statement says 3/n is an integer .. there are again 2 possiblities .. first n=1 in which case n is an intger and so is 3/n .. second n is of the form 3/b (b is an integer ) .. in which case 3/n = 3/(3/b) = b an intger .. so again there is no defnite value for n .. so insufficient

now combibng both the cases .. we can see that n is an intger .. so the answer is C

RAGS Senior | Next Rank: 100 Posts
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Thu Apr 12, 2007 8:33 am
The ans is E
bcos lets take 1/3 as n both statements r satisfied

lets take 3 as n again both statements r satisfied

hence E

ajith Legendary Member
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Thu Apr 12, 2007 10:24 pm
Sumit69 wrote:
Is n and integer?

n3 is an integer
3\﻿n is an integer

Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient
EACH statement ALONE is sufficient
Statements (1) and (2) TOGETHER are NOT sufficient.
1 is not sufficient
Take the case of 3n = 6 then n=2 ,n integer
take the case of 3n=7 then n=7/3 , a non integer

2 is not sufficient
take the case when 3/n=1 then n=3,integer
take the case when 3/n =2 then n=3/2, a non integer

now combining both

Consider n=1/3, a non integer, it satisfies both I and II
Consider n=1, an integer , it satisfies both I and II

So, n can be an integer or a non integer

So E it is !!!

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gabriel Legendary Member
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Fri Apr 13, 2007 4:44 am
... yeah the answer seems to be E ... guyz sorry for the wrong answer..

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