Math SET-1, Q18(value of Integer K)

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iikarthik: Senior | Next Rank: 100 Posts; Posts: 57; Joined: Sun Jul 06, 2008 10:52 am; Thanked: 1 times; GMAT Score:640

by iikarthik » Mon Jul 19, 2010 10:09 am

Q18:
What is the value of the integer k?
(1) k + 3 > 0
(2) k^4 <= 0

Hi,

Would be of great assistance if someone can solve and explain this problem for me.

Apologies,

Have edited the post .... k^4 <= 0
The OA is B
Thanks
karthik

Last edited by iikarthik on Mon Jul 19, 2010 11:46 am, edited 1 time in total.

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Source: Beat The GMAT — Data Sufficiency | Mon Jul 19, 2010 10:09 am

kvcpk: Legendary Member; Posts: 1893; Joined: Sun May 30, 2010 11:48 pmFollowed by: 7 members; Thanked: 215 times

by kvcpk » Mon Jul 19, 2010 10:49 am

What is the value of the integer k?
(1) k + 3 > 0

k>-3

Now let us say k=0
Is 0>-3 . It is.
What is the answer for the problem now? 0 [because, we want value of k].

Now let us say k=1
Is 1>-3? Yes.

What is the answer in this case? K=1.

If we get 2 different results for the given question, then the statement provided is INSUFFICIENT.
Hence INSUFF

(2) k^4 < 0

k^4<0

Given k is an integer. I believe k^4 can never be less than 0.

I would suggest you to check your source.

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aloneontheedge: Senior | Next Rank: 100 Posts; Posts: 97; Joined: Thu Jan 28, 2010 2:07 am; Thanked: 9 times

by aloneontheedge » Mon Jul 19, 2010 10:52 am

iikarthik wrote:Q18:
What is the value of the integer k?
(1) k + 3 > 0
(2) k^4 < 0

Hi,

Would be of great assistance if someone can solve and explain this problem for me.

The OA is B
Thanks
karthik

Please chk the source,as kvpck mentioned it cannot be < 0

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adi_800: Legendary Member; Posts: 544; Joined: Thu Oct 08, 2009 9:14 amFollowed by: 2 members; Location: Pune, India; Thanked: 31 times

by adi_800 » Fri Jul 23, 2010 9:14 am

kvcpk wrote:What is the value of the integer k?
(1) k + 3 > 0

k>-3

Now let us say k=0
Is 0>-3 . It is.
What is the answer for the problem now? 0 [because, we want value of k].

Now let us say k=1
Is 1>-3? Yes.

What is the answer in this case? K=1.

If we get 2 different results for the given question, then the statement provided is INSUFFICIENT.
Hence INSUFF

(2) k^4 < 0

k^4<0

Given k is an integer. I believe k^4 can never be less than 0.

I would suggest you to check your source.

The second statement says that k^4<= 0. So k^4 does not have to be greater than zero.
it can simply be 0. So, K^4 = 0. So, when it is possible to have this. When k = 0.
So, the value of K is zero and the option B is the answer..

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adi_800: Legendary Member; Posts: 544; Joined: Thu Oct 08, 2009 9:14 amFollowed by: 2 members; Location: Pune, India; Thanked: 31 times

by adi_800 » Fri Jul 23, 2010 9:16 am

It seems that original poster later corrected the problem...dats y kvcpk got wrong..

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kvcpk: Legendary Member; Posts: 1893; Joined: Sun May 30, 2010 11:48 pmFollowed by: 7 members; Thanked: 215 times

by kvcpk » Fri Jul 23, 2010 2:25 pm

adi_800 wrote:It seems that original poster later corrected the problem...dats y kvcpk got wrong..

Thanks Adi..
Original post had wrong details. So stopped it in mid.

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iikarthik: Senior | Next Rank: 100 Posts; Posts: 57; Joined: Sun Jul 06, 2008 10:52 am; Thanked: 1 times; GMAT Score:640

by iikarthik » Sun Jul 25, 2010 7:39 am

Hi all,

Apologies,

It was my mistake..

& i had edited the post.

Thanks,
karthik

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