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Is w + h^4 positive? (1) h is positive (2) w is positive
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15 Jun 2016, 03:15
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Is \(w + h^4\) positive? (1) h is positive (2) w is positive
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Re: Is w + h^4 positive? (1) h is positive (2) w is positive
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15 Jun 2016, 03:19
AbdurRakib wrote: Is \(w + h^4\) positive? 1) h is positive 2) w is positive Key to this question is to understand that \(h^4\) is always positive. Then Statement (1) cannot guarantee that \(w + h^4\) Say h is 1 and w is 2, then given statement is negative. say h is 2 and w is 1 then given statement is positive. So not sufficient. Statement (2) says w is positive. Now \(h^4\) is always positive so the combined expression will be positive. Sufficient. B is the answer.



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Re: Is w + h^4 positive? (1) h is positive (2) w is positive
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06 Dec 2016, 08:19
AbdurRakib wrote: Is \(w + h^4\) positive? 1) h is positive 2) w is positive We need to determine whether w+h^4 is positive. First, we know that h^4 is always nonnegative. Let’s look at the 2 possibilities for the value of w+h^4: 1) If w is positive, then (w + h^4) will be positive. 2) If w is negative, then h^4 must be greater than w in order for (w + h^4) to be positive. For example if w = 4, then h^4 must be greater than 4 in order for (w + h^4) to be positive. Statement One Alone:h is positive Since we already know that h^4 is positive and do not have any information about w, we do not have enough information to answer the question. We can eliminate answer choices A and D. Statement Two Alone:w is positive Since we know that h^4 is nonnegative, also knowing that w is positive is enough information to determine that w + h^4 is positive. Statement two is sufficient to answer the question. Answer: B
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Re: Is w + h^4 positive? (1) h is positive (2) w is positive
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12 Dec 2016, 14:24
Is w+h^4 For any sign of h, h^4 is always positive 3 cases for w 1, If W is negative, h should be greater to result positive 2, W and H positive 3, If W is negative and greater than h , negative result 1, Insufficient 2, Sufficient B
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Re: Is w + h^4 positive? (1) h is positive (2) w is positive
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13 Dec 2016, 04:55
Here is my solution: Question: Is \(w+h^{4}\) positive ? Statement 1: h is positive. \(h^{4}\) is always positive (even power). So we need to know the value of w. Not sufficient. Statement 2: w is positive Both w and h are positive. Sufficient. Hence B.
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Is w + h^4 positive? (1) h is positive (2) w is positive
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Updated on: 21 May 2019, 07:25
Is \(w + h^4\) positive?
h^4 is always positive value regardless of value of h
1) h is positive
Let h =1 & w=0........Answer is Yes
Let h =1 & w=10........Answer is No
Insufficient
2) w is positive
h^4 + w =positive or zero+Positive =Positive value..............Answer is Yes
Sufficient
Answer: B
Originally posted by Mo2men on 28 Jul 2017, 15:54.
Last edited by Mo2men on 21 May 2019, 07:25, edited 1 time in total.



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Re: Is w + h^4 positive? (1) h is positive (2) w is positive
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18 Sep 2017, 03:56
As h has an even power which is 4 it will always turn out to be positive even if h is negative so the deciding factor here is w. Hence answer is B



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Re: Is w + h^4 positive? (1) h is positive (2) w is positive
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12 Jan 2018, 04:48
Here since h has got even power, so h got to be positive. So now the question is whether w is positive or negative. STMT 1  h is positive . Not sufficient , Since we need info related to W STMT2  w is positive . Sufficient . Answer is B
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Re: Is w + h^4 positive? (1) h is positive (2) w is positive
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28 Jan 2018, 09:13
niks18 amanvermagmatQuote: Is \(w + h^4\) positive? 1) h is positive 2) w is positive Can I plug in below two values for St 1 (we already know that \(h^4\) is always positive irrespective of value of h) If w = 1 and h=1 then we get result as 0 and ans to Q is NO (0 is neither positive, nor negative) If w=1 and h=1 then we get result as 2, ans is YES Is my number picking approach correct?
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Re: Is w + h^4 positive? (1) h is positive (2) w is positive
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28 Jan 2018, 09:19
adkikani wrote: niks18 amanvermagmatQuote: Is \(w + h^4\) positive? 1) h is positive 2) w is positive Hi Experts, Can I plug in below two values for St 1 (we already know that \(h^4\) is always positive irrespective of value of h) If w = 1 and h=1 then we get result as 0 and ans to Q is NO (0 is neither positive, nor negative) If w=1 and h=1 then we ger result as 2, and is YES Is my number picking approach correct? Hi adkikaniIn a Yes/No question if you get Yes/No with two plugin then that should be sufficient.



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Re: Is w + h^4 positive? (1) h is positive (2) w is positive
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21 May 2019, 05:02
AbdurRakib wrote: Is \(w + h^4\) positive?
(1) h is positive (2) w is positive Considering expression w + (h^4) the RED portion is always +ve we have to find whether w is >=0 or not? Statement 1. Insufficient Statement 2. Sufficient, w>0
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Re: Is w + h^4 positive? (1) h is positive (2) w is positive
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22 May 2019, 08:00
AbdurRakib wrote: Is \(w + h^4\) positive?
(1) h is positive (2) w is positive my approach 1. if h is positive, it can happen that w is positive  in which case the question stem is true but if w has an unusually large negative value..then the argument does not hold. 2. sufficient; coz h can be negative but an even power turns it positive




Re: Is w + h^4 positive? (1) h is positive (2) w is positive
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