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What is the value of w^(−2)? [#permalink]
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21 Oct 2015, 21:35
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91% (00:29) correct 9% (00:24) wrong based on 1019 sessions
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Re: What is the value of w^(−2)? [#permalink]
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21 Oct 2015, 23:05
1. w^(1)=(1/2) => (w^(1))^2 =(1/2)^2 =1/4 Sufficient 2. w^3 =8 => w= 2 =>w^(2)=1/(w^2)= 1/4 Sufficient Answer D
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Re: What is the value of w^(−2)? [#permalink]
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21 Oct 2015, 23:34
St1: w^(1) * w^(1) = 0.5*0.5 = 0.25 > Sufficient St2: w^3 = 8 > w = 2 > w^(1) = 0.5 > w^(2) = 0.25 > Sufficient
Answer: D



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Re: What is the value of w^(−2)? [#permalink]
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23 Oct 2015, 01:12
Bunuel wrote: What is the value of w^(−2)?
(1) w^(−1) = 1/2 (2) w^3 = 8
Kudos for a correct solution. Rewrite the question to what is the value of \(\frac{1}{w^2}\) 1) 1/w = 1/2, hence w = 2, sufficient 2) w^3 = 8, hence w = 2 or 2, sufficient since w^2 will always be positive Answer D
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Re: What is the value of w^(−2)? [#permalink]
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23 Oct 2015, 20:45
What is the value of w^(−2)? (1) w^(−1) = 1/2 (2) w^3 = 8 effectively we need to calculate 1/(w)^2 there fore we need to know w ? 1. w^(−1) = 1/2 1/w= 1/2 hence w =2 Since we got unique value .we can calculate 1/(w)^2 2.w^3 = 8 hence w =2 Again we got unique value .we can calculate 1/(w)^2 Hence D ans
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Re: What is the value of w^(−2)? [#permalink]
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24 Oct 2015, 03:31
its asking 1/w^2=? 1. 1/w..jus sqr it 2. w^3=8 w must be 2, then 1/w^2= 1/4... m bit skepticle, did i miss something?
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Re: What is the value of w^(−2)? [#permalink]
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01 Oct 2016, 08:32
Bunuel wrote: What is the value of w^(−2)?
(1) w^(−1) = 1/2 (2) w^3 = 8
Kudos for a correct solution. ============== Really the easiest one... took only 19 Sec. I think Gmat won't give these type of questions unless you do really drastic in Quant...



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Re: What is the value of w^(−2)? [#permalink]
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01 Oct 2016, 08:35
Dabhishek wrote: its asking 1/w^2=? 1. 1/w..jus sqr it 2. w^3=8 w must be 2, then 1/w^2= 1/4... m bit skepticle, did i miss something? ========= What you have done is right... But I think the Question asked just value of W... If you find anything either Square or Square root, It gives a Unique value. Kudos will be same to say thanks ... Hope this helps..



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Re: What is the value of w^(−2)? [#permalink]
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13 Nov 2016, 09:59
Just a small typo... The actual question in the OG 2016 says w^8 = 8 in statement two.



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Re: What is the value of w^(−2)? [#permalink]
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13 Nov 2016, 22:44
Bunuel wrote: What is the value of w^(−2)?
(1) w^(−1) = 1/2 (2) w^3 = 8
Kudos for a correct solution. Question: What is the value of w^(−2) ot 1/w^2?Statement 1: w^(−1) = 1/2i.e. 1/w = 1/2 i.e. 1/w^2 = 1/4 SUFFICIENT Statement 2: w^3 = 8i.e. w = 2 i.e. 1/w^2 = 1/4 SUFFICIENT Answer Option D
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What is the value of w^(−2)? [#permalink]
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22 Jan 2017, 08:59
Hello All, I did it as below: S1  w^(1) = 1/2 so squaring gives w^(2) = 1/4 Sufficient S2  w^3 =8, so w has to be +2 only. It cannot be 2 else w^3 will be 8. So We know w we can get w^2. Sufficient.
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What is the value of w^(−2)? [#permalink]
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23 Jan 2017, 12:19
1,\(W^{1}\) = 1/2 1/W = 1/2 \(W^{2}\)= 1/4 AD 2, \(W^{3}\)= 8 W = 2 \(2^{2}\)= 1/4 D
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Re: What is the value of w^(−2)? [#permalink]
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18 Sep 2017, 04:42
1. 1/w=1/2 so w=2 sufficient 2. w^3=8 so, w=+2 sufficient D



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Re: What is the value of w^(−2)? [#permalink]
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25 Sep 2017, 17:34
If either statement 1 or 2 gave us an even power, would it still be sufficient?
i.e. if statement 1 was: W^2 = number or W^2 = number would that still be sufficient?



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Re: What is the value of w^(−2)? [#permalink]
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25 Sep 2017, 21:16




Re: What is the value of w^(−2)?
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