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If a = -0.3, which of the following is true?

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If a = -0.3, which of the following is true? [#permalink] New post 12 Dec 2012, 08:05
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If a = -0.3, which of the following is true?

(A) a < a^2 < a^3
(B) a < a^3 < a^2
(C) a^2 < a < a^3
(D) a^2 < a^3 < a
(E) a^3 < a < a^2
[Reveal] Spoiler: OA
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Re: If a = -0.3, which of the following is true? [#permalink] New post 12 Dec 2012, 08:07
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Walkabout wrote:
If a = -0.3, which of the following is true?

(A) a < a^2 < a^3
(B) a < a^3 < a^2
(C) a^2 < a < a^3
(D) a^2 < a^3 < a
(E) a^3 < a < a^2


a=-0.3;
a^2=0.09;
a^3=-0.027;

Thus, a < a^3 < a^2.

Answer: B.
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Re: If a = -0.3, which of the following is true? [#permalink] New post 10 Jan 2014, 03:32
It's tricky. At first sight I thought hey this is easy, it can only be E. But i re-calculated and saw that -0.3^3 = -0.027 which is bigger than -0.3. So B. Hope I'm as smart in the GMAT and calculate first before picking an answer :D
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Re: If a = -0.3, which of the following is true? [#permalink] New post 11 Sep 2014, 12:22
Walkabout wrote:
If a = -0.3, which of the following is true?

(A) a < a^2 < a^3
(B) a < a^3 < a^2
(C) a^2 < a < a^3
(D) a^2 < a^3 < a
(E) a^3 < a < a^2



since a is -ive , square value will have +ive & will be greater than a & a^3

a has also decimal point a^3>a

so a<a^3<a^2
Re: If a = -0.3, which of the following is true?   [#permalink] 11 Sep 2014, 12:22
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