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What is the value of 33a – 2 when a = 2? 16 52 79 697 727

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Joined: 07 Jun 2014
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GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
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What is the value of 33a – 2 when a = 2? 16 52 79 697 727 [#permalink] New post 29 Apr 2018, 00:03
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Question Stats:

100% (00:23) correct 0% (00:00) wrong based on 10 sessions
What is the value of \(3^{3a} - 2\) when \(a = 2\)?

A. 16
B. 52
C. 79
D. 697
E. 727
[Reveal] Spoiler: OA

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Re: What is the value of 33a – 2 when a = 2? 16 52 79 697 727 [#permalink] New post 04 May 2018, 04:20
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3^6 - 2
9*9*9 - 2

81*9 - 2

Hence the answer.
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Re: What is the value of 33a – 2 when a = 2? 16 52 79 697 727 [#permalink] New post 17 Jul 2018, 12:51
sandy wrote:
What is the value of \(3^{3a} - 2\) when \(a = 2\)?

A. 16
B. 52
C. 79
D. 697
E. 727


Given

\(3^{3a} - 2\)

= \(3^{3*2}\) - 2

= (3^3)^2 -2

= \(27^2\) -2

= 727

Note : 25*25 = 625. So, 27*27 will be much higher than 625.

Only option E fits.
Re: What is the value of 33a – 2 when a = 2? 16 52 79 697 727   [#permalink] 17 Jul 2018, 12:51
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