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

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GMAT Club Legend
Joined: 07 Jun 2014
Posts: 4750
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
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Kudos [?]: 1664 [0], given: 396

What is the value of 33a – 2 when a = 2? 16 52 79 697 727 [#permalink]  29 Apr 2018, 00:03
Expert's post
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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

_________________

Sandy
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Manager
Joined: 26 Jan 2018
Posts: 172
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Kudos [?]: 104 [1] , given: 3

Re: What is the value of 33a – 2 when a = 2? 16 52 79 697 727 [#permalink]  04 May 2018, 04:20
1
KUDOS
3^6 - 2
9*9*9 - 2

81*9 - 2

Manager
Joined: 06 Jun 2018
Posts: 94
Followers: 0

Kudos [?]: 56 [0], given: 0

Re: What is the value of 33a – 2 when a = 2? 16 52 79 697 727 [#permalink]  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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