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# (7^6) + (7^8) =

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Magoosh GMAT Instructor
Joined: 28 Dec 2011
Posts: 4485

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Updated on: 19 Sep 2012, 14:57
1
00:00

Difficulty:

5% (low)

Question Stats:

87% (00:43) correct 13% (00:51) wrong based on 91 sessions

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(7^6) + (7^8) =

(A) 7^14
(B) 7^16
(C) 7^48
(D) 14^14
(E) (50)*(7^6)

See a full discussion of this question and the underlying ideas at:

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Mike McGarry
Magoosh Test Prep

Education is not the filling of a pail, but the lighting of a fire. — William Butler Yeats (1865 – 1939)

Originally posted by mikemcgarry on 19 Sep 2012, 12:44.
Last edited by Bunuel on 19 Sep 2012, 14:57, edited 1 time in total.
Renamed the topic.
Math Expert
Joined: 02 Sep 2009
Posts: 64242
Re: (7^6) + (7^8) =  [#permalink]

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19 Sep 2012, 14:55
mikemcgarry wrote:
(7^6) + (7^8) =

(A) 7^14
(B) 7^16
(C) 7^48
(D) 14^14
(E) (50)*(7^6)

See a full discussion of this question and the underlying ideas at:

Factor out $$7^6$$ --> $$7^6+7^8=7^6(1+7^2)=7^6*50$$.

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Re: (7^6) + (7^8) =  [#permalink]

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17 May 2020, 08:10
mikemcgarry wrote:
(7^6) + (7^8) =

(A) 7^14
(B) 7^16
(C) 7^48
(D) 14^14
(E) (50)*(7^6)

See a full discussion of this question and the underlying ideas at:

$$(7^6) + (7^8)$$

$$= (7^6) (1 + 7^2)$$

$$= (50)*(7^6)$$, Answer must be (E)
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Abhishek....

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Re: (7^6) + (7^8) =   [#permalink] 17 May 2020, 08:10