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What is the value of (2^5 + 2^6 + 2^7)?
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04 Jan 2017, 01:54
04 Jan 2017, 01:54
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What is the value of (2^5 + 2^6 + 2^7)?
A. 4096
B. 512
C. 224
D. 196
E. 32
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A. 4096
B. 512
C. 224
D. 196
E. 32
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Re: What is the value of (2^5 + 2^6 + 2^7)?
[#permalink]
04 Jan 2017, 02:17
04 Jan 2017, 02:17
Expert Reply
Bunuel wrote:
What is the value of (2^5 + 2^6 + 2^7)?
A. 4096
B. 512
C. 224
D. 196
E. 32
A. 4096
B. 512
C. 224
D. 196
E. 32
(2^5 + 2^6 + 2^7) = 32 + 64 + 128 = 224
Answer: Option C
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Re: What is the value of (2^5 + 2^6 + 2^7)?
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04 Jan 2017, 11:46
04 Jan 2017, 11:46
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2^5(1+2+4)=32*7=..4
C.
Sent from my SM-G935F using GMAT Club Forum mobile app
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C.
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Re: What is the value of (2^5 + 2^6 + 2^7)?
[#permalink]
06 Jan 2017, 11:01
06 Jan 2017, 11:01
Expert Reply
Bunuel wrote:
What is the value of (2^5 + 2^6 + 2^7)?
A. 4096
B. 512
C. 224
D. 196
E. 32
A. 4096
B. 512
C. 224
D. 196
E. 32
We can factor out 2^5 from the given expression (2^5 + 2^6 + 2^7) and we have:
2^5(1 + 2^1 + 2^2)
32(1 + 2 + 4)
32 x 7 = 224
Answer: C
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Re: What is the value of (2^5 + 2^6 + 2^7)?
[#permalink]
19 Apr 2020, 10:13
19 Apr 2020, 10:13
What is the value of (2^5 + 2^6 + 2^7)?
(2^5 + 2^6 + 2^7)
=2^5(1 + 2^1 + 2^2)
=32(1 + 2 + 4)
=32 x 7 = 224
correct answer C
(2^5 + 2^6 + 2^7)
=2^5(1 + 2^1 + 2^2)
=32(1 + 2 + 4)
=32 x 7 = 224
correct answer C
Re: What is the value of (2^5 + 2^6 + 2^7)?
[#permalink]
19 Apr 2020, 10:38
19 Apr 2020, 10:38
What is the value of (2^5 + 2^6 + 2^7)?
2^5(1+2+4)
2^5*7
Now this results in a number ending with 4.
Which is option C.
Posted from my mobile device
_________________
2^5(1+2+4)
2^5*7
Now this results in a number ending with 4.
Which is option C.
Posted from my mobile device
_________________
In sterquiliniis invenitur- Carl Jung
That which you most want to find will be found where you least want to look
That which you most want to find will be found where you least want to look
Re: What is the value of (2^5 + 2^6 + 2^7)?
[#permalink]
20 Apr 2020, 07:47
20 Apr 2020, 07:47
Bunuel wrote:
What is the value of (2^5 + 2^6 + 2^7)?
A. 4096
B. 512
C. 224
D. 196
E. 32
A. 4096
B. 512
C. 224
D. 196
E. 32
First we factor out to bring numbers to workable range, as calculating these number might be difficult in a stressful environment but I am guessing if anyone has it memorized then they will be fine right? Anywho, here is what I did.
Factoring out lowest value - \(2^5(1 + 2 + 2^2) = 2^5(7) = 32*7 = 224\)
Time taken - 1min.
gmatclubot
Re: What is the value of (2^5 + 2^6 + 2^7)? [#permalink]
20 Apr 2020, 07:47
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