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At the start of an experiment, a certain population consisted of 3 ani
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13 May 2021, 10:13
13 May 2021, 10:13
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At the start of an experiment, a certain population consisted of 3 animals. At the end of each month after the start of the experiment, the population size was double its size at the beginning of that month. Which of the following represents the population size at the end of 10 months?
(A) 2^3
(B) 3^2
(C) 2(3^10)
(D) 3(2^10)
(E) 3(10^2)
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
(A) 2^3
(B) 3^2
(C) 2(3^10)
(D) 3(2^10)
(E) 3(10^2)
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
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Joined: 10 Apr 2015
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Re: At the start of an experiment, a certain population consisted of 3 ani
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13 May 2021, 10:25
13 May 2021, 10:25
1
Carcass wrote:
At the start of an experiment, a certain population consisted of 3 animals. At the end of each month after the start of the experiment, the population size was double its size at the beginning of that month. Which of the following represents the population size at the end of 10 months?
(A) 2^3
(B) 3^2
(C) 2(3^10)
(D) 3(2^10)
(E) 3(10^2)
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
(A) 2^3
(B) 3^2
(C) 2(3^10)
(D) 3(2^10)
(E) 3(10^2)
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
This is a great candidate for creating a growth table
ELAPSED TIME (in months) | NUMBER OF ANIMALS
0 | 3
1 | (3)(2) animals [since the population doubles each month]
2 | (3)(2)(2) animals
3 | (3)(2)(2)(2) animals
4 | (3)(2)(2)(2)(2) animals
.
.
.
We can see the pattern and recognize that, at the end of month 10, we'll have the product of one 3 and ten 2's.
.
.
10 | (3)(2)^10
Answer: D
Cheers,
Brent
gmatclubot
Re: At the start of an experiment, a certain population consisted of 3 ani [#permalink]
13 May 2021, 10:25
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