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# The population of a city doubles every twenty-five years. If the.....

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Joined: 12 Feb 2015
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The population of a city doubles every twenty-five years. If the.....  [#permalink]

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04 Dec 2019, 02:02
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Difficulty:

25% (medium)

Question Stats:

74% (00:57) correct 26% (01:00) wrong based on 31 sessions

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The population of a city doubles every twenty-five years. If the population was $$10^5$$ in 1826, what was it a century later in 1926?

A) $$2(10^5)$$
B) $$4(10^5)$$
C) $$(2^4)(10^5)$$
D) $$(10^4)(10^5)$$
E) $$8(10^5)$$

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Manish

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Joined: 16 Feb 2015
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Re: The population of a city doubles every twenty-five years. If the.....  [#permalink]

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04 Dec 2019, 02:08
CAMANISHPARMAR wrote:
The population of a city doubles every twenty-five years. If the population was $$10^5$$ in 1826, what was it a century later in 1926?

A) $$2(10^5)$$
B) $$4(10^5)$$
C) $$(2^4)(10^5)$$
D) $$(10^4)(10^5)$$
E) $$8(10^5)$$

explanation:
for 4 times population will double.
Simply multiply by 2^4
=10^5 X 2^4

IMO-C

Please give kudos, If you find my explanation Good Enough
Re: The population of a city doubles every twenty-five years. If the.....   [#permalink] 04 Dec 2019, 02:08
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