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A certain investment doubled in value every 9 years. If Said

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GMAT Club Legend
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Joined: 07 Jun 2014
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A certain investment doubled in value every 9 years. If Said [#permalink] New post 27 Jul 2018, 07:08
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Question Stats:

66% (01:30) correct 33% (00:52) wrong based on 6 sessions
A certain investment doubled in value every 9 years. If Saidah had $25,125 in the investment when she was 27 years old, what was the value of the investment when she retired at 63 years old?

(A) $50,250
(B) $150,750
(C) $201,000
(D) $251,250
(E) $402,000
[Reveal] Spoiler: OA

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Re: A certain investment doubled in value every 9 years. If Said [#permalink] New post 10 Aug 2018, 18:09
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sandy wrote:
A certain investment doubled in value every 9 years. If Saidah had $25,125 in the investment when she was 27 years old, what was the value of the investment when she retired at 63 years old?

(A) $50,250
(B) $150,750
(C) $201,000
(D) $251,250
(E) $402,000


We are given that Saidah’s investment doubled in value every 9 years, so let’s keep track how much she will have every 9 years, beginning with age 27:

Age 27: $25,125

Age 36: $50,250

Age 45: $100,500

Age 54: $201,000

Age 63: $402,000

Answer: E
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Jeffery Miller
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GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 07 Jun 2014
Posts: 4721
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 91

Kudos [?]: 1625 [0], given: 389

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Re: A certain investment doubled in value every 9 years. If Said [#permalink] New post 12 Aug 2018, 05:21
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Explanation

The value of the investment doubled every 9 years. Calculate the amount of money at the end of each 9-year period:








Age Value
27$25,125
27 + 9 = 36 $50,250
36 + 9 = 45 $100,500
45 + 9 = 54 $201,000
54 + 9 = 63 $402,000

At age 63, the investor had $402,000.
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Sandy
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Re: A certain investment doubled in value every 9 years. If Said   [#permalink] 12 Aug 2018, 05:21
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A certain investment doubled in value every 9 years. If Said

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