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Maisie decides to stock rabbits at her pet store, unaware that rabbit
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13 Feb 2024, 00:56
13 Feb 2024, 00:56
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Question Stats:
66% (01:29) correct
33% (01:36) wrong based on 18 sessions
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Maisie decides to stock rabbits at her pet store, unaware that rabbit populations double every eight months. If she starts with 6 rabbits, how many rabbits will she have in 4 years, if none of them are sold or die during this period?
96
192
256
324
384
96
192
256
324
384
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Re: Maisie decides to stock rabbits at her pet store, unaware that rabbit
[#permalink]
16 Feb 2024, 05:00
16 Feb 2024, 05:00
Expert Reply
OE
Today: 6 rabbits
8 months: 12 rabbits
16 months: 24 rabbits
24 months: 48 rabbits
32 months: 96 rabbits
40 months: 192 rabbits
48 months: 384 rabbits
The calculations get a little annoying for the last two time periods. If you need a precise answer, use nearby easier numbers and then correct for your estimation. For example, 96 × 2 is really close to 100 × 2 = 200, but subtract 4 × 2 for the overcount: 200 – 8 = 192.
But before you bother to calculate precise numbers, glance at the answers! In this case, they're pretty far apart, so you can go for pure estimation:
40 months: A little less than 100 × 2 = a little less than 200
48 months: A little less than 200 × 2 = a little less than 400
Only answer (E) is close.
The correct answer is (E).
Today: 6 rabbits
8 months: 12 rabbits
16 months: 24 rabbits
24 months: 48 rabbits
32 months: 96 rabbits
40 months: 192 rabbits
48 months: 384 rabbits
The calculations get a little annoying for the last two time periods. If you need a precise answer, use nearby easier numbers and then correct for your estimation. For example, 96 × 2 is really close to 100 × 2 = 200, but subtract 4 × 2 for the overcount: 200 – 8 = 192.
But before you bother to calculate precise numbers, glance at the answers! In this case, they're pretty far apart, so you can go for pure estimation:
40 months: A little less than 100 × 2 = a little less than 200
48 months: A little less than 200 × 2 = a little less than 400
Only answer (E) is close.
The correct answer is (E).
gmatclubot
Re: Maisie decides to stock rabbits at her pet store, unaware that rabbit [#permalink]
16 Feb 2024, 05:00
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