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20 Jul 2021, 06:45
Kudos
Bookmarks
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
69% (01:33) correct
31%
(01:22)
wrong
based on 197
sessions
History
Date
Time
Result
Not Attempted Yet
Of the following, the closest approximation of \(\sqrt{\frac{12.45*20.12}{99.71}}\) is
A 0.5
B 2
C 5
D 20
E 50
A 0.5
B 2
C 5
D 20
E 50
20 Jul 2021, 07:00
Kudos
Bookmarks
Bunuel
Rounding off, the root is roughly equal to
\(\sqrt{\frac{12.5*20}{100}} = \sqrt{\frac{25*10}{100}} = \sqrt{2.5} \)
and that is approximately 1.6 (since 1.6^2 = 2.56). So the answer would have to be 2 here, but it's a bit strange that we have one answer (0.5) that suggests we're meant to find an approximation to the tenths place, but then the right answer is instead rounded off to the nearest integer (and really isn't very close to the value we're asked to approximate). In similar real GMAT questions, I've always found the natural approximation to be very close to the right answer.
07 Sep 2024, 07:18
Kudos
Bookmarks
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A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.
This post was generated automatically.
