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Of the following, which is most nearly equal to √10?

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Of the following, which is most nearly equal to √10? [#permalink] New post 22 Mar 2013, 11:54
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A
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Question Stats:

43% (01:47) correct 57% (00:27) wrong based on 95 sessions
Of the following, which is most nearly equal to √10?

a 3.3
b 3.4
c 3.5
d 3.1
e 3.2
[Reveal] Spoiler: OA
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Re: Of the following, which is most nearly equal to √10? [#permalink] New post 22 Mar 2013, 12:03
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Re: Of the following, which is most nearly equal to √10? [#permalink] New post 23 Mar 2013, 06:35
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Just make quick trials:

I would try first 3.3 x 3.3 = 990 + 99 (and put two decimals) = 10.89

Then 3.2 x 3.2 = 960 + 64 (and put two decimals) = 10.24 ---> near to 10

Then 3.1 x 3.1 = 930 + 31 (and put two decimals) = 9.61

Solution: 3.2

Answer: E

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Re: Of the following, which is most nearly equal to √10? [#permalink] New post 24 Mar 2013, 03:03
Now take the square of 3.1i.e, 3.1X3.1= 9.64
Now the next number has to be closer to 10
You can check by taking the square of 3.3 and then zero down on 3.2!
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Re: Of the following, which is most nearly equal to √10? [#permalink] New post 24 Mar 2013, 04:38
Bunuel wrote:

The correct answer is 3.2 (E), not D.


Fixed. :-D
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Re: Of the following, which is most nearly equal to √10?   [#permalink] 24 Mar 2013, 04:38
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Of the following, which is most nearly equal to √10?

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