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17 Jun 2019, 00:50
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
95%
(hard)
Question Stats:
46% (02:16) correct
54%
(02:17)
wrong
based on 308
sessions
History
Date
Time
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Not Attempted Yet
Which of the following is the closest approximation to \([\sqrt{73} * \sqrt{239}] ÷ [\sqrt{7.2} + \sqrt{15.7}]\)?
A. 10
B. 15
C. 20
D. 25
E. 30
A. 10
B. 15
C. 20
D. 25
E. 30
Archit3110
17 Jun 2019, 09:08
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\([\sqrt{73} * \sqrt{239}] ÷ [\sqrt{7.2} + \sqrt{15.7}]\\
8*15/(2+4) = 20\\
IMO C \\
\\
\\
8*15/(2+4) = 20\\
IMO C \\
\\
\\
Bunuel
17 Jun 2019, 13:12
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Here we have can see that √ of 73 is close to 81 rather than 64 so the closest value for it would be 9. Similarly √ of 239 is closest to the value of √ of 225, i.e 15.
Hence 9*15/2+4 = 19.28 which is closest to 20. So IMO : it's C
Hence 9*15/2+4 = 19.28 which is closest to 20. So IMO : it's C
