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16 Sep 2018, 22:23
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B
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Difficulty:
5%
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Question Stats:
79% (00:41) correct
21%
(00:44)
wrong
based on 1389
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Which of the following is NOT equal to the square of an integer:
A. \(\sqrt{{\sqrt{1}}}\)
B. \(\sqrt{4}\)
C. 18/2
D. 41 - 25
E. 36
A. \(\sqrt{{\sqrt{1}}}\)
B. \(\sqrt{4}\)
C. 18/2
D. 41 - 25
E. 36
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ArjunJag1328
Joined: 24 Dec 2017
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16 Sep 2018, 23:28
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A)\sqrt{[square_root]1}[/square_root] = 1, Square root of 1 is 1
B)\sqrt{4} = 2 is not a square of an integer
C)18/2 = 9 is a square of 3
D) 41-25 = 16 is a square of 4
E) 36 is a square of 6
Hence IMO B
B)\sqrt{4} = 2 is not a square of an integer
C)18/2 = 9 is a square of 3
D) 41-25 = 16 is a square of 4
E) 36 is a square of 6
Hence IMO B
07 Apr 2020, 10:53
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mdsaddamforgmat
Although every positive number has two square roots, the square root notation (√) tells us to take only the positive root
So, for example, 9 has two square roots (3 and-3), since 3² = 9 and (-3)² = 9
However, the square root notation tells us to take the positive root, which means √9 = 3
Likewise, √1 = 1 (only)
Cheers,
Brent
