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RRB Non Technical Model Papers 10 with solutions
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© examsnet.com
Question : 7
Total: 100
The smallest among,
6
√
12
,
3
√
4
,
4
√
5
,
√
3
is
6
√
12
3
√
4
√
3
4
√
5
Validate
Solution:
(4) LCM of indices surds = LCM of 6, 3, 4 and 2 = 12.
So
6
√
12
=
12
√
12
2
=
12
√
144
3
√
4
=
12
√
4
4
=
12
√
256
4
√
5
=
√
12
5
3
=
12
√
125
And,
√
3
=
12
√
3
6
=
12
√
729
Therefore, the smallest surd is
12
√
125
=
4
√
5
© examsnet.com
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