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SSC CGL Tier 2 Exam 25 Oct 2015 Paper 1
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© examsnet.com
Question : 96
Total: 100
6
2
+
7
2
+
8
2
+
9
2
+
10
2
√
7
+
4
√
3
−
√
4
+
2
√
3
is equal to
330
305
355
366
Validate
Solution:
(1)
√
7
+
4
√
3
=
√
7
+
2
×
2
×
√
3
=
√
4
+
3
+
2
×
2
×
√
3
=
√
(
2
+
√
3
)
2
=
2
+
√
3
√
4
+
2
×
√
3
×
1
=
√
3
+
1
+
2
×
√
3
×
1
=
√
(
√
3
+
1
)
2
=
√
3
+
1
∴
√
7
+
4
√
3
−
√
4
+
2
√
3
=
2
+
√
3
−
√
3
−
1
=
1
Again,
1
2
+
2
2
+
.
.
.
+
10
2
=
10
(
10
+
1
)
(
20
+
1
)
6
=
10
×
11
×
21
6
=
385
1
2
+
2
2
+
.
.
.
+
5
2
=
5
(
5
+
1
)
(
10
+
1
)
6
=
5
×
6
×
11
6
=
55
[
∵
1
2
+
2
2
+
3
2
+
−
−
−
n
2
=
n
(
n
+
1
)
(
2
n
+
1
)
6
]
∴
6
2
+
7
2
+
8
2
+
9
2
+
10
2
=
385
−
55
=
330
∴
Expression
=
330
1
=
330
© examsnet.com
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