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UPSC CDS Math Basic operation and Factorisation Questions
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© examsnet.com
Question : 49
Total: 77
If
x
+
1
1
+
1
2
+
1
3
=
2
,
then what is
x
equal to ?
[2016 CDS-II]
7
0
13
10
11
10
17
10
Validate
Solution:
x
+
1
1
+
1
2
+
1
3
=
2
⇒
x
+
1
1
+
1
(
7
3
)
=
2
⇒
x
+
1
1
+
3
7
=
2
⇒
x
+
1
(
10
7
)
=
2
⇒
x
+
7
10
=
2
⇒
x
=
2
−
7
10
=
13
10
© examsnet.com
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