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UPSC CDS Math Decimal Fraction Questions
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© examsnet.com
Question : 4
Total: 8
If the points P and Q represent the real numbers
0.
−
83
and
0.
−
62
on the number line, then the distance between P and Q is
[2017 CDS-II]
21
90
19
90
21
100
56
90
Validate
Solution:
P
=
0.8
3
⇒
10
P
=
8.
3
.....(1)
⇒
100
P
=
83.
3
....(2)
Subtracting (1) from (2), we get
100
P
−
10
P
=
83.3
−
8.3
⇒
90
P
=
75
⇒
P
=
75
90
Similarly,
Q
=
62
−
6
90
=
56
90
Q
=
75
90
−
56
90
=
75
−
96
90
=
19
90
© examsnet.com
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