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RRB Assistant Loco Pilot and Technician Model Paper 2 with solutions
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© examsnet.com
Question : 3
Total: 75
If
25
n
–
1
=
5
2
n
–
1
– 100, then what is the value of n?
0
1
2
–1
Validate
Solution:
25
n
−
1
=
5
2
n
−
1
−
100
⇒
5
2
n
−
1
−
25
n
−
1
=
100
⇒
5
2
n
5
−
(
5
2
)
(
n
−
1
)
=
100
⇒
5
2
n
5
−
5
2
n
−
1
=
100
⇒
5
2
n
5
−
5
2
n
25
=
100
⇒
5
×
5
2
n
−
5
2
n
25
=
100
⇒
5
2
n
[
5
−
1
]
=
2500
⇒
5
2
n
=
2500
4
=
625
⇒
5
2
n
=
(
5
)
4
⇒ 2n = 4
⇒ n = 2
© examsnet.com
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