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UPSC 2016 CDS II Math Paper
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© examsnet.com
Question : 7
Total: 100
In an examination, a student was asked to divide a certain number by 8. By mistake he multiplied it by 8 and got the answer 2016 more than the correct answer. What was the number ?
[2016 CDS-II]
252
256
258
260
Validate
Solution:
Let the number be n.
∴
8
n
=
2016
+
n
8
⇒
8
n
n
8
=
2016
Here, n is a multiple of 8. Among the given options, 256 is the only multiple of 8.
For
n
=
256
8
n
−
n
8
=
8
×
256
−
256
8
=
2048
−
32
=
2016
Thus, the value of n is 256.
© examsnet.com
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