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UPSC 2017 CDS II Math Paper
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© examsnet.com
Question : 17
Total: 100
Consider the following numbers :
1. 2222
2. 11664
3. 343343
4. 220347
Which of the above are not perfect squares ?
[2017 CDS-II]
1, 2 and 3
1, 2 and 4
2, 3 and 4
1, 3 and 4
Validate
Solution:
A number that ends with 2, 3, 7 or 8 is never a perfect square.
∴ 2222, 343343 and 220347 is not a perfect square.
Also,
(
108
)
2
=
11664
So,11664 is a perfect square
© examsnet.com
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