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Byju's Answer
Standard VIII
Mathematics
Square Numbers
Which of the ...
Question
Which of the following is not a perfect square?
A
169
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B
196
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C
144
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D
245
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Solution
The correct option is
D
245
We know that, the numbers ending with 2, 3, 7, 8 are not perfect squares.
Here, the numbers end with 9, 6, 4 and 5.
We know that,
169
=
13
2
196
=
14
2
144
=
12
2
Also,
15
2
=
225
and
16
2
=
256
So, 245 is not a perfect square.
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