Question

which of the following number is not a perfect square?841,361,1689,1089​

Answer 1

Answer:

1689

It is not a perfect square..

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Answer 2

Answer:

$\sqrt{841} \: \: = \: \: 29$

$\sqrt{361} \: \: = \: \: 19$

$\sqrt{1689} = 41.09$

$\sqrt{1089} = 33$

Hence, 1689 is not a perfect square

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