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What number is not a perfect square: 1280, 729 , 5329 or 3600?

1 Answer

Jul 6, 2015

$\sqrt{1280} = 35.77$ $sqrt(1280) =color(red)( 35.77$ , so this is not a perfect square.

Explanation:

$\sqrt{729} = \sqrt{27.27} = 27$ $sqrt729 =sqrt(27 . 27) =27$

$\sqrt{5329} = \sqrt{73.73} = 73$ $sqrt 5329 = sqrt(73 . 73) = 73$

$\sqrt{3600} = \sqrt{60.60} = 60$ $sqrt3600 = sqrt(60.60) = 60$
The above all are perfect squares, whereas

$\sqrt{1280} = 35.77$ $sqrt(1280) =color(red)( 35.77$ , so this is not a perfect square.

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