Find whether each of the following numbers is a perfect square or not ?
121
55
81
49
69
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69
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(a) 121 is a perfect square. [ 11 × 11= 121]
(b) 55 is not a perfect square.
(c) 81 is a perfect square. [ 9×9 = 81]
(d) 49 is a perfect square. [ 7 × 7 = 49]
(e) 69 is not a perfect square.
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