1.

Which of the following numbers are perfect squares?(i) 121 (ii) 136 (iii) 256 (iv) 321 (v) 600

Answer»
NumberPrime factorizationPerfect square numbers Yes/No
i) 121121 = 11 x 11 = 112yes
ii) 136136 = 8 x 17 = 2 x 2 x 2 x 17No
iii) 256256 = 2 x 2 x 2 x 2 x 2 x 2 x 2x 2 = 28= (24)2yes
iv) 321321 = 3 x 107No
v) 600600 = 120 x 5 = 12 x 10 x 5 = 2 x 2 x 2 x 3 x 5 x 5No



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