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Find the HCF and LCM or 90 and 144 by the method of prime factorization.

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Find the HCF and  LCM or 90 and  144 by the method of prime factorization.
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90=2 x 3 2 x 5

and     144 =   24 x 32

HCF = 2 x 32 = 18

LCM = 24 x 32 x 5 = 720

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