Find HCF of 90 and 144 by prime fsctorisation method
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90= 2 x 3 x 3 x 5 = 2 x 3^2 x 5
144 = 2 x 2 x 2 x 2 x 3 x 3 = 2 ^ 4 x 3^ 2
hcf = 2 x 3 x 3 =18
144 = 2 x 2 x 2 x 2 x 3 x 3 = 2 ^ 4 x 3^ 2
hcf = 2 x 3 x 3 =18
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