Question

find the H.C.F and L.C.M of 90 144 by prime factoriation method and verify the answer

Answer 1

Prime Factorization:

90 = 2 X 45

     = 2 X 3 X 15

     = 2 X 3 X 3 X 5

144 = 2 X 72

      = 2 X 2 X 36

      = 2 X 2 X 2 X 18

      = 2 X 2 X 2 X 2 X 9

      = 2 X 2 X 2 X 2 X 3 X 3

HCF = 2 X 3 X 3

        = 18

LCM = 2 X 2 X 2 X 2 X 3 X 3 X 5

        = 720

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