Question

11. Find the HCF of 54 and 81 using prime factors.
12. Find the LCM of 16 and 24 using prime factors.​

Answer 1

Step-by-step explanation:

11.

     54 = 2 x 3 x 3 x 3

     81 = 3 x 3 x 3 x 3

     therefore,

     HCF of 54 and 81 = 3 x 3 x 3

     = 27

12.

      16 = 2 x 2 x 2 x 2

      24 = 2 x 2 x 2 x 3

      therefore,

      LCM of 16 and 24 = 2 x 2 x 2 x 3

      = 8 x 3

      = 24.

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