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LCM by Prime Factorisation Method

 Step I:Resolving each given

number into its prime factors.

16 = 2 × 2 × 2 × 2.

28 = 2 × 2 × 7.

 Step II: The product of all the

factors with highest powers.

= 2 × 2 × 2 × 2 ×7 = 112.

 Step III: The required least

common multiple (L.C.M) of 16

and 28 = 112.