Question

give the LCM of 72 and 821

Answer 1

To find LCM: Prime Factors are required


Prime Factors of 72 = 2 × 2 × 2 × 3 × 3   ⇒ 2³ × 3²

Prime Factors of 821 = 821     (as it is a prime no)


LCM = 2 × 2 × 2 × 3 × 3 × 821    ⇒ 72 × 821

         = 59112


Answer: LCM = 59112

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