Question

find LCM of 7 15 and 24 by prime factorisation

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Answer 1

Answer:

Step-by-step explanation:

Hence, 120 is the LCM of 12,15,24.

Answer 2

Answer:

Step-by-step explanation:

Prime factorisation method :

Prime factors of 7 = 7 × 1

Prime factors of 15 = 3 × 5 × 1

Prime factors of 24 = 2 × 2 × 2 × 3 × 1

∴ L.C.M. of ( 7, 15 and 24 ) = 2 × 2 × 2 × 3 × 5 × 7 = 840 (∵ The common factors of 15 and 24 is 3 , so we taken eat once.)