Question

Find the LCM of 12 and 18 and 20 by prime factorisation method​

Answer 1

Answer:

LCM(12, 18, 20) = 180

Step-by-step explanation:

Factors of 12 = 2 × 2 × 3 = 2² × 3

Factors of 18 = 2 × 3 × 3 = 2 × 3²

Factors of 20 = 2 × 2 × 5 = 2² × 5

LCM(12, 18, 20) = 2² × 3² × 5

= 4 × 9 × 5

= 36 × 5

= 180

So, the LCM of 12, 18 and 20 is 180.

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Answer 2

Answer:

The LCM of 12 ,18 and 20 by prime factorisation is

Step-by-step explanation:

12-2*3*2

18-2*3*3

20-2*5*2

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