Question

find the LCM by common division method of 12,15,45​

Answer 1

Heres your answer

12=2×2 ×3

15= 3×5

45= 3×5×3

so LCM= 2×2×3×5×5×3

=900

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Answer 2

3 | 12 , 15 , 45

5 | 4 , 5 , 15

2 | 4, 1, 3

2 | 2, 1 , 3

2. | 1 , 1, 3

3 | 1, 1, 1

therefore

L.C.M. - 3×5×2×2×3 = 180

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