Question

What is the lcm and hcf of 12,30 and 144

Answer 1

$12 = 2 \times 2 \times 3 \\ 30 = 2 \times 3 \times 5 \\ 144 = 2 \times 2 \times 2 \times 2 \times 3 \times 3$

$hcf = 2 \times 3 = 6$

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Answer 2

Explanation:

Cf of 12-1,2,3,4,6,12

Cf of 30 - 1,2,3,5,6,10,15,30

Cf of 144-1,2,3,4,6,24,36,48,72,144

Common factor - 1,2,3,6

Hcf of 12,30,144=6

• Lcm of 12=2 into 2 into 3 into =12
• Lcm of 30=2 into 3 into 5 into =30
• Lcm of 144=2 into 2 into 2 into 2 into 3 into 3 into =144

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