Question

Find the HCF of 30, 72 and 432 using prime factorisation, and hence, find the LCM o
(30, 72, 432) and 20​

Answer 1

• Answer
• 30 =2×3×5
• 72 =2×2×2×3×3
• 432 =2×2×2×2×3×3×3
• HCF=6
• 30 = 2×3×5
• 72 = 2×2×2×3×3
• 432 = 2×2×2×2×3×3×3
• 20 = 2×2×5
• LCM = 10800