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Find the HCF of the following numbers
using the method of prime factorisation.
(i) 24. 30
(ii) 216, 81
(iii) 64, 72
(iv) 18, 24, 42
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Explanation:
(i) 24=2×2×2×2×3
30=2×3×5
2and 3 are common factor so answer =6
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