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Question

Find LCM and HCF of 3930 and 1800 by prime factorisation method.

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Solution

By prime factorization method,
Factors of 3930 and 1800 are,
239303196556551311311 21800290024503225375525551
So, 3930=2×3×5×131
1800=2×2×2×3×3×5×5
then, HCF=2×3×5=30
and, LCM=2×2×2×3×3×5×5×131
=235800

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