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Find the LCM and HCF of the following in...

Find the LCM and HCF of the following integers by expressing them as product of primes :
(i) 12 ,15 and 30 (b) 18 , 81 and 108

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The correct Answer is:
9
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(i)Find the LCM and HCF of the following integers by applying the prime factorisation method:-12,15 and21 (ii)Find the LCM and HCF of the following integers by applying the prime factorisation method:-17,23 and 29 (iii)