Find the LCM and HCF of the following integers by applying the prime factorisation method: (i) 12, 15 and 21

CBSE Class 10 CBSE Class 10 Maths
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Find the LCM and HCF of the following integers by applying the prime factorisation method:
(i) 12, 15 and 21
(ii) 17, 23 and 29
(iii) 8, 9 and 25

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