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

Find the HCF and LCM of the following by prime factorisation method :
(i) 12 and 15 (ii) 20 and 25 (iii) 28 and 42 (iv) 336 and 56 (v) 12,15 and 21 (vi)10,20 and 30

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