Find LCM and HCF of (i) 12, 18 (ii) 12, 15, 21 by prime factorization method
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(i)HCF = 2 x 3 = 6 There is only one 2 in 18 and only one 3 in 12. LCM = 2 x 2 x 3 x 3 = 36 You need two 2's and two 3's to “cover” both 12 and 18.,
The least common multiple (LCM) of 12 and 18 is 36.
(ii)LCM of 12, 15, and 21 is 420
Step-by-step explanation:
LCM of 12, 15, and 21 is the least number which is exactly divisible by all three numbers.
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