Question

3. 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
​

Answer 1

Answer:

Hence, LCM and HCF of 12, 15 and 21 are 420 and 3 respectively. Hence, LCM and HCF of 17, 23 and 29 are 11339 and 1 respectively.

Explanation:

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Answer 2

3| 12,15,21

4|4,5,7

5|1,1,7

7|1,1,1

L.C.M. = 420