Question

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
(iv) 40, 36 and 126
(v) 84, 90 and 120
(vi) 24, 15 and 36

Answer 1

TO FIND: LCM and HCF of following pairs of integers

(i) 15, 12 and 21

Let us first find the factors of 15, 12 and 21

(ii) 17, 23 and 29

Let us first find the factors of 17, 23 and 29

(iii) 8, 9 and 25

Let us first find the factors of 8,9 and 25

(iv) 40, 36 and 126

Let us first find the factors of 40, 36 and 126

(v) 84, 90 and 120

Let us first find the factors of 84, 90 and 120

(vi) 24, 15 and 36

Let us first find the factors of 24, 15 and 36.