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​

Answer 1

Answer:

step1: (i) 12= 2×2×3 , 15 = 3×5 , 21 = 3×7

step:2 (i) 17 = 17 , 23 = 23 , 29= 29

step:3 (i) 8 = 2×2×2 ,9 = 3×3 , 25 = 5×5 Answer

Answer 2

Step-by-step explanation:

(i) 12 = 2 × 2 × 3 , 15 = 3 × 5 , 21 = 3 × 7

(ii) 17 = 17 , 23 = 23 , 29 = 29

(iii) 8 = 2 × 2 × 2 , 9 = 3 × 3 , 25 = 5 × 5

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