Question

3. Find the LCM and HCF of the following integers by applying the prime factorisation
method.
(1) 12, 15 and 21 (ii) 17,23 and 29
(111) 8.9 and 25​

Answer 1

Answer:

ans

1. the HCF of 12,15,21 is

12 = 2×2×3

15 = 3×5

21 = 3×7

HCF = 3

2. the HCF of 17 ,23 ,29 is

17 = 1×17

23 = 1×23

29 = 1×29

HCF = 1

3. the HCF is 8, 9 ,25

8 = 2×2×2

9 = 3×3

25 = 5×5

HCF = 1

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Answer 2

Answer:

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