Question

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Answer 1

Step-by-step explanation:

a) 4 and 8

prime factorisation of 4 and 8:

4 = 2×2

8 = 2×2×2

(2×2 is common in both the prime factorisation)

So, the HCF is 4

b) 4 and 10

prime factorisation of 4 and 10:

4 = 2×2

10 = 2×5

(2 is common in both the prime factorisation)

So, the HCF is 2

d) 9 and 12

prime factorisation of 9 and 12:

9 = 3×3

12 = 2×2×3

(3 is common in both the prime factorisation)

So, the HCF is 3

e) 10 and 25

prime factorisation of 10 and 25:

10 = 2×5

25 = 5×5

(5 is common in both the prime factorisation)

So, the HCF is 5