Question

find the HCF of 15 ,20 and 25
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Answer 1

Prime factors of 15 = 3×5

Prime factors of 20 = 2×2×5

Prime factors of 25 = 5×5

H.C.F. → 5

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Answer 2

Answer:

HCF of 15 ,20 and 25 = 5

Step-by-step explanation:

To find,

HCF of 15,20 and 25

Solution:

HCF of two or more numbers is the greatest number that divides the given numbers

To find the HCF of three numbers using prime factorization

15 = 3× 5

20 = 2×2×5 = 2²×5

25 = 5×5 = 5²

The common factors of 15,20,25 = 5

∴HCF of 15 ,20 and 25 = 5

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