Question

Find the HCF. () 25, 40​

Answer 1

Answer:

HCF of 25 and 40 is 5.

Step-by-step explanation:

HCF of 25 and 40 by Listing Common Factors

• Factors of 25: 1, 5, 25

• Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40

There are 2 common factors of 25 and 40, which are 1 and 5. Therefore, the highest common factor of 25 and 40 is 5.

HCF of 25 and 40 by Prime Factorization

Prime factorization of 25 and 40 is (5 × 5) and (2 × 2 × 2 × 5) respectively. As visible, 25 and 40 have only one common prime factor i.e. 5. Hence, the HCF of 25 and 40 is 5.

Answer 2

Answer:

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