Question

Find the HCF of 20,35, and 45

Answer 1

Answer:

hcf. = 9 5 is common in all

Answer 2

The answer is 5.

Given: Numbers = 20, 35, 45

To Find: H.C.F of the given values

Solution:

Prime factorization of 20 = 2 × 2 × 5

Prime factorization of 35 = 7 × 5

Prime factorization of 45 = 5 × 3 × 3

Common factors of the three numbers = 5

∴ H.C.F of 20, 35, 45 = 5

Answer) The H.C.F is 5.

Note

• H.C.F refers to Highest Common Factor. In this sum, we look for the common factors of the given numbers.

• In the given sum, five is the only common number. Thus, it is the highest common factor.

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