Question

find the HCF of 20,28,36

Answer 1

factors of 20=1,2,4,5,10,20
factors of 28=1,2,4,7,14,28
factors of 36=1,2,3,4,6,9,12,18,36
hcf=4

Answer 2

Answer:

The HCF of 20, 28, and 36 is 4.

Step-by-step explanation:

Given: The numbers are 20, 28, and 36.

We have to find the HCF of the above numbers.

• As we know, the HCF (Highest Common Factor) of two or more numbers is the highest number among all the common factors of the given numbers.
• HCF is also known as the greatest common factor.

We are solving in the following way:

We have,

The numbers are 20, 28, and 36.

First, we will find the factors of the above numbers.

The factors of 20 are: $1, 2, 4, 5, 10, 20$

The factors of 28 are: $1, 2, 4, 7, 14, 28$

The factors of 36 are: $1, 2, 3, 4, 6, 9, 12, 18, 36$

 From the above, we can see that 4 is the highest number among all the common factors of the given numbers.

So, the greatest common factor(HCF) is 4.