Question

find the hcf of 12,15,21

Answer 1

The hcf of 12, 15 and 21 is 3.

Hope it helps! :)

Answer 2

Answer:

The HCF of 12, 15, and 21 is 3.

Step-by-step explanation:

Given: The numbers are 12, 15, and 21.

We have to find the HCF of the above numbers.

• As we know that, the HCF (Highest Common Factor) of two 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 12, 15, and 21.

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

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

The factors of 15 are: $1, 3, 5, 15$

The factors of 21 are: $1, 3, 7, 21$

From the above, we can see that 3 is the highest number among all the common factors of the given numbers.

So, the greatest common factor(HCF) is 3.