Question

Find the HCF of 15,28,30​

Answer 1

Step-by-step explanation:

Find the HCF of 15 and 28

Greatest common factor (GCF) of 15 and 28 is 1. We will now calculate the prime factors of 15 and 28, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15 and 28

Answer 2

Answer:

The HCF of 15, 28, and 30​ is 1.

Step-by-step explanation:

Given: The numbers are 15, 28, and 30​.

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 15, 28, and 30​.

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

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

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

The factors of 30 are: $1, 2, 3, 5, 6, 10, 15, 30$

 From the above, we can see that 1 is the highest number among all the common factors of the given numbers.

So, the greatest common factor(HCF) is 1.