Table of Contents

- 1 What is the greatest common factor of 15 20 and 25?
- 2 What is the greatest common factor of 14 20 and 10?
- 3 What are the factors of 14 and 25?
- 4 What is the HCF of 5 10 15 and 20?
- 5 What is the GCF of 2 and 9?
- 6 What is the HCF of 14 and 21?
- 7 What is the HCF of 15 and 45?
- 8 What is the GCF of 100 and 150?

## What is the greatest common factor of 15 20 and 25?

As you can see when you list out the factors of each number, 5 is the greatest number that 15, 20, and 25 divides into.

## What is the greatest common factor of 14 20 and 10?

As you can see when you list out the factors of each number, 2 is the greatest number that 10, 14, and 20 divides into.

**What is the greatest common factor of 14 20 and 4?**

There are 2 common factors of 14 and 20, that are 1 and 2. Therefore, the greatest common factor of 14 and 20 is 2.

### What are the factors of 14 and 25?

The factors of 25 are 1, 5, 25 and the factors of 14 are 1, 2, 7, 14. 25 and 14 have only one common factor which is 1. This implies that 25 and 14 are co-prime. Hence, the Greatest Common Factor (GCF) of 25 and 14 is 1.

### What is the HCF of 5 10 15 and 20?

The HCF of 5, 15 and 20 is 5. To calculate the highest common factor of 5, 15 and 20, we need to factor each number (factors of 5 = 1, 5; factors of 15 = 1, 3, 5, 15; factors of 20 = 1, 2, 4, 5, 10, 20) and choose the highest factor that exactly divides 5, 15 and 20, i.e., 5.

**What is the HCF of 25?**

To find the HCF of 25 and 40, we will find the prime factorization of the given numbers, i.e. 25 = 5 × 5; 40 = 2 × 2 × 2 × 5. ⇒ Since 5 is the only common prime factor of 25 and 40. Hence, HCF (25, 40) = 5.

#### What is the GCF of 2 and 9?

1

The GCF of 2 and 9 is 1. To calculate the greatest common factor of 2 and 9, we need to factor each number (factors of 2 = 1, 2; factors of 9 = 1, 3, 9) and choose the greatest factor that exactly divides both 2 and 9, i.e., 1.

#### What is the HCF of 14 and 21?

7

Answer: HCF of 14 and 21 is 7.

**What is the GCF of 15 and 36?**

3

Answer: GCF of 15 and 36 is 3.

## What is the HCF of 15 and 45?

15

FAQs on GCF of 15 and 45 The GCF of 15 and 45 is 15.

## What is the GCF of 100 and 150?

50

Answer: GCF of 100 and 150 is 50.

**What is the HCF of 5 10 and 15?**

Answer: HCF of 5, 10 and 15 is 5.