Table of Contents

- 1 What is the greatest common factor shared by 42 and 20?
- 2 What is the greatest factor of 42?
- 3 Which is the greatest factor for both 20 and 40?
- 4 What are the factors of 20 and 42?
- 5 What are the first 5 multiples of 42?
- 6 What is the greatest common factor of 42 and 84?
- 7 What is the GCF of 30 and 45?
- 8 What is the GCF of 20 30?
- 9 Which is the greatest common factor for 12 and 42?
- 10 How to find the greatest factor of two numbers?
- 11 Which is a factor shared between two different numbers?

The GCF of 20 and 42 is 2.

## What is the greatest factor of 42?

Solution: Factors of 42 are the numbers which divide 42 exactly without any remainder. Hence, the factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42. Prime factors of 42 are 1, 2, 3, and 7.

**What is the greatest factor of 42 and 21?**

GCF of 21 and 42 by Prime Factorization As visible, 21 and 42 have common prime factors. Hence, the GCF of 21 and 42 is 3 × 7 = 21.

### Which is the greatest factor for both 20 and 40?

GCF of 20 and 40 by Prime Factorization As visible, 20 and 40 have common prime factors. Hence, the GCF of 20 and 40 is 2 × 2 × 5 = 20.

### What are the factors of 20 and 42?

GCF of 20 and 42 is the largest possible number that divides 20 and 42 exactly without any remainder. The factors of 20 and 42 are 1, 2, 4, 5, 10, 20 and 1, 2, 3, 6, 7, 14, 21, 42 respectively.

**What is the GCF of 3 and 9?**

GCF of 3 and 9 by Listing Common Factors There are 2 common factors of 3 and 9, that are 1 and 3. Therefore, the greatest common factor of 3 and 9 is 3.

#### What are the first 5 multiples of 42?

Multiples of 42

- First five multiples of 42: 42, 84, 126, 168, and 210.
- Prime Factorization of 42: 2 × 3 × 7.

#### What is the greatest common factor of 42 and 84?

GCF of 84 and 42 by Listing Common Factors There are 8 common factors of 84 and 42, that are 1, 2, 3, 6, 7, 42, 14, and 21. Therefore, the greatest common factor of 84 and 42 is 42.

**What is the GCF of 18 and 27?**

GCF of 18 and 27 by Prime Factorization As visible, 18 and 27 have common prime factors. Hence, the GCF of 18 and 27 is 3 × 3 = 9.

## What is the GCF of 30 and 45?

15

Answer: GCF of 30 and 45 is 15.

## What is the GCF of 20 30?

10

GCF of 20 and 30 by Listing Common Factors Therefore, the greatest common factor of 20 and 30 is 10.

**What is the HCF of 20 30 and 40?**

The HCF of 20, 30, and 40 is 10. ∴ The highest number that divides 20, 30, and 40 is 10.

### Which is the greatest common factor for 12 and 42?

The Greatest Common Factor (GCF) for 12 and 42, notation CGF (12,42), is 6.

### How to find the greatest factor of two numbers?

To find the greatest common factor of two numbers just type them in and get the solution. Greatest Common Factor (GCF) of and. To get the Greates Common Factor (GCF) of 10 and 20 we need to factor each value first and then we choose all the copies of factors and multiply them: The Greates Common Factor (GCF) is: 2 x 5 = 10.

**When is the greatest common factor a common factor?**

It is a common factor when it is a factor of two (or more) numbers. The “Greatest Common Factor” is the largest of the common factors (of two or more numbers)

A common factor is a factor that is shared between two different numbers. It can also be referred to as a common divisor.