## How do you find factors of a number?

With the help of prime factorisation method, we can **determine** the prime **factors** of a **number**.

Finding **Factors** Using Prime Factorisation.

Steps | Prime factors |
Division |
---|---|---|

Divide 144 by 2 | 2 | 144 ÷ 2=72 |

Divide 72 by 2 | 2 | 72 ÷ 2 = 36 |

Divide 36 by 2 | 2 | 36 ÷ 2 = 18 |

Divide 18 by 2 | 2 | 18 ÷ 2 = 9 |

## What are the factors of 10 and 30?

Common **Factors of 10 and 30**: 1, 2, 5, **10**.

## What is a factor of 30 and a multiple of 3?

Example: **30** = **3** × 10, so **3** and 10 are **factors of 30** and **30** is a **multiple of 3** and 10. Every **factor** of a number is an exact divisor of that number.

## What are the factors of 28?

The factors of 28 are the numbers, which on multiplication in pairs results in the original number. These factors are 1,2,4,7,14 and 28. Since, 2 **x** 14 = 28, therefore (2,14) is a pair factor of number 28.

## How do you find factors quickly?

Finding **Factors Quickly**

Establish the number you want to find the **factors** of, for example 24. Find two more numbers that multiply to make 24. In this case, 1 x 24 = 2 x 12 = 3 x 8 = 4 x 6 = 24. This means the **factors** of 24 are 1, 2, 3, 4, 6, 8, 12 and 24.

## What is the common multiple of 10 and 30?

The LCM of **10 and 30** is **30**.

## What is the HCF of 10 15 and 30?

Answer: 5 is the **HCF** of of **10**, **15 and 30**.

## What is the GCF of 30?

The product of these factors is called the **Greatest Common Factor**, or **GCF** for short. Example: **30** = (5)(3)(2)

## What are two factors of 30?

The **factors** of number **30** are 1, 2, 3, 5, 6, 10, 15 and **30**. Common **factors** are the numbers which are common for **two** or more numbers.

## What are 3 factors of 30 that are not factors of 15?

30 is a composite number. 30 = 1 **x** 30, 2 **x** 15, 3 **x** 10, or 5 **x** 6. Factors of 30: 1, 2, 3, 5, 6, 10, 15, 30. **Prime factorization**: 30 = 2 **x** 3 **x** 5.

## What is a multiple of 30?

Multiples of 30: 30, 60, 90, 120, 150, 180, 210, 240, 270, **300**, 330 Common multiples of 25 and 30 include 150 and **300**.

## What are the factors of 20 and 30?

The numbers 20 and 30 have the factors 2 and 5 in common. Next, multiply the common factors to find the GCF. If there is only one **common factor**, there is no need to multiply. The GCF of 20 and 30 is 10.

## What are the factors of 20 and 28?

**Factors of 20** are 1, 2, 4, 5, 10, **20**. **Factors** of **28** are 1, 2, 4, 7, 14, **28**. So, the **factors** which are common to both of the given numbers are 1, 2, and 4.

## What are the factors of negative 28?

The list of Negative Factors of 28 are: -1, -2, -4, **-7**, -14, and -28.