Factors And Multiples

A factor (divisor) of a number is a number that can divide it evenly (that is, without a remainder). For example, the factors of 24 are 1, 2, 3, 4, 6, 12 and 24.  A common factor of x and y is a number that is a factor of of x and also of y. For example, 6 is a common factor of 24 and 39. A prime factor is a factor that is also a prime number. For example, the prime factor of 24 are 2 and 3. When the word “divisible” appears in a question, it means “evenly divisible” or “divisible without a remainder.”

Number Factor
1 1
2 1, 2
3 1, 3
4 1, 2, 4
5 1, 5
6 1, 2, 3, 6
7 1, 7
8 1, 2, 4, 8
9 1, 3, 9
10 1, 2, 5, 10
11 1, 11
12 1, 2, 3, 4, 6, 12
13 1, 13
14 1, 2, 7, 14
15 1, 3, 5, 15
16 1, 2, 4, 8, 16
17 1, 17
18 1, 2, 3, 6, 9, 18
19 1, 19
20 1, 2, 4, 5,10,20
21 1, 3, 7, 21
22 1, 2, 11, 22
23 1, 23
24 1, 2, 3, 4, 6, 8, 12, 24
25 1, 5, 25

Note: The only number that has one factor is one (1)

 

MULTIPLE

A multiple of a number is a number that is evenly divisible by it. For example, 16, 32, and 88 are multiples of 8.

14, 21, 28 are multiple of 7

E.g: what are the first 3 multiple of 2, 4, 6, 10 and 12?

2 = 2, 4, 6

4 = 4, 8, 12

6 = 6, 12, 18

10 = 10, 20, 30

12 = 12, 24, 36

Quiz

  1. Write out the factors of 64
  2. Find the LCM of 8, 12 and 16.

 

School Admin? Grow your school faster with Africa's most trusted school management software

Get more class notes, videos, homework help, exam practice on Android [DOWNLOAD]

Get more class notes, videos, homework help, exam practice on iPhone [DOWNLOAD]

2 thoughts on “Factors And Multiples”

Leave a Reply

Your email address will not be published. Required fields are marked *

Don`t copy text!