Page 15 - E-Book prim 4

Delta Modern Language Schools

Primary stage
Maths Department

Prim 4 2024-2025

Unit (6): Factors and multiple
Lesson 1&2: Identifying factors of whole numbers – prime

and composite numbers

A factor is: a number multiplied by another number to get a product

2 × 9 = 18

Factor Factor Product

You can arrange the factors of numbers by different

ways For example:

factors of 18

Factor tree factor rainbow

1 18 1 2
2 6 9 3 9 18
3 6

Factor T chart

1 18

2 9

3 6

Prime and composite numbers:

Prime number: a whole number greater than 1 and has exactly two

different factors 1 and itself Ex: - 2 , 3 , 5

Composite number:- is a whole number greater than 1 and has more

than two factors Ex:- 4 , 6 ,18

13