Year 7
These resources will be removed by end of Summer Term 2025.
Switch to our new teaching resources now - designed by teachers and leading subject experts, and tested in classrooms.
Lesson details
Key learning points
- In this lesson, we will investigate how to write a number as a product of its prime factors. We investigate the concept of prime factorisation
Licence
This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.
Loading...
5 Questions
Q1.
Which of these numbers is not prime?
13
2
31
Q2.
Which of these numbers is prime?
57
75
87
Q3.
Which of these is the prime factorisation of 30?
2 x 15
2 x 2 x 5
5 x 6
Q4.
Which of these is the prime factorisation of 50?
1 x 50
2 x 25
5 x 10
Q5.
What is the final digit for this number:
1
7
9
5 Questions
Q1.
Express 42 as a product of its prime factors
2 x 21
2 x 3 x 3
6 x 7
Q2.
Express 144 as a product of its prime factors.
12 x 12
2 x 2 x 3 x 3 x 3 x 3
2 x 6 x 2 x 6
Q3.
Express 80 as a product of its prime factors.
2 x 2 x 2 x 10
2 x 4 x 2 x 5
8 x 10
Q4.
Express 35 x 10 as a product of its prime factors.
35 x 2 x 5
350
5 x 7 x 10
Q5.
Express 1750 as a product of its prime factors
10 x 175
2 x 5 x 175
2 x 5 x 5 x 35