GCSE Secondary Maths Age 13-17 - Number: Multiples, Factors & Prime Factors - Explained

The video tutorial explains how to find all the factors of 30 by identifying numbers that divide evenly into 30. It then explores the factor pairs of 30, such as 5 and 6, 3 and 10, and 2 and 15. The tutorial concludes with an explanation of the scoring criteria for a related question, where full marks are awarded for identifying all factors correctly, and partial marks for identifying three or more correct factors without errors.

Which of the following numbers is a factor of 30?

• 8

• 3

• 7

• 11

What is the product of the factor pair 5 and 6?

• 35

• 30

• 25

• 11

Which of the following is not a factor pair of 30?

• 3 and 10

• 2 and 15

• 4 and 8

• 1 and 30

How many marks are awarded for identifying all factors of 30 correctly?

• 3 marks

• 2 marks

• 1 mark

• 4 marks

What is the minimum number of correct factors needed to earn one mark?

• 1

• 4

• 3

• 2