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

The video tutorial explains how to find odd numbers that are factors of 36 and multiples of three. It begins by listing all factors of 36, then identifies which of these are multiples of three. Finally, it narrows down the possibilities to the odd numbers that meet both criteria, which are three and nine. The tutorial also outlines the marks allocation for the problem, emphasizing the importance of listing factors and identifying the correct numbers.

What are the criteria for the numbers Margaret is thinking of?

• Even numbers that are factors of 36

• Odd numbers that are factors of 36 and multiples of three

• Odd numbers that are multiples of 36

• Prime numbers that are factors of 36

Which of the following is a factor of 36?

• 11

• 5

• 9

• 7

What is a factor pair of 36?

• 8 and 4

• 5 and 7

• 10 and 3

• 6 and 6

Which of these numbers is both a factor of 36 and a multiple of three?

• 5

• 11

• 7

• 9

How many marks were awarded for listing the factors of 36?

• Two marks

• Four marks

• One mark

• Three marks