GCSE Secondary Maths Age 13-17 - Number: Factors - Explained

The video tutorial explains how to find all the factors of 20, emphasizing that factors come in pairs. It starts with the often-overlooked factor 1 and its pair 20, then moves on to other factors like 2 and 10. The tutorial also discusses why certain numbers like 3 and 6 are not factors of 20. Finally, it outlines the scoring criteria for identifying factors, with marks awarded for finding three or more factors and all factors of 20.

What is the first factor of any number that is often overlooked?

• 2

• 1

• 20

• 10

Which number, when multiplied by 2, gives 20?

• 10

• 8

• 5

• 12

Which of the following is NOT a factor of 20?

• 4

• 5

• 6

• 10

What is the factor pair of 4 in the context of 20?

• 10

• 8

• 5

• 2

How many marks are awarded for identifying all factors of 20?

• One mark

• Two marks

• Three marks

• Four marks