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

The video tutorial explains how to express the number 56 as a product of its prime factors. It begins with a brief introduction to prime numbers, highlighting their unique properties. The tutorial then demonstrates the factor train method to break down 56 into its prime components, resulting in 2 * 2 * 2 * 7. The video also discusses the importance of understanding prime numbers and how to express numbers in index form, emphasizing the marks awarded for correct answers.

Which of the following numbers is the first prime number?

• 1

• 2

• 3

• 4

What is the product of the prime factors of 56?

• 3 * 3 * 3 * 7

• 2 * 2 * 3 * 7

• 2 * 3 * 3 * 7

• 2 * 2 * 2 * 7

Which method is commonly used to find the prime factors of a number?

• Subtraction method

• Division method

• Factor tree method

• Addition method

How many marks are awarded for correctly expressing a number as a product of its prime factors?

• 3 marks

• 1 mark

• 4 marks

• 2 marks

Why is it important to express numbers as a product of prime factors?

• It helps in addition.

• It simplifies multiplication.

• It is a fundamental concept in mathematics.

• It is used in subtraction.