Week 7- Product of Primes, Multiples and Factors

What is a factor of a number?

List the first five multiples of 9.

Which of the following numbers is not a factor of 36?

• 3
• 6
• 12
• 14

Explain why 45 is not a multiple of 7.

List all prime factors of 30

Which of the following shows the prime factorization of 56?

• 2 × 2 × 2 × 7
• 2 × 2 × 14
• 4 × 14
• 1 × 56

Using a factor tree, express 100 as a product of its prime factors.

List all the factors of 24 and 36, then identify the highest common factor.

What is the HCF of 18 and 27?

• 3
• 6
• 9
• 12

Find the HCF of 28 and 70 using their prime factors.