Prime factorisation

Prime Factorisation

What is Prime Factorisation?
It is a method of expressing a number as the product of its prime numbers. Example: 60 = 2 × 2 × 3 × 5.

1. Prime factorisation of 12 is:

6 × 2 4 × 3 2 × 2 × 3 12 × 1

2. Prime factorisation of 18 is:

9 × 2 6 × 3 18 × 1 2 × 3 × 3

3. Prime factorisation of 20 is:

10 × 2 2 × 2 × 5 5 × 4 20 × 1

4. Prime factorisation of 81 is:

9 × 9 27 × 3 81 × 1 3 × 3 × 3 × 3

5. Prime factorisation of 28 is:

4 × 7 2 × 2 × 7 14 × 2 28 × 1

6. What is a prime factor of 35?

6 10 5 12

7. Prime factor of 19 is:

19 3 2 1

8. Prime factorisation of 50 is:

2 × 5 × 5 10 × 5 25 × 2 50 × 1

9. Prime factorisation of 60 is:

6 × 10 4 × 15 2 × 2 × 3 × 5 5 × 12

10. Prime factorisation of 36 is:

6 × 6 9 × 4 36 × 1 2 × 2 × 3 × 3