Question

What is the prime factor of 8
What is the prime factor of 12
What is the prime factor of 20
What is the prime factor of 30
What is the prime factor of 56
What is the prime factor of 70

Answer 1

Prime factor is a factor that is a prime number.
Prime factors of :
8 : 2 × 2 × 2. Also can be written as
${2}^{3}$
12 : 2 × 2 × 3. Also can be written as
${2}^{2} \times 3$

20 : 2 × 2 × 5. Also can be written as
${2}^{2} \times 5$

30 : 2 × 3 × 5

56 : 2 × 2 × 2 ×7. Also can be written as
${2}^{3} \times 7$

70 : 2 × 5 × 7

You can find all of them by using Factor Tree [ as shown in the picture] or Dividing by prime numbers.

Answer 2

Prime factorizing 8, 12, 20, 30, 56, and 70:

8=2*2*2

12=2*2*3

20=2*2*5

30=2*3*5

56=2*2*2*7

70=2*5*7