Question

Which of the following represents the prime factorisation of 60?

• A. 2 x 2 x 3 x 5
• B. 2 x 2 x 5
• C. 2 x 2 x 3
• D. 2 x 2 x 3 x 5 x 5

Answer 1

Answer: (A)

2 x 2 x 3 x 5

Prime factorisation is expressing a number as the product of its prime factors.

60 = 2 x 30
= 2 x 2 x 15
= 2 x 2 x 3 x 5
(2, 3 and 5 are prime numbers)

Hence, the prime factorisation of 60 is 2 x 2 x 3 x 5.