Question

Which of the following shows the prime factorisation of 90 ?
a) 2 x 3 x 15
b) 2 x 3 x 3 x 5
c) 6 x 3 x 5
d) 2 x 9 x 5

Answer 1

Answer:

The prime factorization of 90 is 2 × 3 × 3 × 5 or 2 × 3² × 5.

Answer 2

prime factorisation of 90 is 1.2.3.5.6.9.10.15.18