Question

Find the prime factors of the following numbers:

(2) 324

Answer 1

The prime factorisation of the number 324 by successive division method is given as follows:
$\begin{array}{cc}2& 324\\ 2& 162\\ 3& 81\\ 3& 27\\ 3& 9\\ 3& 3\\ & 1\end{array}$
⇒ 324 = 2 × 2 × 3 × 3 × 3 × 3

Thus, the prime factors are 2 and 3.