Question

Find the prime factors of the following numbers:

(1) 120

Answer 1

The prime factorization of the number 120 by successive division method is given as follows:
$\begin{array}{cc}2& 120\\ 2& 60\\ 2& 30\\ 3& 15\\ 5& 5\\ & 1\end{array}$
⇒ 120 = 2 × 2 × 2 × 3 × 5
Thus, the prime factors are 2, 3 and 5.