Chapter SH, Problem 1.20E

To determine

To find: The prime factors of the given number with the help of factor tree.

Answer to Problem 1.20E

The prime factor of the given number is $2\times 2\times 5$ .

Explanation of Solution

Given:

The given number is $18$ .

Calculation:

The given number is $20$ .

The factor tree for the given number is,

  $\begin{array}{l}20\\ 4\times 5\\ 2\times 2\times 5\end{array}$

Thus, the prime factor of the given number is $2\times 2\times 5$ .