Question

What is the prime factorisation of 272 ?

• A. $2\times 2\times 2\times 2\times 7$
• B. $2\times 2\times 3\times 3\times 17$
• C. $2\times 2\times 2\times 2\times 17$
• D. $2\times 2\times 3\times 2\times 17$

Answer 1

The correct option is C $2\times 2\times 2\times 2\times 17$

272 can be factorised as following:

$\begin{array}{cc}2& 272\\ 2& 136\\ 2& 68\\ 2& 34\\ 17& 17\\ & 1\end{array}$

Thus, 272 = $2\times 2\times 2\times 2\times 17$