Question

Find the prime factorisation of 99.

• A. $9\times 11$
• B. $2\times 3\times 11$
• C. $3\times 3\times 11$
• D. $3\times 3\times 3\times 11$

Answer 1

The correct option is C $3\times 3\times 11$

We need to express the number 99 as the product of its prime factors.

$\Rightarrow 99=9\times 11$
$\Rightarrow 99=3\times 3\times 11$
Hence the prime factorisation of 99 is $3\times 3\times 11$