Question

which number is composite?1 : ( 5 )2 : ( 11 )3 : ( 9 )4 : ( 2 )

Answer 1

Answer:

The composite number is 9;

$3\colon(9)$

Explanation:

Composite numbers are numbers that are not prime numbers.

That is numbers that have factors other than 1 and itself.

From the given options, let find the factors of each option;

$\begin{gathered} 5\rightarrow1,5 \\ 11\rightarrow1,11 \\ 9\rightarrow1,3,9 \\ 2\rightarrow1,2 \end{gathered}$

So, the only non-prime number there is 9 because it has factors other than 1 and itself.

Therefore, the composite number is 9;

$3\colon(9)$