Question

Identify the type of set

$A=\{x:xisneitherprimenorcomposite\}$

• A. Empty Set
• B. Singleton Set
• C. Infinite Set
• D. Finite Set

Answer 1

Answer: (B)

Singleton Set

We have to identify the type of set.
Given $A=\{x:xisneitherprimenorcomposite\}$
The only number which is neither prime nor composite is $1$.
$\therefore A=\left\{1\right\}$ which is a singleton set.
Therefore $A$ is a singleton set.