Question

The number $23$ is:
A. a prime number B. a real number
C. an irrational number D. a rational number

• A. $A,B,D$ are correct
• B. $A,B,C$ are correct
• C. $B,C,D$ are correct
• D. $A,C,D$ are correct

Answer 1

The correct option is A $A,B,D$ are correct

The number $23$ is a prime number as it has only factors $1$ and itself.
It is a rational number as it can expressed as a ratio $\frac{23}{1}$.
$23$ is also a real number as it can represented on a number line.
Hence $A,B$ and $D$ are correct.