Question

$(7\times 11\times 13+13)$ is a/an

• A. Composite number
• B. Prime number
• C. Irrational number
• D. Imaginary number.

Answer 1

The correct option is A Composite number

$(7\times 11\times 13+13)=13\left\{\right(7\times 11)+1\}=13\times 78=1014$

Since, $1014$ is divided by $13,78$ which is other than $1$ and the number itself, so it is a composite number.