Question

The sum of all the prime factors of $196$ is prime or composite?

• A. Prime
• B. Composite

Answer 1

The correct option is B Composite

Factors of $196=2\times 2\times 7\times 7$.
It consist of $2$ and $7$ as a prime factors.
On adding them we get the number $7+2=9$.

Composite number: A number, which have factors other than 1 and itself, is called composite number.

Here, the sum of all prime factors of the number is 9 and 9 has factors $1,3,9$.
Hence, 9 is a composite number.