Question

Which of the following is the prime factorization of $63?$

• A. $3\times 21$
• B. $7\times 9$
• C. $1\times 63$
• D. $3\times 3\times 7$

Answer 1

The correct option is D $3\times 3\times 7$

Let's find the prime factorization using ladder method:

So, prime factorization of $63=3\times 3\times 7$