The sum of prime factors of 63

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answer is B.

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Detailed Solution

Concept: We must first determine the factor of 63 and then the prime factor of 63; the sum of these two calculations will provide the necessary response. The process of determining which prime numbers combine to form the original number is known as "prime factorization."
1,3,7,9,21,63 are the factors of 63.
Therefore, the prime factor of 63 is 3,7.
Simply choosing the prime numbers from among all the factors of the numbers will yield the prime factors.
So, the response we need is

Hence, option 2 is correct.

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