Use the divisibility rules to help determine the prime factorization of the number below. 63
A) $3 \cdot 3 \cdot 7$
B) $3 \cdot 3 \cdot 3 \cdot 7$
C) $3.5 .7$
D) $3 \cdot 3 \cdot 8$
E) none of these

Question

Quizplus · Accepted Answer

63 is divisible by 3 (since the sum of its digits, 6 + 3 = 9, is divisible by 3), and 63 divided by 3 is 21. 21 is also divisible by 3 (2 + 1 = 3), and 21 divided by 3 is 7, which is a prime number. Therefore, the prime factorization of 63 is $3 \cdot 3 \cdot 7$.

Use the Divisibility Rules to Help Determine the Prime Factorization 3⋅3⋅73 \cdot 3 \cdot 73⋅3⋅7

Use the Divisibility Rules to Help Determine the Prime Factorization $3 \cdot 3 \cdot 7$