Use the divisibility rules to help determine the prime factorization of the following number. 22
A) $3 \cdot 11$
B) $2 \cdot 10$
C) $4 \cdot 11$
D) $2 \cdot 11$
E) none of these

Question

Quizplus · Accepted Answer

22 is not divisible by 3 or 5. It ends in 2, so it is not divisible by 2, 4, 6, 8, or 10. But it is divisible by 11, so the prime factorization of 22 is 2 $\cdot$ 11. Choice A is also a correct factorization, but it is not listed, so D is the best choice.

Use the Divisibility Rules to Help Determine the Prime Factorization 3⋅113 \cdot 113⋅11

Use the Divisibility Rules to Help Determine the Prime Factorization $3 \cdot 11$