Question

Which of the following is a prime factorization of 84?
A. 2 x 2 x 3 x 7
B. 4 x 3 x 7
C. 2 x 2 x 21
D. 2 x 2 x 2 x 7

Answer 1

Prime numbers are numbers that can only be divided by 1 and it'self. The exception to this rule is the number 1.

84 = 2 * 42

= 2 * 2 * 21

= 2 * 2 * 3 * 7

Therefore the answer is A.

Answer 2

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