Question

What is the prime factorization of 180? 2 • 2 • 3 • 3 • 5 2 • 2 • 45 2 • 3 • 3 • 5 2 • 9 • 5

Answer 1

A: 2.2.3.3.5

Explanation:

All the numbers that are part of this prime factorization are prime numbers (they can only be divided by themselves and by 1: The numbers are: 2, 3 and 5.

2 is the only even prime number.

In B, 45 is not a prime number because it can be divided by 3 or 5.

In C, 9 is not a prime number because it can be divided by 3.

45 and 9 are composite numbers.

Answer 2

= 2*2*3*3*5

Explanation:

The prime factorization of a number means reducing the number to its primes

180 = 20*9

= 4*5 * 3*3

= 2*2 * 5 * 3 *3

Rewriting in order from smallest to largest

= 2*2*3*3*5