Prime Factorization

Whole numbers that are multiplied to find a product are called _____________.

• factors

• multiples

• exponents

What are the factors of 18?

• 1,18

• 1, 2, 3, 6, 9, 18

• 1, 2, 4, 8, 18

The factors of 21 are 1 and 21.

• True

• False

A whole number that has exactly two factors ( 1 and itself) is called a prime number.

• True

• False

Is the number 15 prime or composite?

• Prime

• Composite

Make a factor tree to find the prime factorization of 75.

• $2^2\times3\times5$
  

• $25\times3$
  

• $3\times5^2$

Make a factor tree to find the prime factorization of 54.

• $2\times3\times9$

• $3^2\times6$

• $2\times3^3$

Make a factor tree to find the prime factorization of 120.

• $2\times3\times5\times7$

• $2^3\times3\times5$

• $2^3\times15$

 $2\times3\times5\times7$  is the prime factorization of what number?

• 210

• 30

• 150

 $3\times5^2\times11\$ is the prime factorization of what number?

• 39

• 275

• 825