Exponents and Prime Factors

Which of the following is a prime number?

• 49
• 53
• 66
• 81

All of these are prime except

• 33
• 19
• 2
• 73

Is 5 prime or composite? 

• Prime
• Composite

What number is never allowed on a factor tree by itself?

• 13 (it's bad luck!)

• 1

• 8675309

• 2

Using a Factor Tree, find the prime factorization of 75 in exponential form.

• 3 × 5²
• 3² × 5
• 5 × 15
• 3² × 5²

Using a Factor Tree, find the prime factorization of 54 in exponential form.

• 3² x 6
• 2 × 3³
• 2³ x 3
• 6 × 9

Using a Factor Tree, find the prime factorization of 100 in exponential form.

• 10 × 10

• 5⁴

• 4 x 25

• 2² × 5²

Using a Factor Tree, find the prime factorization of 24 in exponential form.

• 2³ x 3
• 2² x 3 x 4
• 2² × 3²
• 2 × 12

Using a Factor Tree, find the prime factorization of 150 in exponential form.

• 2³ × 3 × 5

• 15¹⁰

• 2 × 3 × 5²

• 3 × 5³

Using a Factor Tree, find the prime factorization of 180 in exponential form.

• 2× 3 × 5 × 6

• 2 × 3² × 5²

• 2² × 3² × 5

• 10 x 18