Exponents and Prime Factors

Which of the following is a prime number?

• 49
• 53
• 66
• 81

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

• 3 × 5²
• 3² × 5
• 5 × 15
• 3² × 5²

What is the expanded notation of 3³ x 5 x 7²?

• 3 x 3 x 3 x 5 x 7
• 9 x 5 x 14
• 3 x 3 x 5 x 5 x 7 x 7
• 3 x 3 x 3 x 5 x 7 x 7

What is the prime factorization of 120?

• 2³ x 3 x 5
• 2 x 3 x 4 x 5
• 3 x 5 x 8
• 2² x 3² x 5

Which is GREATER?
2⁷ or 7²

• 2⁷
• 7²
• Neither, they are equal

4⁰

• 0
• 1
• 4
• -4

I am a prime number between 30 and 40.  Which number could I be?

• 31
• 33
• 36
• 39

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

• 10 × 10

• 5⁴

• 4 x 25

• 2² × 5²

Jaselyn and Ky are working on the prime factorization of 63. Read their explanations and decide which student is correct.

• Jaselyn said the prime factorization of 63 is 7 x 9 because 7 times 9 is 63.

• Ky said the prime factorization of 63 is 3² x 7 because 3² times 7 equals 63 and the bases in his answer are all prime.

What is a Prime Number?

• A number that has more than two factors

• An Odd Number

• A number that only has two factors; one and itself.

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