Prime Factorization, Prime Numbers & Divisibility Rules

The following prime factorization represents which number:  2² x 3 x 7

• 14
• 84
• 42
• 70

A prime number...

• has one factor.
• has more than 2 factors.
• has 100 factors.
• has exactly 2 factors: 1 and the itself.

Tags

CCSS.4.OA.B.4

A composite number ...

• has more than 2 factors.
• has one factor.
• has at least 10 factors.
• is always a really big number.

Tags

CCSS.4.OA.B.4

Find the prime factorization of 100 in exponential form.

• 10 × 10

• 5⁴

• 4 x 25

• 2² × 5²

Find the prime factorization of 75 in exponential form.

• 3 × 5²
• 3² × 5
• 5 × 15
• 3² × 5²

What is the prime factorization of 18?

• 9 x 2
• 3 x 2²
• 3² x 2
• 3³

What is the prime factorization of 24 written in exponential notation?

• 2³ x 3

• 2² x 3 x 4

• 2² x 3

• 3 x 8

Which number is divisible by both 2 and 5?

• 150

• 151

• 152

• 153

Tags

CCSS.4.OA.B.4

Determine if the number 408 is divisible by 6.

• Yes

• No

Tags

CCSS.4.OA.B.4

Which of the following numbers is divisible by 9?

• 234

• 235

• 236

• 237

Tags

CCSS.4.OA.B.4