Understanding Prime and Composite Numbers

The video tutorial explains the concepts of prime and composite numbers. It begins with an introduction to these concepts, followed by examples to illustrate the differences. Prime numbers have only two factors: one and itself, while composite numbers have additional factors. The video also covers the rules for identifying prime and composite numbers and demonstrates prime factorization using the numbers 30 and 31. The tutorial concludes with a summary of the key differences between prime and composite numbers.

Which of the following numbers is a prime number?

• 10

• 7

• 8

• 12

Tags

CCSS.4.OA.B.4

What is a composite number?

• A number that is odd

• A number that is even

• A number with only two factors: 1 and itself

• A number with more than two factors

Tags

CCSS.4.OA.B.4

Which of the following is a factor of 30?

• 13

• 2

• 11

• 7

What is the prime factorization of 30?

• 3 x 5 x 7

• 2 x 3 x 5

• 2 x 2 x 5

• 2 x 3 x 7

Tags

CCSS.2.OA.C.3

Which number is not divisible by 2?

• 30

• 28

• 31

• 24

Tags

CCSS.4.OA.B.4

What distinguishes a prime number from a composite number?

• A composite number is always odd

• A prime number has only two factors: 1 and itself

• A prime number has more than two factors

• A composite number has only two factors

Tags

CCSS.4.OA.B.4