Prime and Composite Numbers

This video tutorial reviews prime and composite numbers. It defines prime numbers as those with only two factors: one and itself, and composite numbers as those with more than two factors. The video provides examples of each type and explains methods to identify them. It also uses a hundreds chart to illustrate prime numbers and discusses the unique case of the number one, which is neither prime nor composite.

What is a prime number?

• A number that ends in 0

• A number with only two factors: 1 and itself

• A number with more than two factors

• A number that is divisible by 2

Which of the following is a prime number?

• 15

• 11

• 6

• 4

What makes a number composite?

• It has only one factor

• It is an odd number

• It has exactly two factors

• It has more than two factors

Which of the following numbers is composite?

• 9

• 5

• 3

• 2

Is the number 21 prime or composite?

• Prime

• Composite

• Neither

• Both

What are the factors of 33?

• 1, 2, 16, 33

• 1, 7, 11, 33

• 1, 3, 11, 33

• 1, 5, 11, 33

Which number is a prime number?

• 22

• 33

• 77

• 59

What is unique about the number 2?

• It is divisible by 3

• It is a composite number

• It is the largest prime number

• It is the only even prime number

Which of the following is a multiple of 5?

• 13

• 17

• 10

• 7

How can you identify a composite number using a hundreds chart?

• It is a number that is always odd

• It is a number that is not divisible by any other number

• It is a number that appears only once

• It is a number that has multiple factors