Understanding Prime and Composite Numbers

In this video tutorial, Earl introduces the concepts of prime and composite numbers. Prime numbers are defined as whole numbers with only two factors: itself and one. Composite numbers have more than two factors. The video provides examples of each type, such as 3 being a prime number and 8 being a composite number. The importance of understanding these concepts is highlighted, as it aids in tackling fractions, factoring, and equations. The video concludes with practice examples and encourages viewers to continue practicing.

What are prime numbers?

• Numbers with more than two factors

• Numbers that are divisible by 10

• Numbers with only two factors: 1 and itself

• Numbers that are even

Which of the following is a prime number?

• 8

• 3

• 6

• 4

Which multiplication gives the product of a prime number?

• 1 x 3

• 2 x 2

• 1 x 4

• 2 x 4

What is a factor?

• A number that is divided by another number

• A number that is subtracted from another number

• A number that is added to another number

• A number that divides another number

Which of the following numbers is only divisible by 1 and itself?

• 9

• 15

• 17

• 20

What defines a composite number?

• A number with only one factor

• A number that is a multiple of 5

• A number with more than two factors

• A number with exactly two factors

Which of the following is a composite number?

• 2

• 3

• 8

• 5

Why is it important to know if a number is prime or composite?

• It helps in understanding fractions and equations

• It is necessary for addition

• It is used in subtraction

• It is only important for division

How many factors does the number 12 have?

• 2

• 8

• 6

• 4

Is the number 17 a prime or composite number?

• Prime

• Composite

• Neither

• Both