Prime and Composite Numbers Concepts

The video tutorial explains the concepts of prime and composite numbers, detailing how to identify them and their properties. It covers the divisibility rules that help determine if a number is prime and provides examples of prime numbers up to 100. The tutorial also lists the factors of several composite numbers, demonstrating how to break down numbers into their factors.

Which of the following is a prime number?

• 17

• 1

• 4

• 20

What makes a number composite?

• It has only one factor.

• It has more than two factors.

• It is an even number.

• It has exactly two factors.

Which of these numbers is not a factor of 24?

• 8

• 2

• 5

• 6

What is the only even prime number?

• 4

• 2

• 0

• 6

Which number is not prime: 29, 31, 33, or 37?

• 31

• 37

• 29

• 33

What is the divisibility rule for 3?

• The number is a multiple of 10.

• The number is even.

• The sum of the digits is a multiple of 3.

• The number ends in 0 or 5.

Which of the following numbers is a factor of 60?

• 8

• 10

• 11

• 7

How many factors does the number 81 have?

• 2

• 3

• 4

• 5

Which of these numbers is a factor of 99?

• 8

• 10

• 9

• 12

What is the product of the factors 3 and 27?

• 99

• 90

• 81

• 54