Prime and Composite Numbers Concepts

The video tutorial covers the concepts of prime and composite numbers, explaining how to identify them through examples and exercises. It includes a practical voting example to illustrate prime numbers and discusses the prime numbers in the 90s. The tutorial also explains why the product of two prime numbers is not prime and demonstrates converting coins to dollars. Finally, it involves selecting prime and composite numbers from a list.

What is a prime number?

• A number with more than two factors.

• A number with exactly two distinct factors.

• A number that is even.

• A number with only one factor.

Which of the following is a composite number?

• 3

• 5

• 2

• 4

Why is 31 considered a prime number?

• It is an even number.

• It is only divisible by 1 and itself.

• It is divisible by 3.

• It is divisible by 2.

In a pictograph, which flower received a prime number of votes?

• Roses

• Daffodils

• Tulips

• Daisies

Which number in the 90s is a prime number?

• 95

• 91

• 93

• 97

What is the product of two prime numbers?

• Always prime

• Always composite

• Sometimes prime, sometimes composite

• Always even

How many dollars does Janelle have after exchanging her coins?

• $8.00

• $7.72

• $7.00

• $7.50

Why is the number one neither prime nor composite?

• It is a perfect square.

• It has no factors.

• It has only one factor.

• It is an even number.

Which of the following numbers is prime?

• 17

• 52

• 63

• 92

Which of the following numbers is composite?

• 89

• 39

• 61

• 37