Exploring Prime and Composite Numbers

The video tutorial introduces natural numbers, explaining that they can be divided into prime and composite numbers. Prime numbers have only two factors: one and the number itself, while composite numbers have more than two factors. Examples of each type are provided. Key points include that one is neither prime nor composite, two is the smallest and only even prime number, and three is the smallest odd prime number. The video concludes with a task to list prime and composite numbers from one to one hundred.

What are the set of numbers 1, 2, 3, 4, 5, 6, 7, 8, and so on called?

• Whole numbers

• Rational numbers

• Natural numbers

• Integers

Which of the following is a characteristic of natural numbers?

• They include fractions

• They are always positive

• They start from zero

• They include negative numbers

Tags

CCSS.6.NS.C.6A

What are the factors of a prime number?

• 1, 2, and the number itself

• 1 and the number itself

• 1, 2, 3, and the number itself

• Only the number itself

Tags

CCSS.4.OA.B.4

Which of the following is a prime number?

• 15

• 11

• 6

• 4

Tags

CCSS.4.OA.B.4

What defines a composite number?

• It has no factors

• It has more than two factors

• It has exactly two factors

• It has only one factor

Tags

CCSS.4.OA.B.4

Which of the following is a composite number?

• 7

• 13

• 19

• 20

Tags

CCSS.4.OA.B.4

Why is the number 1 neither prime nor composite?

• It has only one factor

• It is an even number

• It is a negative number

• It is a fraction

Tags

CCSS.4.OA.B.4

Which is the smallest and only even prime number?

• 4

• 1

• 2

• 3

Tags

CCSS.4.OA.B.4

Which is the smallest odd prime number?

• 1

• 2

• 3

• 5

Tags

CCSS.4.OA.B.4

What activity is suggested at the end of the video?

• Listing all natural numbers from 1 to 100

• Listing all prime and composite numbers from 1 to 100

• Listing all odd numbers from 1 to 100

• Listing all even numbers from 1 to 100

Tags

CCSS.4.OA.B.4