Exploring Prime Numbers

What is the first prime number?

• 1

• 3

• 2

• 5

Is 15 a prime number?

• It has three factors

• No

• It is only divisible by 1

• Yes

List all the prime numbers between 1 and 30.

• [2, 3, 5, 7, 11, 13, 17, 19, 23, 29]

• 4, 6, 8, 10, 12, 14, 16, 18, 20, 22

• 21, 22, 24, 25, 26, 27, 28, 30

• 1, 4, 6, 8, 9, 10, 12, 14, 15, 16

What are the factors of 28?

• 1, 2, 3, 5, 7, 14

• 3, 5, 6, 9, 10, 12

• [1, 2, 4, 7, 14, 28]

• 4, 8, 16, 20, 24, 30

Determine if 23 is a prime number.

• Yes, 23 is a prime number.

• 23 is an even number.

• 23 is a composite number.

• 23 is divisible by 3.

What is the prime factorization of 60?

• 2^3 × 3 × 5

• 3 × 4 × 5

• 2 × 2 × 3 × 10

• 2^2 × 3 × 5

Identify the next prime number after 31.

• 33

• 29

• 41

• 37

How many prime numbers are there between 1 and 50?

• 25

• 20

• 10

• 15

Is 1 considered a prime number? Why or why not?

• No, 1 is not considered a prime number.

• 1 is considered a prime number since it is the first natural number.

• Yes, 1 is a prime number because it is only divisible by itself.

• 1 is a prime number as it has exactly two distinct positive divisors.

What are the factors of 49?

• [1, 5, 10]

• [1, 7, 49]

• [2, 14, 49]

• [3, 7, 21]