Numbers: Primes, Composites, and Sequences

What is a prime number?

• A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

• A prime number is any even number.

• A prime number is a number that can be divided by any other number.

• A prime number is a natural number less than 1.

Identify the prime numbers from the list: 2, 4, 5, 6, 7.

• 2, 5, 7

• 5, 6, 7

• 4, 6

• 2, 4, 6

Which of the following is a composite number: 11, 13, 15, 17?

• 14

• 15

• 16

• 12

List the first five prime numbers.

• 1, 4, 6, 8, 9

• [2, 3, 5, 7, 11]

• 2, 3, 5, 7, 13

• 2, 3, 5, 7, 10

What are the factors of 12?

• 7

• 10

• [1, 2, 3, 4, 6, 12]

• 5

Is 9 a prime or composite number?

• prime

• odd

• even

• composite

Generate a number sequence starting from 1, increasing by 2 each time.

• 2, 4, 6, 8, 10, ...

• 1, 3, 5, 7, 9, ...

• 1, 2, 3, 4, 5, ...

• 0, 2, 4, 6, 8, ...

Identify the prime numbers in this sequence: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.

• 2, 4, 6, 8

• [2, 3, 5, 7]

• 1, 4, 6, 8

• 3, 5, 9, 10

What is the smallest prime number?

• 1

• 5

• 2

• 3

How many factors does the number 18 have?

• 4

• 8

• 6

• 10