Whole Numbers Session 3

What is the smallest prime number?

• 2

• 5

• 1

• 3

Is 1 a prime number? Why or why not?

• No

• Yes

• Maybe

• Sometimes

List all the factors of 24.

• 1, 2, 4, 6, 8, 12, 16, 24

• 1, 2, 3, 4, 6, 8, 12, 24

• 1, 2, 3, 5, 8, 10, 12, 24

• 1, 3, 5, 7, 9, 11, 13, 15

Determine if 15 is a multiple of 3.

• Sometimes

• No

• Maybe

• Yes

Identify the first 5 multiples of 7.

• [7, 14, 21, 28, 35]

• 7, 14, 21, 28, 42

• 7, 14, 21, 27, 35

• 7, 14, 20, 28, 35

Explain the difference between prime and composite numbers.

• Prime numbers are always odd, while composite numbers are always even.

• Prime numbers have more factors than composite numbers.

• The difference between prime and composite numbers is that prime numbers have only two factors, while composite numbers have more than two factors.

• Composite numbers have only two factors.

How many factors does the number 50 have?

• 6

• 10

• 8

• 4

What is the sum of the first 4 prime numbers?

• 12

• 17

• 23

• 21

Are all even numbers composite? Why or why not?

• Yes

• No

• Only prime numbers

• Sometimes

Identify the prime numbers between 20 and 30.

• 21, 27

• 25

• 23, 29

• 23, 27