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Which are factors of 30?

• 1

• 2

• 3

• 4

Which of the following is a factor of 12?

• 5

• 7

• 6

• 9

Which of the following is a factor of 40?

• 2

• 4

• 5

• 6

Which number is a factor of all numbers?

• 5
• 10
• 0
• 1

Check all the correct answers.

Which of the following numbers have 5 as a factor?

• 15

• 20

• 25

• 32

All even numbers have which number as a factor?

• 3
• 4
• 2
• 5

Is 21 prime or composite?

• prime, because is has 2 factors

• composite, because it has 2 factors

• composite, because it has 4 factors

• neither

What is a composite number?

• a number with ONLY TWO factors

• a number with LESS THAN TWO factors

• a number with MORE THAN TWO factors

• a number with ONLY ONE factor

What is a prime number?

• a number with ONLY two factors

• a number with LESS THAN two factors

• a number with ONLY one factor

• a number with MORE THAN two factors

Which list has ONLY prime numbers?

• 1, 2, 3

• 2, 3, 5

• 2, 3, 4

• 2, 4, 6