Exploring Prime and Composite Numbers

What is a factor?

• A number that cannot be divided evenly by any other number

• A number that has exactly two factors

• A number that can only be divided by itself and one

• A number that divides another number without leaving a remainder

Which of the following is a prime number?

• 21

• 9

• 10

• 19

What makes a number composite?

• It is divisible by numbers other than 1 and itself

• It has exactly two factors

• It can only be divided by 1 and itself

• It is greater than 1 and has no other factors

Is 22 a prime or composite number?

• Both

• Prime

• Composite

• Neither

Which number is correctly identified as composite?

• 16

• 37

• 47

• 29

What category does 17 belong to?

• Prime

• Composite

• Neither

• Both

Is 51 a prime or composite number?

• Composite

• Prime

• Neither

• Both

Which of the following numbers is prime?

• 25

• 33

• 51

• 43

What factors make 25 a composite number?

• 3 and 9

• 2 and 12

• 5 and 5

• 1 and 25

Which number is identified as prime in the practice sorting?

• 33

• 51

• 37

• 27