Prime and Composite Numbers

What Are Composite & prime Numbers?

• A prime number is a whole number that only has two factors which are itself and one. A composite number has factors in addition to one and itself. The numbers 0 and 1 are neither prime nor composite. All even numbers are divisible by two and so all even numbers greater than two are composite numbers.
• Don't Know

Prime numbers have:

• Exactly 2 factors
• 2 pairs of factors
• More than 2 factors
• 1 factor

Composite numbers:

• Are always bigger than prime numbers
• Have more than 2 factors
• Have 2 pairs of factors
• Don't have factors

Find the prime number

• 10
• 9
• 7
• 4

which number is composite

• 11
  11
• 13
• 21
• 23

Which number is NOT a factor of 10?

• 1
• 2
• 3
• 5

True or False
2 is a COMPOSITE number.

• TRUE
• FALSE

Which number is NOT a factor of 18 ?

• 2
• 3
• 5
• 9

Which number listed below is a prime number?

• 1
• 37
• 63
• 33

Which of the following is a factor of 54?

• 4
• 7
• 5
• 9