Prime and Composite Numbers

Prime and Composite Numbers

by Candacy Lindie

​Factor Combinations

• ​ Factors are numbers that you use to multiply to get the required number. In the equation, 3 x 2 = 6, the factors of 6 are 3 and 2.

  Composite Numbers - Some numbers have more than 2 factor combinations like 9. The combinations to multiply to get 9 are 1 x 9 and 3 x 3. Numbers that have more than just the factor combination 1 and itself are called composite numbers.

• Prime Numbers - 2 is a prime number because the only factor combination it has is 1 x 2. Numbers that have only one combination of factors - 1 and itself - are called prime numbers.

Multiple Choice

What are factors?

• The top number in a fraction.
• The numbers multiplied together to make a product.
• The bottom number in a fraction.
• Angles smaller than 90 degrees.

Multiple Choice

How is a prime number different from a composite number?

• Prime numbers are smaller than composite numbers.
• Composite numbers are larger than prime numbers.
• All odd numbers are prime numbers.
• Prime numbers have only 2 factors, and composite numbers have more than 2 factors.

​​PRIME NUMBERS

A NUMBER WHICH HAS ONLY TWO FACTORS, (1 AND THE NUMBER ITSELF) IS A PRIME NUMBER

EG: 2,3,5,7,11,13........ARE SOME PRIME NUMBERS

Multiple Choice

Prime numbers have:

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

​​COMPOSITE NUMBERS

A NUMBER WHICH HAS MORE THAN TWO FACTORS ARE COMPOSITE NUMBERS

EG: 4,6,8,9,10,12,14.........ARE COMPOSITE NUMBERS

Multiple Choice

Composite numbers:

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

Multiple Choice

Find the prime number

• 10
• 9
• 7
• 4

Multiple Choice

Which number is composite?

• 11
  11
• 13
• 21
• 23

Multiple Choice

Which number listed below is a prime number?

• 1
• 37
• 63
• 33

Multiple Choice

Which number is NOT divisible 6?

• 35
• 42
• 18
• 72

Multiple Choice

Which of the following numbers shows all of the factors of 12?

• 1,2,3,4,6,12
• 1,2,3,4,6,8,12
• 1,2,4,6,12
• 2,4,6,8,10,12

Multiple Choice

Which list is only composite numbers?

• 1, 3, 4
• 2, 4, 6
• 4, 6, 8
• 5, 6, 8

Multiple Choice

Which list has only prime numbers?

• 2, 3, 4, 5
• 1, 5, 7, 9
• 2, 3, 5, 7
• 2, 4, 6, 8

Multiple Choice

Are all even numbers composite numbers?

• Yes
• No

Multiple Choice

Are all odd numbers prime numbers?

• Yes
• No

Multiple Choice

Are there any numbers that are neither prime nor composite?

• Yes
• No