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Grade 5 - Mathematics
1.10 Prime and Composite Facts for Numbers 1 through 20

Prime Numbers :
  • The numbers larger than 1 and having exactly two factors.
  • 1 and the number itself are called prime numbers
  • Example: 2, 3, 19, 17........
Composite Numbers :
  • The numbers having more than two factors are called composite numbers.
  • Example: 4, 6, 112, 150 ..........

Directions: Review the following table and answer the questions. Also write atleast 10 examples of your own for prime and composite numbers.
Q 1: 7 is a _______ number.
even
prime
composite

Q 2: The only even prime number is ____.
Answer:

Q 3: How many even prime numbers are there?
3
1
2
many

Q 4: Which of the following numbers is neither prime nor composite?
2
3
1

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Question 6: This question is available to subscribers only!


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