# "Prime Numbers Worksheet With Answers - 4-14 Challenge"

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Name
Name
Date
Date
4–1
4
4–1
4–1
4–1
4 4 4
Name
Name
Name
Name
Name
Name
Date
Date
Date
Date
Date
Date
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
A number whose only factors are 1 and itself is called
⫻ ⫻
⫽ ⫽
1
2
2
a
prime number
prime number
. The number 2 is a prime number because
⫻ ⫻ ⫻ ⫻ ⫻ ⫻
⫽ ⫽ ⫽ ⫽ ⫽ ⫽
A number whose only factors are 1 and itself is called
A number whose only factors are 1 and itself is called
A number whose only factors are 1 and itself is called
the only factors of 2 are 1 and 2.
1 1 1
2 2 2
2 2 2
prime number
prime number
prime number
prime number
prime number
prime number
a a a
. The number 2 is a prime number because
. The number 2 is a prime number because
. The number 2 is a prime number because
⫻ ⫻
⫽ ⫽
1
4
4
The number 4 is not a prime number. The number 4 has three
the only factors of 2 are 1 and 2.
the only factors of 2 are 1 and 2.
the only factors of 2 are 1 and 2.
⫻ ⫻ ⫻ ⫻ ⫻ ⫻
⫻ ⫻
⫽ ⫽ ⫽ ⫽ ⫽ ⫽
⫽ ⫽
2
2
4
factors, 1, 2, and 4.
1 1 1
4 4 4
4 4 4
⫻ ⫻ ⫻ ⫻ ⫻ ⫻
⫽ ⫽ ⫽ ⫽ ⫽ ⫽
The number 4 is not a prime number. The number 4 has three
The number 4 is not a prime number. The number 4 has three
The number 4 is not a prime number. The number 4 has three
2 2 2
2 2 2
4 4 4
factors, 1, 2, and 4.
factors, 1, 2, and 4.
factors, 1, 2, and 4.
Think about the definition of prime number
Think about the definition of prime number
s and different wa
s and different wa
ys to make
ys to make
pr pr
oducts to solve the follo
oducts to solve the follo
wing pr
wing pr
oblems.
oblems.
Think about the definition of prime number
Think about the definition of prime number
Think about the definition of prime number
Think about the definition of prime number
Think about the definition of prime number
Think about the definition of prime number
s and different wa
s and different wa
s and different wa
s and different wa
s and different wa
s and different wa
ys to make
ys to make
ys to make
ys to make
ys to make
ys to make
pr pr pr pr pr pr
oducts to solve the follo
oducts to solve the follo
oducts to solve the follo
oducts to solve the follo
oducts to solve the follo
oducts to solve the follo
wing pr
wing pr
wing pr
wing pr
wing pr
wing pr
oblems.
oblems.
oblems.
oblems.
oblems.
oblems.
List the numbers from 3 through 10. Which numbers are prime? Which are not
1. 1.
1. 1. 1. 1. 1. 1.
prime? How do you know?
List the numbers from 3 through 10. Which numbers are prime? Which are not
List the numbers from 3 through 10. Which numbers are prime? Which are not
List the numbers from 3 through 10. Which numbers are prime? Which are not
prime? How do you know?
prime? How do you know?
prime? How do you know?
Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.
2. 2.
2. 2. 2. 2. 2. 2.
Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.
Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.
Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.
Look at the numbers in problem 2. What do these numbers have in common?
3. 3.
3. 3. 3. 3. 3. 3.
Look at the numbers in problem 2. What do these numbers have in common?
Look at the numbers in problem 2. What do these numbers have in common?
Look at the numbers in problem 2. What do these numbers have in common?
The number 2 is even and it is a prime number. Are there other even numbers
4. 4.
4. 4. 4. 4. 4. 4.
that are prime numbers? Explain.
The number 2 is even and it is a prime number. Are there other even numbers
The number 2 is even and it is a prime number. Are there other even numbers
The number 2 is even and it is a prime number. Are there other even numbers
that are prime numbers? Explain.
that are prime numbers? Explain.
that are prime numbers? Explain.
Explore It
Explore It
A number that is not a prime number is called a composite
5. 5.
5. 5. 5. 5. 5. 5.
number. On a separate sheet of paper, list
the numbers from 2 through 18. Tell
Explore It
Explore It
Explore It
Explore It
Explore It
Explore It
A number that is not a prime number is called a composite
A number that is not a prime number is called a composite
A number that is not a prime number is called a composite
if each number is prime or composite.
Write two pairs of factors for each
number. On a separate sheet of paper, list
number. On a separate sheet of paper, list
number. On a separate sheet of paper, list
the numbers from 2 through 18. Tell
the numbers from 2 through 18. Tell
the numbers from 2 through 18. Tell
composite number on the list.
if each number is prime or composite.
if each number is prime or composite.
if each number is prime or composite.
Write two pairs of factors for each
Write two pairs of factors for each
Write two pairs of factors for each
composite number on the list.
composite number on the list.
composite number on the list.
Name
Name
Date
Date
4–1
4
4–1
4–1
4–1
4 4 4
Name
Name
Name
Name
Name
Name
Date
Date
Date
Date
Date
Date
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
A number whose only factors are 1 and itself is called
⫻ ⫻
⫽ ⫽
1
2
2
a
prime number
prime number
. The number 2 is a prime number because
⫻ ⫻ ⫻ ⫻ ⫻ ⫻
⫽ ⫽ ⫽ ⫽ ⫽ ⫽
A number whose only factors are 1 and itself is called
A number whose only factors are 1 and itself is called
A number whose only factors are 1 and itself is called
the only factors of 2 are 1 and 2.
1 1 1
2 2 2
2 2 2
prime number
prime number
prime number
prime number
prime number
prime number
a a a
. The number 2 is a prime number because
. The number 2 is a prime number because
. The number 2 is a prime number because
⫻ ⫻
⫽ ⫽
1
4
4
The number 4 is not a prime number. The number 4 has three
the only factors of 2 are 1 and 2.
the only factors of 2 are 1 and 2.
the only factors of 2 are 1 and 2.
⫻ ⫻ ⫻ ⫻ ⫻ ⫻
⫻ ⫻
⫽ ⫽ ⫽ ⫽ ⫽ ⫽
⫽ ⫽
2
2
4
factors, 1, 2, and 4.
1 1 1
4 4 4
4 4 4
⫻ ⫻ ⫻ ⫻ ⫻ ⫻
⫽ ⫽ ⫽ ⫽ ⫽ ⫽
The number 4 is not a prime number. The number 4 has three
The number 4 is not a prime number. The number 4 has three
The number 4 is not a prime number. The number 4 has three
2 2 2
2 2 2
4 4 4
factors, 1, 2, and 4.
factors, 1, 2, and 4.
factors, 1, 2, and 4.
Think about the definition of prime number
Think about the definition of prime number
s and different wa
s and different wa
ys to make
ys to make
pr pr
oducts to solve the follo
oducts to solve the follo
wing pr
wing pr
oblems.
oblems.
Think about the definition of prime number
Think about the definition of prime number
Think about the definition of prime number
Think about the definition of prime number
Think about the definition of prime number
Think about the definition of prime number
s and different wa
s and different wa
s and different wa
s and different wa
s and different wa
s and different wa
ys to make
ys to make
ys to make
ys to make
ys to make
ys to make
pr pr pr pr pr pr
oducts to solve the follo
oducts to solve the follo
oducts to solve the follo
oducts to solve the follo
oducts to solve the follo
oducts to solve the follo
wing pr
wing pr
wing pr
wing pr
wing pr
wing pr
oblems.
oblems.
oblems.
oblems.
oblems.
oblems.
List the numbers from 3 through 10. Which numbers are prime? Which are not
1. 1.
1. 1. 1. 1. 1. 1.
prime? How do you know?
List the numbers from 3 through 10. Which numbers are prime? Which are not
List the numbers from 3 through 10. Which numbers are prime? Which are not
List the numbers from 3 through 10. Which numbers are prime? Which are not
prime? How do you know?
prime? How do you know?
prime? How do you know?
Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.
2. 2.
2. 2. 2. 2. 2. 2.
Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.
Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.
Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.
Look at the numbers in problem 2. What do these numbers have in common?
3. 3.
3. 3. 3. 3. 3. 3.
Look at the numbers in problem 2. What do these numbers have in common?
Look at the numbers in problem 2. What do these numbers have in common?
Look at the numbers in problem 2. What do these numbers have in common?
The number 2 is even and it is a prime number. Are there other even numbers
4. 4.
4. 4. 4. 4. 4. 4.
that are prime numbers? Explain.
The number 2 is even and it is a prime number. Are there other even numbers
The number 2 is even and it is a prime number. Are there other even numbers
The number 2 is even and it is a prime number. Are there other even numbers
that are prime numbers? Explain.
that are prime numbers? Explain.
that are prime numbers? Explain.
Explore It
Explore It
A number that is not a prime number is called a composite
5. 5.
5. 5. 5. 5. 5. 5.
number. On a separate sheet of paper, list
the numbers from 2 through 18. Tell
Explore It
Explore It
Explore It
Explore It
Explore It
Explore It
A number that is not a prime number is called a composite
A number that is not a prime number is called a composite
A number that is not a prime number is called a composite
if each number is prime or composite.
Write two pairs of factors for each
number. On a separate sheet of paper, list
number. On a separate sheet of paper, list
number. On a separate sheet of paper, list
the numbers from 2 through 18. Tell
the numbers from 2 through 18. Tell
the numbers from 2 through 18. Tell
composite number on the list.
if each number is prime or composite.
if each number is prime or composite.
if each number is prime or composite.
Write two pairs of factors for each
Write two pairs of factors for each
Write two pairs of factors for each
composite number on the list.
composite number on the list.
composite number on the list.
Name
Name
Date
Date
4–1
4
4–1
4–1
4–1
4 4 4
Name
Name
Name
Name
Name
Name
Date
Date
Date
Date
Date
Date
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
Prime Numbers
A number whose only factors are 1 and itself is called
⫻ ⫻
⫽ ⫽
1
2
2
a
prime number
prime number
. The number 2 is a prime number because
⫻ ⫻ ⫻ ⫻ ⫻ ⫻
⫽ ⫽ ⫽ ⫽ ⫽ ⫽
A number whose only factors are 1 and itself is called
A number whose only factors are 1 and itself is called
A number whose only factors are 1 and itself is called
the only factors of 2 are 1 and 2.
1 1 1
2 2 2
2 2 2
prime number
prime number
prime number
prime number
prime number
prime number
a a a
. The number 2 is a prime number because
. The number 2 is a prime number because
. The number 2 is a prime number because
⫻ ⫻
⫽ ⫽
1
4
4
The number 4 is not a prime number. The number 4 has three
the only factors of 2 are 1 and 2.
the only factors of 2 are 1 and 2.
the only factors of 2 are 1 and 2.
⫻ ⫻ ⫻ ⫻ ⫻ ⫻
⫻ ⫻
⫽ ⫽ ⫽ ⫽ ⫽ ⫽
⫽ ⫽
2
2
4
factors, 1, 2, and 4.
1 1 1
4 4 4
4 4 4
⫻ ⫻ ⫻ ⫻ ⫻ ⫻
⫽ ⫽ ⫽ ⫽ ⫽ ⫽
The number 4 is not a prime number. The number 4 has three
The number 4 is not a prime number. The number 4 has three
The number 4 is not a prime number. The number 4 has three
2 2 2
2 2 2
4 4 4
factors, 1, 2, and 4.
factors, 1, 2, and 4.
factors, 1, 2, and 4.
Think about the definition of prime number
Think about the definition of prime number
s and different wa
s and different wa
ys to make
ys to make
pr pr
oducts to solve the follo
oducts to solve the follo
wing pr
wing pr
oblems.
oblems.
Think about the definition of prime number
Think about the definition of prime number
Think about the definition of prime number
Think about the definition of prime number
Think about the definition of prime number
Think about the definition of prime number
s and different wa
s and different wa
s and different wa
s and different wa
s and different wa
s and different wa
ys to make
ys to make
ys to make
ys to make
ys to make
ys to make
pr pr pr pr pr pr
oducts to solve the follo
oducts to solve the follo
oducts to solve the follo
oducts to solve the follo
oducts to solve the follo
oducts to solve the follo
wing pr
wing pr
wing pr
wing pr
wing pr
wing pr
oblems.
oblems.
oblems.
oblems.
oblems.
oblems.
List the numbers from 3 through 10. Which numbers are prime? Which are not
1. 1.
1. 1. 1. 1. 1. 1.
prime? How do you know?
List the numbers from 3 through 10. Which numbers are prime? Which are not
List the numbers from 3 through 10. Which numbers are prime? Which are not
List the numbers from 3 through 10. Which numbers are prime? Which are not
3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,
3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,
prime? How do you know?
prime? How do you know?
prime? How do you know?
and 7 only have the factors 1 and 3, 5, or 7.
and 7 only have the factors 1 and 3, 5, or 7.
3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,
3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,
3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,
3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,
3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,
3, 5, and 7 are prime; 4, 6, 8, 9, and 10 are not prime. 3, 5,
Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.
and 7 only have the factors 1 and 3, 5, or 7.
and 7 only have the factors 1 and 3, 5, or 7.
and 7 only have the factors 1 and 3, 5, or 7.
and 7 only have the factors 1 and 3, 5, or 7.
2. 2.
and 7 only have the factors 1 and 3, 5, or 7.
and 7 only have the factors 1 and 3, 5, or 7.
2. 2. 2. 2. 2. 2.
Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.
Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.
Are any of the following numbers prime: 6, 8, 10, 12, 14, 16, 18? Explain.
No, because the number 2 is also a factor of each of
No, because the number 2 is also a factor of each of
these numbers.
these numbers.
No, because the number 2 is also a factor of each of
No, because the number 2 is also a factor of each of
No, because the number 2 is also a factor of each of
No, because the number 2 is also a factor of each of
No, because the number 2 is also a factor of each of
No, because the number 2 is also a factor of each of
Look at the numbers in problem 2. What do these numbers have in common?
3. 3.
these numbers.
these numbers.
these numbers.
these numbers.
these numbers.
these numbers.
3. 3. 3. 3. 3. 3.
They are all even numbers.
They are all even numbers.
Look at the numbers in problem 2. What do these numbers have in common?
Look at the numbers in problem 2. What do these numbers have in common?
Look at the numbers in problem 2. What do these numbers have in common?
They are all even numbers.
They are all even numbers.
They are all even numbers.
They are all even numbers.
The number 2 is even and it is a prime number. Are there other even numbers
They are all even numbers.
They are all even numbers.
4. 4.
4. 4. 4. 4. 4. 4.
that are prime numbers? Explain.
The number 2 is even and it is a prime number. Are there other even numbers
The number 2 is even and it is a prime number. Are there other even numbers
The number 2 is even and it is a prime number. Are there other even numbers
No, all other even numbers have the number 2 as a factor.
No, all other even numbers have the number 2 as a factor.
that are prime numbers? Explain.
that are prime numbers? Explain.
that are prime numbers? Explain.
Explore It
Explore It
A number that is not a prime number is called a composite
5. 5.
No, all other even numbers have the number 2 as a factor.
No, all other even numbers have the number 2 as a factor.
No, all other even numbers have the number 2 as a factor.
No, all other even numbers have the number 2 as a factor.
No, all other even numbers have the number 2 as a factor.
No, all other even numbers have the number 2 as a factor.
5. 5. 5. 5. 5. 5.
number. On a separate sheet of paper, list
the numbers from 2 through 18. Tell
Explore It
Explore It
Explore It
Explore It
Explore It
Explore It
A number that is not a prime number is called a composite
A number that is not a prime number is called a composite
A number that is not a prime number is called a composite
if each number is prime or composite.
Write two pairs of factors for each
number. On a separate sheet of paper, list
number. On a separate sheet of paper, list
number. On a separate sheet of paper, list
the numbers from 2 through 18. Tell
the numbers from 2 through 18. Tell
the numbers from 2 through 18. Tell
composite number on the list.
if each number is prime or composite.
if each number is prime or composite.
if each number is prime or composite.
Write two pairs of factors for each
Write two pairs of factors for each
Write two pairs of factors for each
Check students’ work.
Check students’ work.
composite number on the list.
composite number on the list.
composite number on the list.
Prime numbers: 2, 3, 5, 7, 11, 13, 17
Prime numbers: 2, 3, 5, 7, 11, 13, 17
Check students’ work.
Check students’ work.
Check students’ work.
Check students’ work.
Check students’ work.
Check students’ work.
Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16
Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16
Prime numbers: 2, 3, 5, 7, 11, 13, 17
Prime numbers: 2, 3, 5, 7, 11, 13, 17
Prime numbers: 2, 3, 5, 7, 11, 13, 17
Prime numbers: 2, 3, 5, 7, 11, 13, 17
Prime numbers: 2, 3, 5, 7, 11, 13, 17
Prime numbers: 2, 3, 5, 7, 11, 13, 17
Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16
Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16
Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16
Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16
Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16
Composite numbers: 4, 6, 8, 9, 10, 12, 14, 15, 16
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