Exploring Divisibility and Prime Numbers

Which of the following numbers is not a factor of ten?

• 5

• 1

• 2

• 3

Tags

CCSS.4.OA.B.4

What is the largest factor of twenty?

• 10

• 20

• 5

• 4

Tags

CCSS.4.OA.B.4

Which of the following is a prime number?

• 4

• 9

• 6

• 7

Tags

CCSS.4.OA.B.4

Why can't even numbers (except two) be prime numbers?

• They are all divisible by two

• They are all odd

• They are all greater than ten

• They are all less than ten

Tags

CCSS.4.OA.B.4

Which of the following numbers is not a prime number?

• 11

• 13

• 15

• 17

Tags

CCSS.4.OA.B.4

What is a notable property of prime numbers?

• They are infinite

• They are all even

• They are all less than 100

• They are finite

Tags

CCSS.4.OA.B.4

What is the largest prime number discovered so far known for?

• Being less than 100

• Having millions of digits

• Being divisible by three

• Being an even number

Tags

CCSS.4.OA.B.4

What is the prime factorization of twenty?

• 2 x 2 x 5

• 4 x 5

• 10 x 2

• 5 x 4

What is the prime factorization of thirty-six?

• 12 x 3

• 9 x 4

• 3 x 3 x 2 x 2

• 6 x 6

What does the fundamental theorem of arithmetic state?

• Prime numbers are all even

• Prime numbers are finite

• Every number has a unique set of prime factors

• Every number has multiple sets of prime factors