Prime Factors

The only factors that prime numbers have are:

• 0 and 1
• 0 and itself
• 1 and itself
• 1

Tags

CCSS.4.OA.B.4

Which number is the only even prime number?

• 0
• 2
• 1
• 3

Tags

CCSS.4.OA.B.4

What is the prime factorization of 15?

• 3x3x3
• 2x2x5
• 15
• 3x5

Write 36 as the product of it's prime factors...

• 2 x 2 x 3 x 3

• 2 x 2 x 2 x 3

• 2² x 3²

• 2² x 3

Which is a prime factor of 60?

• 2

• 4

• 6

• 8

Tags

CCSS.4.OA.B.4

What is the prime factorisation of 17?

• 2 x 8.5

• 3 x 6

• 17

• None of the above

What is the prime factorisation of 125?

• 5 x 25

• 5 x 5 x 5

• Both the above

• None of the above

Which of the following are correct prime factorisations of 132? (Tick all that apply).

• 4 x 3 x 11

• 2 x 2 x 3 x 11

• 2 x 6 x 11

• 2 x 3 x 3 x 11

• 2² x 3 x 11

What is a prime number?

• A number with only 2 factors: 1 and the number itself

• A number with 2 or more factors

Tags

CCSS.4.OA.B.4

Which of the following is the prime factorization of 48?

• 2x2x2x2x3

• 2x2x3

• 6x8