Lesson Worksheet: Common Factors Mathematics • 4th Grade

In this worksheet, we will practice finding the common factors of two or three whole numbers by listing their factors.

Q1:

Which number is a factor of 12 and a factor of 33?

Q2:

Which of the following numbers is not a common factor of 60 and 90?

  • A3
  • B15
  • C13
  • D10
  • E2

Q3:

Farida claims that any two numbers have the common factor 1. Is she right?

  • ANo
  • BYes

Q4:

Noah claims that zero is a factor of only one number, which is the zero itself. Is this true?

  • AYes
  • BNo

Q5:

Which of the following numbers have the common factors 1, 3, and 5?

  • A8, 15
  • B15, 25
  • C20, 30
  • D15, 20
  • E15, 30

Q6:

Are all factors of 9 also factors of 18?

  • ANo
  • BYes

Q7:

Find the common factors of the numbers 27 and 90.

  • A3, 9
  • B1, 2, 3, 6, 9, 18
  • C1, 3, 9
  • D1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 90

Q8:

True or False: There are no common factors between 17 and 59.

  • AFalse
  • BTrue

Q9:

Which of these pairs of numbers has a common factor of 2?

  • A24 and 28
  • B28 and 27
  • C24 and 21
  • D24 and 27
  • E21 and 27

Q10:

True of False: 5 is not a common factor of 24 and 36.

  • AFalse
  • BTrue

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