placeholder image to represent content

Greatest Common Factor

Quiz by Carolyn Kay

Feel free to use or edit a copy

includes Teacher and Student dashboards

Measure skills
from any curriculum

Tag the questions with any skills you have. Your dashboard will track each student's mastery of each skill.

With a free account, teachers can
  • edit the questions
  • save a copy for later
  • start a class game
  • automatically assign follow-up activities based on students’ scores
  • assign as homework
  • share a link with colleagues
  • print as a bubble sheet

Our brand new solo games combine with your quiz, on the same screen

Correct quiz answers unlock more play!

New Quizalize solo game modes
20 questions
Show answers
  • Q1
    The factors of 18 and 27 are 1, 2, 3, 6, 9, 18 and 1, 3, 9, 27. This means the greatest common factor of 18 and 27 is...
    54
    1
    3
    9
    45s
  • Q2
    If two numbers are consecutive, then their GCF will be 1 (so for example the GCF of 6 and 7 is 1).
    true
    false
    True or False
    45s
  • Q3
    What is the greatest common factor (GCF) of 10 and 15?
    5
    1
    2
    30
    45s
  • Q4
    What is the GCF of 3 and 4?
    12
    3
    1
    4
    45s
  • Q5
    What is the GCF of 4 and 5?
    5
    4
    20
    1
    45s
  • Q6
    What is the GCF of 14 and 28?
    7
    2
    14
    4
    45s
  • Q7
    If one number is a multiple of another, then their GCF will be the same as the smaller number (so the GCF of 20 and 60 would be 20).
    true
    false
    True or False
    45s
  • Q8
    What is the greatest common factor of 40 and 24?
    6
    5
    8
    2
    45s
  • Q9
    What is the GCF of 6 and 20?
    2
    45s
  • Q10
    The GCF of 5 and 15 is...
    1
    75
    15
    5
    45s
  • Q11
    The GCF of 12 and 14 is...
    2
    45s
  • Q12
    The GCF of two numbers is always one of those numbers.
    false
    true
    True or False
    45s
  • Q13
    The GCF of 15 and 25 is...
    15
    5
    1
    25
    45s
  • Q14
    The GCF of two prime numbers is always 1.
    False
    boolean:True
    45s
  • Q15
    What is the GCF of 10 and 20?
    20
    200
    1
    10
    45s

Teachers give this quiz to your class