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GCF and LCM

Quiz by HEATHER BRLETIC-SHIPLEY

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18 questions
Show answers
  • Q1
    What is the LCM of 4 and 6?
    18
    12
    24
    6
    30s
  • Q2
    What is the GCF of 18 and 24?
    3
    12
    6
    9
    30s
  • Q3
    What is the LCM of 5 and 15?
    15
    45
    30
    5
    30s
  • Q4
    What is the GCF of 16 and 20?
    6
    2
    8
    4
    30s
  • Q5
    What is the LCM of 7 and 3?
    9
    21
    35
    14
    30s
  • Q6
    What is the GCF of 28 and 36?
    8
    6
    4
    2
    30s
  • Q7
    What is the LCM of 8 and 12?
    32
    16
    24
    48
    30s
  • Q8
    What is the GCF of 45 and 75?
    9
    25
    15
    5
    30s
  • Q9
    What is the LCM of 9 and 12?
    18
    48
    36
    27
    30s
  • Q10
    What is the GCF of 30 and 45?
    15
    20
    10
    5
    30s
  • Q11
    What is one method to find the GCF of two numbers?
    Using the sum of the two numbers.
    Multiplying the numbers together.
    Finding the average of the numbers.
    Using the prime factorization of each number.
    30s
  • Q12
    Why is it useful to know the GCF in fraction problems?
    It helps in simplifying fractions to the lowest terms.
    It allows you to find the least common multiple.
    It helps convert fractions to decimals.
    It makes adding fractions easier.
    30s
  • Q13
    What is a common way to find the GCF of two numbers?
    Listing the factors of each number.
    Multiplying the two numbers together.
    Adding the two numbers together.
    Subtracting the smaller number from the larger number.
    30s
  • Q14
    When might you need to use GCF in math class?
    When finding the area of a rectangle.
    When simplifying fractions.
    When multiplying whole numbers.
    When adding decimals.
    30s
  • Q15
    Why do we use LCM when adding or subtracting fractions?
    To convert them into whole numbers
    To simplify the fractions
    To find a common denominator
    To multiply the fractions
    30s

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