Greatest Common Divisor. Do you know how to calculate it? [QUIZ]

  • Question of

    Let’s start! Find the gcd of 20 and 80:

    • 20
    • 80
    • 10
  • Question of

    All right! and the gcd of 33, 77 and 121?

    • 11
    • 12
    • 20
  • Question of

    No need to make many counts, what is the gcd of 21 and 28?

    • 7
    • 6
    • 5
  • Question of

    How you doing? Now the gcd of 15 and 30

    • 30
    • 15
    • 5
  • Question of

    Now! gcd of 30, 42 and 54

    • 6
    • 30
    • 8
  • Question of

    What is the gcd of 20 and 16?

    • 2
    • 4
    • 8
  • Question of

    18 and 24?

    • 6
    • 18
    • 24
  • Question of

    This one surely will be too easy for you: gcd of 3, 6, 9

    • 9
    • 6
    • 3
  • Question of

    What if we make it a little harder? 32, 48, 64 and 80

    • 20
    • 16
    • 14
  • Question of

    What is the gcd of 15, 20, 30 and 60?

    • 5
    • 10
    • 15
  • Question of

    16, 24 and 40 have as gcd:

    • 8
    • 2
    • 4
  • Question of

    gcd of 7, 14 and 21

    • 21
    • 14
    • 7
  • Question of

    gcd of 20, 28, 36 and 40

    • 2
    • 4
    • 8
  • Question of

    gcd of 144 and 520.

    • 2
    • 4
    • 8
  • Question of

    Last! What is the gcd of 28, 42, 56 and 70?

    • 14
    • 16
    • 12

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Written by Tamara Dominas

My name is Tamara. I define myself as a bookworm and that's where I spend most of my time. I'm a chemist, with a developing passion for languages. I speak three languages and I'm already going for the fourth. I currently live in Rome, Italy, and I declare myself profoundly in love with this city. You can write to me: send me an email. If you want to know more about me, read full profile.

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