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Can You Remember What On Earth Surds Are?

Were you paying attention in GCSE Maths?

Posted on

If you don't remember them from GCSE Maths, surds are basically just irrational numbers expressed as a square root.

So √3 is a surd, but √4 is not because it can be further simplified to 2.

In this quiz you just have to pick which answer shows the surd in its simplest form. Ready? Let's go.

  1. √12
    Correct
    Incorrect
    2√3
    Correct
    Incorrect
    4√3
  2. √18
    Correct
    Incorrect
    2√2
    Correct
    Incorrect
    3√2
  3. √32
    Correct
    Incorrect
    4√2
    Correct
    Incorrect
    8√2
  4. √72
    Correct
    Incorrect
    6√2
    Correct
    Incorrect
    8√2
  5. 5√12
    Correct
    Incorrect
    8√3
    Correct
    Incorrect
    10√3
  6. 5√18
    Correct
    Incorrect
    10√2
    Correct
    Incorrect
    15√2
  7. √8 x √4
    Correct
    Incorrect
    2√2
    Correct
    Incorrect
    4√2
  8. √18 / √9
    Correct
    Incorrect
    √2
    Correct
    Incorrect
    √3
  9. √48 – √12
    Correct
    Incorrect
    2√3
    Correct
    Incorrect
    √2
  10. (√7)²
    Correct
    Incorrect
    7
    Correct
    Incorrect
    √7

Kelly Oakes is science editor for BuzzFeed and is based in London.

Contact Kelly Oakes at kelly.oakes@buzzfeed.com.

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