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Can You Complete These Number Sequences?

3, 2, 1... Go!

Posted on
  1. 1.

    1, 2, 4, 8
    Correct!
    Wrong!

    Each number in this sequence is the previous number, doubled.

  2. 2.

    3, 7, 11, 15
    Correct!
    Wrong!

    This sequence starts at 3, and each number goes up by 4.

  3. 3.

    1, 1, 2, 3, 5 
    Correct!
    Wrong!

    This is the Fibonacci sequence. Every number after the first two is the sum of the two preceding numbers.

  4. 4.

    20, 17, 14, 11
    Correct!
    Wrong!

    This sequence starts at 20 and reduces by 3 each time.

  5. 5.

    -3, -1, 1, 3
    Correct!
    Wrong!

    This sequence starts at -3 and you add 2 each time to get the next term.

  6. 6.

    1, 4, 9, 16, 25
    Correct!
    Wrong!

    This sequence is made up of square numbers.

  7. 7.

    81, 27, 9, 3
    Correct!
    Wrong!

    In this sequence you divide the preceding number by 3 to get the next term.

  8. 8.

    1, 8, 27, 64
    Correct!
    Wrong!

    This sequence is cube numbers.

  9. 9.

    5, 10, 20, 40
    Correct!
    Wrong!

    In this sequence you double the preceding term to get the next one.

  10. 10.

    2, 3, 5, 7, 11
    Correct!
    Wrong!

    This sequence is made up of prime numbers (numbers that are only divisible by 1 and themselves).

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

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

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