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Find the next line in the sequence

  1. Oct 20, 2004 #1
    Hello, as part of a standardized test practice booklet that I have been doing on my own, I was given a problem and told to find the next line in the sequence. I have attempted it several times, and asked many friends, but we can not seem to get it.
    It will probably turn out to be something terribly obvious,and once it is figured out i will feel incredibly lame, but I will go crazy if I do not find out! :blushing:
    The sequence is as follows:

    I've tried many things with it, but none of them have worked out. At first glance of course, you see the value increasing by 10, but once you see the fourth column, that obviously does not work.

    Any input would be appreciated.
    Thank you.

  2. jcsd
  3. Oct 20, 2004 #2
    there is one one (11)
    there are two ones (21)
    there is one two and one one (1211)

    and on...

    1113213211 (look at the previous number....there is one one, one three, two ones, three twos, and one one

    get it?

    what test is this for?!?! it sounds like a trick question

    btw, welcome to PF hailee
    Last edited: Oct 20, 2004
  4. Oct 20, 2004 #3

    It is from a booklet type thing that my teacher gave me, saying it would help me in standardized test preparations.. It has lots of problems similar to this, and I have been able to solve many, but a few of them I have difficulty with. But they always seem to have obvious enough answers, so maybe I'm simply not working hard enough or long enough on them. Or,I could be over working them and not seeing the obvious answers!

    So, going by your given pattern, the next sequence would be

    And thank you so much. I appreciate it.

  5. Oct 20, 2004 #4
    you almost got it

    as I posted above...
    1113213211 (look at the previous number....there is one one, one three, two ones, three twos, and one one)
  6. Oct 20, 2004 #5

    oh geez. i didn't see that you had posted what the next one would be. Once i thought I saw the pattern I started trying to find the next one. And I was wrong, hah. But I'm fairly sure that I get it now.
    So, for understandings sake,
    >31131211131221 ?

    I think?

  7. Oct 20, 2004 #6
    yes! thats correct
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