Find the next number in the sequence

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987,  191817,  111911181117,  311931183117,  132119132117, 11131221191113122117,  ???????????????

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    Best answer

    Answer – 311311222119311311222117

    Explanation-
    987, 191817, 111911181117, 311931183117, 132119132117, 11131221191113122117 …
    This looks a little scary. The sequence seem to grow at an alarming rate.

    The logical relation is quite easy
    –  Logic – Count the number of each type of digit, out loud.
    Take 1st number – 987
    In above, (1 times 9)(1 times 8)(1 times 7) -> 191817
    In above, (1 times 1)(1 times 9)(1 times 1)(1 times 8)(1 times 1)(1 times 7) -> 111911181117
    and so on…..


    So, last given number is  – 11131221191113122117
    Hence, Next would be,
    (3 times 1)(1 times 3)(1 times 1)(2 times 2)(2 times 1)(1 times 9)( 3 times 1)(1 times 3)(1 times 1)(2 times 2)(2 times 1)(1 times 7) => 311311222119311311222117

    ronret45 Expert Answered on 25th February 2016.
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