Next number in this sequence: 1, 11, 21, 1211, 111221, 312211, 13112221?

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What is the next number in this sequence:

1, 11, 21, 1211, 111221, 312211,  13112221, _________?

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    Best answer

    The next number in sequence is 1113213211.

    EXPLANATION-
    The sequence goes like
    You need to spell the no of digits.

    e.g. take the no 1,11,21
    Take 1. it spells as one 1 so we get the no 11,
    take 11 we spell it as two ones‘ and we get 21

    .so take the last given no in the sequence 13112221 so we spell it as one 1  one 3 two 1 three 2’s one 1.
    So
    the next no in sequence is 1113213211.

    SherlockHolmes Expert Answered on 11th September 2015.
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