Another Think Out Of The Boxes(The Id-"1"-- )

What is the next number in the sequence

1 , 11 , 21 , 1211 , ? 1, 11, 21, 1211, \ldots?


The answer is 111221.

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3 solutions

The above sequence in known as Look And Say Sequence. Why this types of name for this sequence? It is the key point about this sequence. Just try think the sequence from a different view of your mind . You may get the answer.

For creating this sequence , follow the steps :

  1. Take any number you like.
  2. Pronounce the number correctly . As for the number 1 , It must be read as ‘one 1’ . Where “one” represents the total digits of that number.
  3. Now write the ‘one 1’ numerically . So we get the number 11.
  4. Next we can read 11 as ‘two 1’ . So the next number of this sequence is 21.
  5. Now we can read the number 21 as ‘one 2 one 1′ . So the next number of the sequence is 1211 . 6.By following the above rules , the next number should be : 111221.

You may Read This Article for knowing more about this.

Izeam Harris
Apr 12, 2018

9,19,1119,3119,132119

B D
Nov 18, 2018

In the Look and say Conway sequence you can start with any number from 1 to 9. To find the next term you must follow this rule:

1 - 1

one 1 - 11

two 1 - 21

one 2 one 1 - 1211

one 1 one 2 two 1 - 111221

. . .

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