What is the next number in the sequence? 1 11 21 1211 111221 312211

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28 May 2020 Sequence

What is the next number in the sequence? 1 11 21 1211 111221 312211

OPtion

1) 13122111
2) 13112121
3) 13112222
4) 13111221
5) 13112221
6) 13212221
7) 13222221
8) 13113221
9) 13132221
10) None of these

Solution

13112221. Each number describes the previous number. Starting with 1, the second line describes it 11 (one 1). Then the third line describes 11 as 21 (two 1's). Then the fourth line describes 21 as 1211 (one 2, one 1). This is the pattern.

Correct Option: 5 Best Solution (2)