Guess the next number in the series 1, 11, 21, 1211, 111221, ...

Answer 1

1 = one 1 = next number is 11
11 = two 1's = next number is 21
21 = one 2, one 1 = next number is 1211
1211 = one 1 one 2 two 1 = next number is 111221
111221 = three 1 two 2 one 1 = next number is 312211

Answer 2

312211

this is the view and solve problem..here 1 appears 3 times 2 has appear 2 times and 1 appears 1 time