Question

...Find the next number in series...

1 , 11 , 21 , 1211 , 111211 , 311221

...Justify the answer with reasoning...​

Answer 1

The explanation: each successive number is formed by looking at the preceding number and reading out the digits, grouping like digits together and saying the number of identical digits followed by the digit.

For example

First member-> 1 -> "1 one"

Second member-> 11 -> "2 ones"

Third member-> 21 -> "1 two, 1 one"

Fourth member -> 1211 -> "1ones, 1 two, 2 ones"

Fifth member-> 111211 -> "3 ones, 1 two, 2 ones" .

Sixth member-> 311221 -> "1 three, 2one's 2 twos, 1 ones"

Hope u understand it .