1311221
The last number consists of one 3 followed by one 1 followed by two 2s followed by two 1s Stringing all these numbers together gives 13112221
111221
Any answer would work, but the most 'obvious' answer is 111221. To see why, try reading the numbers out loud one digit at a time.
It is 100000.
312211 13112221
223455423122343
331131211131221
1311221
1113213211
The last number consists of one 3 followed by one 1 followed by two 2s followed by two 1s Stringing all these numbers together gives 13112221
111221
Next in sequence is 13112221.This series describes each number that came before it:1 [One]11 [One One]21 [Two One(s)]1211 [One Two and One One(s)]111221 [One One, One Two, and Two One(s)]312211 [Three One(s), Two Two(s), and One One]The next number in the series is:13112221 [One Three, One One, Two Two(s), Two One(s)]
312 211 110 3-1=2 2-1=1 1-1=0
Any answer would work, but the most 'obvious' answer is 111221. To see why, try reading the numbers out loud one digit at a time.
2121
Did you mean (111 (1 lots of 1)21 (2 lots of 1)1211 (1 lot of 2, 1 lot of 1)111221 (1 lot of 1, 1 lot of 2, 2 lots of 1)312211 (3 lots of 1, 2 lots of 2, 1 lot of 1)13112221 (1 lots of 3, 1 lot of 1, 2 lots of 2, 2 lots of 1)1113213211 (1 lot of 1, 1 lot of 3, 2 lots of 1, 3 lots of 2, 1 lot of 1)31131211131221 (3 lots of 1, 1 lot of 3, 1 lot of 2, 1 lot of 1, 1 lot of 3, 1 lot of 2, 2 lots of 1)Each new number describes the previous number. (Answer in bold)