1
11
21
1211
111221
312211
what is the next row?
2006-09-13 13:00:23 · 2 answers · asked by ddandmm 2 in Science & Mathematics ➔ Mathematics
The sequence is:
1
11
21
1211
111221
312211
13112221 <---
1113213211
31131211131221
13211311123113112211
11131221133112132113212221
3113112221232112111312211312113211
etc.
Each row describes the row before it:
1
11 = the number before is made up of one '1' (11)
21 = the number before is made up of two '1's (21)
1211 = the number before is made up of one '2' and one '1' (1211)
111221 = the number before is one '1', one '2' and two '1's. (111221)
312211 = the number before: three '1's, two '2's and one '1'. (312211)
So the next number is:
one '3', one '1', two '2's, two '1's:
13112221
2006-09-13 13:01:37 · answer #1 · answered by Puzzling 7 · 2⤊ 0⤋
Why would you ask such a question?
2006-09-13 13:03:28 · answer #2 · answered by j.tech_77 3 · 0⤊ 1⤋