# Maths - "look and say" Number Sequences

The "look and say" sequence is an integer sequence.

The first integer is usually a single digit integer, it can be any positive integer.

Determine the next number in the sequence:

1
11
21
1211
111221
312211
?

### Comments for Maths - "look and say" Number Sequences

 Feb 23, 2011 Maths - “look and say” Number Sequences by: Staff ------------------------------------------ PART II 7th row: SEQUENCE UNKNOWN work backwards The sequence in the 6th (previous) row is known Sixth (previous) row: 312211 Therefore, the verbal description of the 7th row should be: Read as: “One 3”, “One 1”, “Two 2’s”, “Two 1’s” Therefore, the number sequence for the 7th row is: 13 11 22 21 The final answer to your question is: 1 11 21 1211 111221 312211 13112221 . . . For your information, there is an automatic way of calculating each row using a free on-line calculator. The calculator will also allow you to change the starting point (instead of using 1 for the first row, you can use 2, etc. Just click on the link below: http://www.btinternet.com/~se16/js/looknsay.htm Thanks for writing. Staff www.solving-math-problems.com