Number pattern sequence
Level
1
What's the next number in this sequence?
The answer is 312211.
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1 solution
This is called the look and say sequence where each successive number in the sequence is formed by 'reading out' the digits of the preceding number.
For example, 1 is read as "one one" and so the next term is 11.
11 is read as "two ones" and so the next term is 21.
21 is read as "one two, one one" and so the next term is 1211.
111221 is read as "three ones, two twos, one one" so the next term is 312211 .