Thread: Sequence Puzzle

1
11
21
1211
111221
??????
????????

The sequence above is a number puzzle. It should be read left to right, top to bottom.

Complete the last two rows of numbers? Explain how you got them.

Hint: This puzzle could've been placed in the non-mathematical sub-forum as well.

Originally Posted by masters

1
11
21
1211
111221
??????
????????

The sequence above is a number puzzle. It should be read left to right, top to bottom.

Complete the last two rows of numbers? Explain how you got them.

Hint: This puzzle could've been placed in the non-mathematical sub-forum as well.

1
11
21
1211
111221
312211
13112221

The solution is to read the digits in the number... for example 1211 is made by 1 one,1 one and then 2 ones

Spoiler:

312211
13112221

there are 3 1's, 2 2's, 1 1's
then there are 1 3's, 1 1's, 2 2's, 2 1's

Can't fool YOU guys! Great job Moo and Isomorphism!!