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**ellmp****Member**- Registered: 2006-01-31
- Posts: 3

Can you complete this series of numbers? You'll know when that happens if you solve the problem correctly

1

11

21

1112

3112

211213

312213

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**Andrea****Member**- Registered: 2006-01-31
- Posts: 11

Uhmm... I think I've heard this one before. I don't remember if this is right, but it has something to do with speaking it out loud.

I'm going to guess..

212223?

Black holes are when God divided by zero.

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**Tigeree****Member**- Registered: 2005-11-19
- Posts: 13,847

no.....um.......er............ohhh 412224 it's wrong *crying*

People don't notice whether it's winter or summer when they're happy.

~ Anton Chekhov

Cheer up, emo kid.

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**ellmp****Member**- Registered: 2006-01-31
- Posts: 3

Cmon guys I need some help here. What is the pattern?

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**irspow****Member**- Registered: 2005-11-24
- Posts: 455

http://www.nerur.com/puzzles/

Whooops! That site doesn't have the answer either, but they pose the same problem.

*Last edited by irspow (2006-02-02 10:06:33)*

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**mathsyperson****Moderator**- Registered: 2005-06-22
- Posts: 4,900

I agree with Andrea.

The first number in the sequence has one 1. That's 11.

The next has two 1's. That's 21.

Next, we have one 1 and one 2. 1112.

Time time we have three 1's and one 2. 3112.

And so on...

Why did the vector cross the road?

It wanted to be normal.

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**ellmp****Member**- Registered: 2006-01-31
- Posts: 3

Thank you guys. It finally makes sense

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**irspow****Member**- Registered: 2005-11-24
- Posts: 455

So the series ends with 21322314? You guys are good! I would have never have seen that relationship. A math problem that does not use math...hmm.

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**mathsyperson****Moderator**- Registered: 2005-06-22
- Posts: 4,900

That's what I get. From where ellmp left off, you just need 5 more iterations and then it starts repeating itself.

Why did the vector cross the road?

It wanted to be normal.

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,523

Here's another one:

2,3,10,12,13,20,21,?

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 86,666

Hi;

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

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