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**studymaths****Member**- Registered: 2010-04-11
- Posts: 32

So I was clearing out my classroom yesterday and came across a cryptic number puzzle. Unfortunately I couldn't find the solution and it's been so long I can't remember it. Even google couldn't help me!

The puzzle is:

**1, 13, 16, 61, ? , 217**

Find the missing number.

Can anyone help, it's driving me mad!

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,681

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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**studymaths****Member**- Registered: 2010-04-11
- Posts: 32

Thanks, I can stop tearing my hair out now. Maybe I'd have seen it if i'd bothered to *write* down the differences rather than working them out in my head.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,681

Hi studymaths;

Keeping good, neat notes has been the hardest thing. Just mastering that will make your students successful.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,015

I wanted to ask you about that. Where do you keep your notes? It seems that you have in there everything that you have ever worked on on this forum.

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

The knowledge of some things as a function of age is a delta function.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,681

I gloss in books.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,015

Gloss?

Have you posted the problem yet?

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

The knowledge of some things as a function of age is a delta function.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,681

Glossing is an old term.

Why are you not sleeping yet?

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,015

I am used to staying up late now.

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

The knowledge of some things as a function of age is a delta function.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,681

I am used to staying up late now.

Oh boy!

I haven't got a problem yet to post.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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**anonimnystefy****Real Member**- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,015

But you said you were gonna post one.

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

The knowledge of some things as a function of age is a delta function.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,681

They do not come out of thin air. I have to find one or create it. What type of problem is this?

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**

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