Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**roniman****Member**- Registered: 2013-11-24
- Posts: 22

Hi everyone!

Very excited to see a forum full of people who love math.

So does every here make math worksheets on Excel for fun too?!?!

No?....oh....well, I don't do that either.../looks around

I tutor math from pre-algebra to AP calculus BC. I enjoy using puzzles/games to enhance my lesson plans. I am currently a Rubiks Cube ambassador.

I could go on and on about how much I love math and teaching. Hope to meet more people on here!

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,859

hi roniman

Welcome to the forum.

I am currently a Rubiks Cube ambassador.

?? So what does that involve? I wasn't aware they had an embassy?

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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**roniman****Member**- Registered: 2013-11-24
- Posts: 22

bob bundy wrote:

hi roniman

Welcome to the forum.

I am currently a Rubiks Cube ambassador.

?? So what does that involve? I wasn't aware they had an embassy?

Bob

does online embassy count?

apparently i can't post links yet, but youcandothecubedotcom

it involves me getting more students/teachers to learn the rubiks cube.

Just out of curiosity, how many cubers do we haev on this forum?

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,859

That's a great site, thanks.

You'll get full posting rights when you've been a member for a while.

Back in 1980, (Yes, I'm that old!), my school organised an inter-school cube competition. Cube meisters had dismantled, filed and powdered their cubes for maximum speed and the winner did a cube in 71 secs. One difficulty arises if you try to do this: the cube is likely to explode into separate pieces. That's not so bad if you're on your own, but if it happens in a school hall, lots of times, then there's a real problem getting everybody's cube back together.

Have you come across Singmaster's book http://en.wikipedia.org/wiki/David_Singmaster

Just out of curiosity, how many cubers do we have on this forum?

I don't know. If you do a search, you'll find at least 8, but I expect the true number is much greater. A bit like the inverse of god's algorithm; no one knows if 7 moves is always possible.

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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Welcome to the forum;

I had been asking my grandpa for a cube for a long time.

So does every here make math worksheets on Excel for fun too?!?!

Atleast one of them does. The rest use Mathematica.

bob wrote:

I don't know. If you do a search, you'll find at least 8, but I expect the true number is much greater. A bit like the inverse of god's algorithm; no one knows if 7 moves is always possible.

But how is he going to do the search?

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'

'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'

'You have made another human being happy. There is no greater accomplishment.' -bobbym

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,859

But how is he going to do the search?

He clicks on 'search' and enters the term 'rubik'.

It's hard to mention RC in a post without using that word.

Of course, this will only give a lower bound, as some cubists may be closet cubists.

Bob

ps. tell your grandpa that it is good for mathematical development

*Last edited by bob bundy (2013-11-24 08:45:05)*

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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Noo! He said that the cube is broken

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'

'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'

'You have made another human being happy. There is no greater accomplishment.' -bobbym

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,859

Are you saying that he has one, but it is broken. How badly ? I may be able to say how you can put it back together. Depends if the springs are still good.

Bob

ps. Tell him that an unbroken cube is good for mathematical development but a broken one is good for engineering development. If it helps you may quote me on this to him.

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,917

Some cubists are Picasso.

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

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

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,859

No. This is inverted logic.

Some Picassos are cubists.

Bob

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,917

Both are true. There exists a cubist who is a Picasso.

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

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

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,859

Fair point. I stand corrected.

Bob

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,917

Great. Now we can let Zygons be Zygons.

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

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

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,859

But I thought the trick was to make them think they were not Zygons.

B

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,917

Well, the geek girls figured out which was which.

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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**roniman****Member**- Registered: 2013-11-24
- Posts: 22

Wow, this thread jumped the shark fast! Is this how u guys/gals welcome everyone?!

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,917

Most threads here have a topic jump at least once.

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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**roniman****Member**- Registered: 2013-11-24
- Posts: 22

Yeah, and the puns run amuck! I like it here a lot!

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,917

True that.

bob bundy wrote:

Fair point. I stand corrected.

Bob

And you stand correctly.

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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and normal to the ground

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'

'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'

'You have made another human being happy. There is no greater accomplishment.' -bobbym

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,917

And right way up.

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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Is it okay to say that: Some A is B <=> Some B is A

'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'

'You have made another human being happy. There is no greater accomplishment.' -bobbym

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,917

It is. I can't think of a counter-example.

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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The next person will explain why he is learning prolog

'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'

'You have made another human being happy. There is no greater accomplishment.' -bobbym

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,917

Because we are doing it in school.

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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