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#1 2013-06-02 03:06:25

Agnishom
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From: The Complex Plane
Registered: 2011-01-29
Posts: 18,205
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Possible Lego People

Miles has 4 Lego people in his Lego town. A Lego person consists of exactly 1 set of legs, a torso, and a head. All of these body parts are distinct. Miles' son comes in and separates the Lego people into their individual pieces. How many different sets of 4 Lego people can be created from the pieces?

Details and assumptions
You should not form a Lego person from a head, another head and another head.

The order in which the Lego people are formed doesn't matter.

Whats wrong?


'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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#2 2013-06-02 04:07:38

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,609

Re: Possible Lego People

I am getting (4!)^2.

Your solution because you allow for any of tthe parts to be used twice.


“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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#3 2013-06-02 13:27:28

Agnishom
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From: The Complex Plane
Registered: 2011-01-29
Posts: 18,205
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Re: Possible Lego People

When did I allow that?


'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

Online

#4 2013-06-02 17:03:15

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,124

Re: Possible Lego People

Hi Agnishom;

anonimnystefy's answer is correct. But the question could be tricky. Do you need an explanation?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#5 2013-06-03 02:13:17

Agnishom
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From: The Complex Plane
Registered: 2011-01-29
Posts: 18,205
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Re: Possible Lego People

Yes


'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

Online

#6 2013-06-03 22:18:50

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,124

Re: Possible Lego People

Choose the first head and there are now 4 legs and 4 torsos for 4 x 4 = 16

Choose the second head. 3 x 3 = 9

Choose the third head 2 x 2 =4

16 x 9 x 4 = 576


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#7 2013-06-03 23:51:04

Agnishom
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From: The Complex Plane
Registered: 2011-01-29
Posts: 18,205
Website

Re: Possible Lego People

I still do not get this.
Why does the number of legs and torsoes decreasing?


'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

Online

#8 2013-06-04 04:07:46

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,609

Re: Possible Lego People

Because you cannot use a torso or a pair of legs if you have already used them.


“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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#9 2013-06-04 04:54:46

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,124

Re: Possible Lego People

Hi Agnishom;

The decreasing always happens when you sample without replacement.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#10 2013-06-04 16:18:44

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 18,205
Website

Re: Possible Lego People

anonimnystefy wrote:

Because you cannot use a torso or a pair of legs if you have already used them.

What! Why??

Where does the question imply that?


'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

Online

#11 2013-06-04 17:41:25

barbie19022002
Member
Registered: 2013-05-24
Posts: 1,314

Re: Possible Lego People

anonimnystefy wrote:

Because you cannot use a torso or a pair of legs if you have already used them.

I can't understand it..


Jake is Alice's father, Jake is the ________ of Alice's father?
Why is T called island letter?
think, think, think and don't get up with a solution...

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#12 2013-06-04 21:09:43

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,124

Re: Possible Lego People

Where does the question imply that?

Because as you are assembling each particular set of them you are using up the pieces.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#13 2013-06-05 05:51:11

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 18,205
Website

Re: Possible Lego People

Oh yeah. Clever.


'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

Online

#14 2013-06-05 05:51:56

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,609

Re: Possible Lego People

Just wondering, where'd you get this problem from?


“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

Online

#15 2013-06-05 05:56:19

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 18,205
Website

Re: Possible Lego People

Brilliant.org


'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

Online

#16 2013-06-05 06:14:38

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,609

Re: Possible Lego People

Hm, which level of Geometry and Combinatorics are you?


“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

Online

#17 2013-06-05 07:28:38

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,124

Re: Possible Lego People

Are you okay with the answer?


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

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#18 2013-06-05 13:33:23

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 18,205
Website

Re: Possible Lego People

No, it will take time to visualise that.

I am in Level 3. What about you?


'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

Online

#19 2013-06-05 13:34:40

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,124

Re: Possible Lego People

I have not been back there since the last time you mentioned it to me.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#20 2013-06-05 13:40:06

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 18,205
Website

Re: Possible Lego People

But you get a level the first time you join it.
I'll bet you're at 5


'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

Online

#21 2013-06-05 13:44:07

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,124

Re: Possible Lego People

I'll bet I am not. You have 7000 points there if I remember.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#22 2013-06-05 17:37:56

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 18,205
Website

Re: Possible Lego People

I don't understand why you are not


'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

Online

#23 2013-06-05 21:13:23

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,124

Re: Possible Lego People

The most powerful restriction I know, time! I can not be here and there at the same time. Since Jane unearthed my clones I have had to put them back into cold storage.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

#24 2013-06-05 23:34:01

Agnishom
Real Member
From: The Complex Plane
Registered: 2011-01-29
Posts: 18,205
Website

Re: Possible Lego People

They Give You A Level When You First Log Into It. By Default Your Level Should Start As Very High


'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

Online

#25 2013-06-05 23:35:28

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 89,124

Re: Possible Lego People

I remember I had 375 or so points. I do not remember my level.

I am on level 5 and have 610 points so far.


In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.

Offline

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