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#4826 2014-05-20 13:53:03

ShivamS
Member
Registered: 2011-02-07
Posts: 3,531

Re: 10 second questions


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#4827 2014-05-20 14:49:56

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,542

Re: 10 second questions

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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#4828 2014-05-21 02:19:10

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,428

Re: 10 second questions

Hi ShivamS and bobbym,

The solutions #4975 and #4976 are correct. Marvelous!

#4977. If

and
, find the value of
.

#4978. If a + b + c = 13,

, find the value of
ab + bc + ca.


Character is who you are when no one is looking.

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#4829 2014-05-21 02:36:19

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,542

Re: 10 second questions

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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#4830 2014-05-22 00:40:53

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,428

Re: 10 second questions

Hi bobbym,

The solutions #4977 and #4978 are correct. Excellent!

#4979. If

and x + y = 3z, then find the value of z.

#4980.


Character is who you are when no one is looking.

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#4831 2014-05-22 01:22:45

anonimnystefy
Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,522

Re: 10 second questions

Hi ganesh


“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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#4832 2014-05-22 01:55:51

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,542

Re: 10 second questions

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.

Online

#4833 2014-05-22 13:58:51

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,428

Re: 10 second questions

Hi anonimnystefy and bobbym,

The solution #4980 is perfect, anonimnystefy! Excellent!
bobbym, I made a mistake in the problem; regretted.

#4981.


Character is who you are when no one is looking.

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#4834 2014-05-22 20:27:31

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,542

Re: 10 second questions

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.

Online

#4835 2014-05-23 00:59:51

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,428

Re: 10 second questions

Hi bobbym,

The solution #4981 is perfect. Splendid!

#4982. Find the value of x

.

#4983


Character is who you are when no one is looking.

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#4836 2014-05-23 03:06:41

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,542

Re: 10 second questions

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.

Online

#4837 2014-05-23 15:53:06

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,428

Re: 10 second questions

Hi bobbym,

#4984. How many pieces of 85 cm length can be cut from a rod 42.5 meters long?

#4985.


Character is who you are when no one is looking.

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#4838 2014-05-24 01:33:07

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,542

Re: 10 second questions

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.

Online

#4839 2014-05-24 02:11:31

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,428

Re: 10 second questions

Hi bobbym,

The solution [hide=#4984]I get 50.
Number of pieces = 42.5 x 100/85 = 4250/85 = 50

The solution #4985 is perfect. Exemplary!

PS : Thanks for the replies. I shall post 'English Language Puzzles' soon.

#4986.


Character is who you are when no one is looking.

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#4840 2014-05-24 02:20:54

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,542

Re: 10 second questions

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.

Online

#4841 2014-05-24 19:04:47

Denominator
Member
Registered: 2009-11-23
Posts: 155

Re: 10 second questions

Hello

Thanks smile

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#4842 2014-05-24 22:46:02

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,428

Re: 10 second questions

Hi bobbym and Denominator,

The solution #4986 is correct. Stupendous!

#4987. If

, then what is the value of
?

#4988. Given

and
,
find the value of
.


Character is who you are when no one is looking.

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#4843 2014-05-24 23:18:54

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,542

Re: 10 second questions

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.

Online

#4844 2014-05-25 03:49:57

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,428

Re: 10 second questions

Hi bobbym,

The solutions #4987 and #4988 are correct. Magnificent!

#4989.

#4990.


Character is who you are when no one is looking.

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#4845 2014-05-25 04:02:04

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,542

Re: 10 second questions

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.

Online

#4846 2014-05-25 04:04:07

ShivamS
Member
Registered: 2011-02-07
Posts: 3,531

Re: 10 second questions

I need a little explanation on how 4990 can be done in about 10 seconds.

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#4847 2014-05-25 04:07:08

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,542

Re: 10 second questions

It can be shortened algebraically but still required a calculator.


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.

Online

#4848 2014-05-25 04:09:54

ShivamS
Member
Registered: 2011-02-07
Posts: 3,531

Re: 10 second questions

Okay, because I thought I was missing something.

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#4849 2014-05-25 04:10:49

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 86,542

Re: 10 second questions

I can not even write the problems down in less than a minute. 10 seconds, I am too slow for that.


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.

Online

#4850 2014-05-25 04:22:52

ganesh
Moderator
Registered: 2005-06-28
Posts: 14,428

Re: 10 second questions

Hi bobbym and ShivamS,

I made a mistake owing to my poor vision. The problem actually stated:

#4990.

The corrected version :

#4990.

Inconvenience regretted!


Character is who you are when no one is looking.

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