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

ShivamS
Member
Registered: 2011-02-07
Posts: 3,648

Re: 10 second questions


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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,325

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,334

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.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,325

Re: 10 second questions

Hi;



In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,334

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.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,016

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

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#4832 2014-05-22 01:55:51

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,325

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,334

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.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,325

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,334

Re: 10 second questions

Hi bobbym,

The solution #4981 is perfect. Splendid!

#4982. Find the value of x

.

#4983


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,325

Re: 10 second questions

Hi;



In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,334

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.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,325

Re: 10 second questions

Hi;



In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,334

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.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,325

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

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: 21,334

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
.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,325

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,334

Re: 10 second questions

Hi bobbym,

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

#4989.

#4990.


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 105,325

Re: 10 second questions

Hi;


In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ShivamS
Member
Registered: 2011-02-07
Posts: 3,648

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: 105,325

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.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ShivamS
Member
Registered: 2011-02-07
Posts: 3,648

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: 105,325

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.
If it ain't broke, fix it until it is.
No great discovery was ever made without a bold guess.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 21,334

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!


It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi. 

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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