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

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

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

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 102,306

### 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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,097

### 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
From: Bumpkinland
Registered: 2009-04-12
Posts: 102,306

### 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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,097

### 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: 16,000

### 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
From: Bumpkinland
Registered: 2009-04-12
Posts: 102,306

### 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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,097

### 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
From: Bumpkinland
Registered: 2009-04-12
Posts: 102,306

### 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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,097

### 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
From: Bumpkinland
Registered: 2009-04-12
Posts: 102,306

### 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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,097

### 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
From: Bumpkinland
Registered: 2009-04-12
Posts: 102,306

### 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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,097

### 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
From: Bumpkinland
Registered: 2009-04-12
Posts: 102,306

### 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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Online

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

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

Hello

Thanks

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,097

### 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.

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

bobbym
From: Bumpkinland
Registered: 2009-04-12
Posts: 102,306

### 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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,097

### 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
From: Bumpkinland
Registered: 2009-04-12
Posts: 102,306

### 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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

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
From: Bumpkinland
Registered: 2009-04-12
Posts: 102,306

### 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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

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
From: Bumpkinland
Registered: 2009-04-12
Posts: 102,306

### 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.
A number by itself is useful, but it is far more useful to know how accurate or certain that number is.

Online

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

ganesh
Moderator
Registered: 2005-06-28
Posts: 20,097

### 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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