A Little MATH---

andrez
By andrez

Find the 6th Number?

1, 2, 6, 42, 1806, _______?

By force1• 10 Nov 2008 18:03
force1

true

even I have been tricked on tests where the use of diagrams and a paragraph of writing simply cause out minds to shift gears in the wrong direction.

the truth of math lies in being able to relate a to b and b to c.

everything is relative to everything else!

By yano_08• 10 Nov 2008 18:00
yano_08

the thread calls for little math...

but algebra can be made tricky,

if you play the words :)

By force1• 10 Nov 2008 17:48
force1

hey, simple algebra,

7 4 6 5 8

i do further math as school, this stuff is common knowledge for us

By yano_08• 10 Nov 2008 17:37
yano_08

why all of a sudden your diagram changed?

unless you show a clear diagram that clearly defines your problem... i will simply consider it as rubbish, just like you had said... hahahahaha!!

By bleu• 10 Nov 2008 17:33
bleu

the cable would be 150m long, it would hit the ground 80m from the tall tower.

By Default Nick• 10 Nov 2008 17:29
Rating: 3/5
Default Nick

The solution is very easy as I have never mentioned about Calculus its in simple geometry. The shortest distance from one tower two the other one is the hypotenuse since this is a simple 3-4-5 triangle the correct answer is 150m. I am sure you have so much rubbish in your brain like type of cable, temperature, humidity but do you know how to use your brain?

I 90m

I

I

I

I_______________________I

I

I

I

I_______________________I

"What doesn't kill me; makes me stronger..."

By yano_08• 10 Nov 2008 16:28
yano_08

here goes;

A man wanted to get into his work building, but he had forgotten his code. However, he did remember five clues. These are what those clues were:

The fifth number plus the third number equals fourteen.

The fourth number is one more than the second number.

The first number is one less than twice the second number.

The second number plus the third number equals ten.

The sum of all five numbers is 30.

What were the five numbers?

By yano_08• 10 Nov 2008 15:12
yano_08

"My grandson is about as many days as my son is weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 100 years. Can you tell me my age in years?"

.

.

.

let x = age of grandson in years

y = age of son in years

z = your age in years

no. of "x" age in days = no. of "y" age in weeks

x = y / 7 ; y =7x

no. of "x" age in months = no. of "z" age in years

x = z / 12 ; z =12x

then, x + y + z = 100

substitute y and z;

x + 7x + 12x = 100

or,

20x = 100

x = 5

y = y*x = 35

z = x*12 = 60

By yano_08• 10 Nov 2008 15:10
Rating: 4/5
yano_08

if he is referring to a cable that sags and barely touching the ground, then it's not what i'm thinking.

i am thinking of a 'Stay' cable tied at the apex of towers and on a collinear point on the ground between 2 towers which must be defined by maxima/minima to determine the least length.

yeah, as what DMS said, if you want to be precise on the answer, you must give the cable properties, temperature, wind factors etc. etc. etc... then we will give you your answers.

i'll drop this one, due to ambiguity and let others do the math... ;)

By yano_08• 10 Nov 2008 15:09
yano_08

from geometry to calculus to mechanics/strength of materials...

ok, you solve your problem DN and impress us..... ;)

By greentea• 10 Nov 2008 15:09
greentea

got so much of these stuff back in university days... calculus... probability... numbers... let all these be just be memories :)

By anonymous• 10 Nov 2008 15:01
anonymous

the other one is simply a string or an imaginary string or cable that you tied on each apex of the towers and hold it touching anywhere in the ground and just measuring the distances on each point of contact.

I am still confused DN, maybe I already forgot the math I taught when I am still a professor of Civil Engineering 20 years ago! Please enlighten me of your "little math" as this is the title of this thread!

"dgoodrebel will always be the rebellious good one"

By anonymous• 10 Nov 2008 14:37
anonymous

Geometry when you can not even sure about the question falls under geometry or calculus?

And I am not judging others, not everybody understand geometry or calculus or even what you are asking?

If you are asking just to connect it, then thats plain Geometry or even Trigo, but letting the cable touch the ground, tell me what kind of cable? What are the properties of the cable? The weight , elasticity what else, did I forget something, Yano?

"dgoodrebel will always be the rebellious good one"

By Default Nick• 10 Nov 2008 14:36
Rating: 4/5
Default Nick

I have to leave for a while. I will check when I will be back if somebody finds the correct answer. Bye for now.

Edit: Lets not get far from question itself :)

You have two towers with the height of 60m and 30m. The distance between them is 120m. What will be the minimum length of a cable if you need to connect their top while you have to touch the ground. (I tried to draw it as much as i can to make it easy to understand. Its up to you from where you touch the ground)

Edit:Its not appearing as its shown in preview. I had to edit it. "^" is used for blank. Sorry.

l\ 60m

l.\

l..\^^^^^^^^^/l 30m

l...\___________/ l

120m

"What doesn't kill me; makes me stronger..."

By yano_08• 10 Nov 2008 14:34
yano_08

im just stating facts. besides, this is not my post...

no offense taken

By Default Nick• 10 Nov 2008 14:30
Default Nick

You are not the person to judge people for, what they are putting on main forum unless its offensive. If you care so much about other people care about your staff as a project manager instead of judging people here.

"What doesn't kill me; makes me stronger..."

By anonymous• 10 Nov 2008 14:30
anonymous

I apologize, happy now?

"dgoodrebel will always be the rebellious good one"

By yano_08• 10 Nov 2008 14:29
yano_08

as i see it...

it is in socialising thread... so what gives??

By yano_08• 10 Nov 2008 14:26
yano_08

that is actually a maxima/minima problem in calculus... are your sure it's geometry?

the way i see it, it is two right triangle with both hypotenuse combined equivalent as the cable length...

the point at the ground must be defined to produce the least cable length.

you invoked the word "minimum" so it automatically falls to calculus' maxima/minima category...

By Default Nick• 10 Nov 2008 14:24
Default Nick

Its simple geometry :-P

"What doesn't kill me; makes me stronger..."

By anonymous• 10 Nov 2008 14:24
anonymous

not everybody can relate to it! Or is this the way to make other disappear for a while in the forum (because it takes time to answer your quizzes, Mr. Mathematicians)!

"dgoodrebel will always be the rebellious good one"

By Default Nick• 10 Nov 2008 14:21
Rating: 5/5
Default Nick

You have two towers with the height of 60m and 30m. The distance between them is 120m. What will be the minimum length of a cable if you need to connect their top while you have to touch the ground. (I tried to draw it as much as i can to make it easy to understand. Its up to you from where you touch the ground)

Edit:Its not appearing as its shown in preview. I had to edit it. "^" is used for blank. Sorry.

l\ 60m

l.\

l..\^^^^^^^^^/l 30m

l...\___________/ l

120m

"What doesn't kill me; makes me stronger..."

By sulmansaeed• 10 Nov 2008 14:20
sulmansaeed

Its 6078350

I am sure:P

By yano_08• 10 Nov 2008 14:13
Rating: 2/5
yano_08

1, 1, 2, 3, 5, 8, 13, 21, 34.....

i love fibonacci in application to stocks retracements..

By Eagley• 10 Nov 2008 14:10
Eagley

OMG! Numbers + me = 0

*****************************************

Life is short. Live it to the fullest!

By Default Nick• 10 Nov 2008 14:04
Default Nick

I like Fibonacci's serial :)

1, 1, 2, 3, 5, 8, ...

"What doesn't kill me; makes me stronger..."

By svelte_saggi• 10 Nov 2008 12:18
Rating: 4/5
svelte_saggi

i've been thinking about dis one....

My grandson is about as many days as my son is weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 100 years. Can you tell me my age in years?

By shamsiec• 9 Nov 2008 18:34
shamsiec

not hard at allll...

By haddoc• 9 Nov 2008 18:23
Rating: 3/5
haddoc

where 'n' is the previous number!!!

I think this is a silly thing doing the rounds here in Qatar. All of a sudden we have some 'mathemagicians' trying to outsmart one another.

By qatarisun• 9 Nov 2008 18:21
Rating: 4/5
qatarisun

it was piece of cake..

*********************

“You become responsible forever for what you have tamed”. Antoine de Saint-Exupéry

By bleu• 9 Nov 2008 18:15
bleu

$a_{1}=1 $

$a_{n+1}=a_{n}(a_{n}+1) $

By force1• 9 Nov 2008 17:57
force1

okay u guys r rlly smart rite.. find me the sum of the terms from 10-40.

ie. find me the sum of the 10th number in the series until the 40th no. in the series...go...

By OverLord• 9 Nov 2008 17:20
OverLord

lol.:P

DaRuDe said tess_916 ...

out in jungle hunting mice

By DaRuDe• 9 Nov 2008 16:28
Rating: 4/5
DaRuDe

out in jungle hunting mice

By OverLord• 9 Nov 2008 15:43
Rating: 3/5
OverLord

I will put 2 new onez up in 5mins lets see if you can all solve those!!

By andrez• 9 Nov 2008 15:24
andrez

yes MD thats the formula.....

=========================

"liFe wAs lIkE a bOx oF cHocOlAtEs. yOu nEveR kNow

wHaT yOu'Re gOnNa gEt." ================================

By anonymous• 9 Nov 2008 15:23
Rating: 4/5
anonymous

3263442 is correct. You multiply the number with n+1 where n is the number itself. So the next after the next would be

10650053687364.

By who.am.i• 9 Nov 2008 14:58
Rating: 5/5
who.am.i

lol. you multiply the number by itself and add the same number once. yeah right, not hard.

cheers,

paul

By andrez• 9 Nov 2008 14:54
Rating: 2/5
andrez

its not that hard ....

=========================

"liFe wAs lIkE a bOx oF cHocOlAtEs. yOu nEveR kNow

wHaT yOu'Re gOnNa gEt." ================================

By who.am.i• 9 Nov 2008 14:54
Rating: 5/5
who.am.i

i think i know the answer.. is it 3263442?

cheers,

paul

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