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Author Topic: Little Maths Game  (Read 19082 times)

Offline Mr.Dodo

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Little Maths Game
« on: February 26, 2012, 03:16:20 PM »
So lets play Maths game :D
Rules are simple you have to solve maths task written on previous post
and post new maths task bellow.
If sombody post wrong number, straighten it in your post.
Simple?
Try not to use calculator.

So lets start:
2 + 8 x 2 = ?

Offline lubbies

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Re: Little Maths Game
« Reply #1 on: February 26, 2012, 03:25:02 PM »
18

5+9x9=
Grafics Cat <3

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Offline Jerry

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Re: Little Maths Game
« Reply #2 on: February 26, 2012, 04:37:48 PM »
86

d( ln(sin(x))/x^2 )/dx =
Given x = pi
No one can go back and change a bad beginning; but anyone can start now and create a successful ending.
If a problem can be solved, no need to worry about it. If it cannot be solved what is the use of worrying?

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Offline Vaderico

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Re: Little Maths Game
« Reply #3 on: March 18, 2012, 05:37:40 AM »
^demolishes thread game^

Offline Tickles

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Re: Little Maths Game
« Reply #4 on: March 18, 2012, 01:01:56 PM »
86

d( ln(sin(x))/x^2 )/dx =
Given x = pi

can we make it a rule that stuff this complicated is not allowed?

So I'm going to continue without answering this one.

51x283 (No Calculator)
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Offline BlazingApollo

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Re: Little Maths Game
« Reply #5 on: March 18, 2012, 01:07:10 PM »
14,433?

(1-1/2)(1-1/3)(1-1/4)(1-1/5).......(1-1/20) =

Seems complicated, but it's not, actually.

EDIT: Read as= (one minus 1/2)times(one minus 1/3)times(one minus 1/4) until (1 minus 1/20)
There's no power thingy
« Last Edit: March 18, 2012, 01:40:38 PM by BlazingApollo »


Final Examination is coming faster than I thought D:

Offline Papi

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Re: Little Maths Game
« Reply #6 on: March 18, 2012, 01:49:11 PM »

d( ln(sin(x))/x^2 )/dx =
Given x = pi

Sin(pi)=0, ln(0/pi^2)=ln(0)=impossible
 
No answer I think ;o

Quote
(1-1/2)(1-1/3)(1-1/4)(1-1/5).......(1-1/20) =

1/20?


4[squareroot(64)]+95x12.
« Last Edit: March 18, 2012, 01:51:15 PM by Papi »

Offline BlazingApollo

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Re: Little Maths Game
« Reply #7 on: March 18, 2012, 02:00:27 PM »

Quote
(1-1/2)(1-1/3)(1-1/4)(1-1/5).......(1-1/20) =

1/20?


4[squareroot(64)]+95x12.
Correct sir!

Hmm, 32+1140= 1172?


1+1=

(-__-") run out of question....


Final Examination is coming faster than I thought D:

Offline Arctus

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Re: Little Maths Game
« Reply #8 on: March 18, 2012, 10:21:59 PM »

Quote
(1-1/2)(1-1/3)(1-1/4)(1-1/5).......(1-1/20) =

1/20?


4[squareroot(64)]+95x12.
Correct sir!

Hmm, 32+1140= 1172?


1+1=

(-__-") run out of question....

I believe that The answer to Papi's question is 9,772 due to 32 + (95 x 12) where 95 x 12 = 9740
And 1+1=2

Now Find the common ratio in this geometric sequence, and determine the next term:  3, 12, 48, 192,...
or you can multiply 20 by 342 for a different question.

Edit: I honestly don't know what i was thinking when i said 95x12 was 9740, it was an extremely stupid moment i'm not proud of.
« Last Edit: March 19, 2012, 06:22:02 AM by Arctus »

Offline Shadowfred

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Re: Little Maths Game
« Reply #9 on: March 19, 2012, 12:00:40 AM »
95x12 is 1140.

768 is the next term as 4 is the ratio.

20 x 342 = 6840

And for my question

13/7 + 5/11 = ?

Offline Jerry

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Re: Little Maths Game
« Reply #10 on: March 20, 2012, 07:56:00 AM »

d( ln(sin(x))/x^2 )/dx =
Given x = pi

Sin(pi)=0, ln(0/pi^2)=ln(0)=impossible
 
No answer I think ;o

Well, you should be applying the value of x later, but well, I can't blame you either :P There is no definite answer, right! ^-^

First use the quotient rule;

d( ln(sin(x))/x^2 )/dx = (x^2 cos(x)/sin(x) - 2x ln(sin(x)) / x^4)

Simplify; (x^2 cos(x)/sin(x) - 2x ln(sin(x)) / x^4) = (x cos(x)/sin(x) - 2 ln(sin(x)) )/ x^3)

Then put x = pi;

(pi cos(pi)/sin(pi) - 2 ln (sin(pi)) ) / pi^3

\infty - 2(-\infty) / pi^3 = indefinite solution

;D


13/7 + 5/11 = 1 (6/7) + 5/11 = 1 + (66+35)/77 = 1 + 101/77 = 2 24/77


Oh well. Another 'sequence';

3, 4, 6, 8, 12, 14, 18, 20, 24, 30, ?
No one can go back and change a bad beginning; but anyone can start now and create a successful ending.
If a problem can be solved, no need to worry about it. If it cannot be solved what is the use of worrying?

Currently playing Pokemon XY/ORAS/Shuffle and Clash of Clans and testing out PokemonRevolutionOnline and Dragonmon Hunter....
Also, forum notification emails are not getting in my inbox... again...

Offline Arctus

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Re: Little Maths Game
« Reply #11 on: March 20, 2012, 11:42:33 AM »
Is that the first 10 prime numbers +1, if so, then the next number would be 32.

Ummm. 5x2+3+7x0+12.5-1.

Offline Jerry

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Re: Little Maths Game
« Reply #12 on: March 20, 2012, 12:12:23 PM »
5x2+3+7x0+12.5-1 = 10 + 3 + 0 + 12.5 - 1 = 24.5

Hmm, how about this one?
3, 3, 5, 4, 4, 3, 5, 5, 4, 3, 6, 6, ?
No one can go back and change a bad beginning; but anyone can start now and create a successful ending.
If a problem can be solved, no need to worry about it. If it cannot be solved what is the use of worrying?

Currently playing Pokemon XY/ORAS/Shuffle and Clash of Clans and testing out PokemonRevolutionOnline and Dragonmon Hunter....
Also, forum notification emails are not getting in my inbox... again...

Offline Flynt

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Re: Little Maths Game
« Reply #13 on: March 20, 2012, 12:35:42 PM »
5x2+3+7x0+12.5-1 = 10 + 3 + 0 + 12.5 - 1 = 24.5

Hmm, how about this one?
3, 3, 5, 4, 4, 3, 5, 5, 4, 3, 6, 6, ?
8.

Offline Mr Pokemon

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Re: Little Maths Game
« Reply #14 on: March 21, 2012, 04:30:59 AM »
8=8?
You didn't give me a problem.
This shouldn't be too hard, just takes a little bit of time.
Domain of f(g(h(x))) given f(x)=(9^1/2)/(2x-2)  g(x)=-5x^1/2  and f(x)=(128x^1/7)+3