[Show all top banners]

lurey
Replies to this thread:

More by lurey
What people are reading
Subscribers
:: Subscribe
Back to: Kurakani General Refresh page to view new replies
 Beauty of Maths

[Please view other pages to see the rest of the postings. Total posts: 40]
PAGE:   1 2 NEXT PAGE
[VIEWED 12391 TIMES]
SAVE! for ease of future access.
The postings in this thread span 2 pages, View Last 20 replies.
Posted on 06-07-07 9:15 AM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Beauty of Maths:

1 x 8 + 1 = 9
12 x 8 + 2 = 98
123 x 8 + 3 = 987
1234 x 8 + 4 = 9876
12345 x 8 + 5 = 98765
123456 x 8 + 6 = 987654
1234567 x 8 + 7 = 9876543
12345678 x 8 + 8 = 98765432
123456789 x 8 + 9 = 987654321

1 x 9 + 2 = 11
12 x 9 + 3 = 111
123 x 9 + 4 = 1111
1234 x 9 + 5 = 11111
12345 x 9 + 6 = 111111
123456 x 9 + 7 = 1111111
1234567 x 9 + 8 = 11111111
12345678 x 9 + 9 = 111111111
123456789 x 9 +10= 1111111111

9 x 9 + 7 = 88
98 x 9 + 6 = 888
987 x 9 + 5 = 8888
9876 x 9 + 4 = 88888
98765 x 9 + 3 = 888888
987654 x 9 + 2 = 8888888
9876543 x 9 + 1 = 88888888
98765432 x 9 + 0 = 888888888

and finally take a look at this symmetry

1 x 1 = 1
11 x 11 = 121
111 x 111 = 12321
1111 x 1111 = 1234321
11111 x 11111 = 123454321
111111 x 111111 = 12345654321
1111111 x 1111111 = 1234567654321
11111111 x 11111111 = 123456787654321
111111111 x 111111111=12345678987654321
 
Posted on 06-07-07 9:21 AM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 
 
Posted on 06-07-07 2:06 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 
 
Posted on 06-07-07 3:26 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Very tricky math!
(This must be done in your head only. DO NOT use paper and pencil or a calculator. Try it)
Question:::::Take 1000 and add 40 to it. Now add another 1000. Now add 30. Add another 1000. Now add 20. Now add another 1000. Now add 10. What is the total?
..............................................................
....................................................................
............................................................................
..................................................................................
ANSWER:::Did you get 5000? The correct answer is actually 4100.Don't believe it? Check with your calculator! ;)
 
Posted on 06-07-07 3:41 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

nicee one chicago bull
 
Posted on 06-07-07 4:36 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

i got 4100
whats the problem?
 
Posted on 06-07-07 7:02 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 
 
Posted on 06-07-07 7:34 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Bull doesn't know how to add.
 
Posted on 06-07-07 7:44 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Thats Y I asked u guys
 
Posted on 06-07-07 7:47 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 
 
Posted on 06-07-07 8:45 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Another Question. What is the size of largest square that can be inscribed in a unit cube?
Note** The answer can be easily googled so the important thing is not the answer
itself it is the process. Lets see how many unique processes can we see.
 
Posted on 06-07-07 9:09 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Square formed in diagonal of the cube.
 
Posted on 06-07-07 9:54 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

@bluemoon close enough, now can you calculate the size too and post the
method as well.
 
Posted on 06-07-07 11:27 PM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Even though I don't have an answer, I don't think blue_moon's answer is close enough. I will try to solve it. Good question.
 
Posted on 06-08-07 12:13 AM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

@propensity Good luck!!
 
Posted on 06-08-07 12:58 AM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

divdude,

Let us consider a unit cube lying on a plane on one of its faces. When a vertical plane passing through a diagonal of the cube's horizontal faces is slowly rotated about a line that is parallel to the diagonal but passes through the center of the cube, a time will come when the intersection points of the plane and two pairs of diagonally opposite edges of the cube will exactly form a square. This will be the largest square that can be inscribed in the cube.

If the plane intersects each of these edges at a distance of x from the diagonally opposite vertices of the cube, then for the intersection to be a square,

x^2 + x^2 = (1-x)^2 + (1-x)^2 + 1

which implies x = 3/4.

The length of each side of the square is then (3/4)*(2)^0.5. So the square's area will be 9/8.

 
Posted on 06-08-07 5:31 AM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

@gemmi nice work. Very intuitive method. Fellas any more methods?
 
Posted on 06-08-07 7:03 AM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

Thats the one I was saying
 
Posted on 06-08-07 7:07 AM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

ok i think the beauty part was over after i posted my original stuff....all these are ugliness of maths :P
 
Posted on 06-08-07 7:40 AM     Reply [Subscribe]
Login in to Rate this Post:     0       ?    
 

@lurey lol
As they say beauty is in the eyes of beholder.
 



PAGE:   1 2 NEXT PAGE
Please Log in! to be able to reply! If you don't have a login, please register here.

YOU CAN ALSO



IN ORDER TO POST!




Within last 200 days
Recommended Popular Threads Controvertial Threads
ChatSansar.com Naya Nepal Chat
TPS Re-registration case still pending ..
Toilet paper or water?
Anybody gotten the TPS EAD extension alert notice (i797) thing? online or via post?
ढ्याउ गर्दा दसैँको खसी गनाउच
Sajha Poll: Who is your favorite Nepali actress?
Problems of Nepalese students in US
TPS EAD auto extended to June 2025 or just TPS?
whats wrong living with your parents ?
Mamta kafle bhatt is still missing
Ajay Kumar Dev sentenced to 378 yrs
Why Americans reverse park?
Now Trump is a convicted criminal .
Tourist Visa - Seeking Suggestions and Guidance
TPS advance parole Travel document i-131, Class of Admission ?
Nepali Passport Renewal
Biden said he will issue new Employment visa for someone with college degree and job offers
To Sajha admin
TPS Renewal Reregistration
मैले नबुझेका केहि गीत का lyrics हरु
NOTE: The opinions here represent the opinions of the individual posters, and not of Sajha.com. It is not possible for sajha.com to monitor all the postings, since sajha.com merely seeks to provide a cyber location for discussing ideas and concerns related to Nepal and the Nepalis. Please send an email to admin@sajha.com using a valid email address if you want any posting to be considered for deletion. Your request will be handled on a one to one basis. Sajha.com is a service please don't abuse it. - Thanks.

Sajha.com Privacy Policy

Like us in Facebook!

↑ Back to Top
free counters