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post #1 of 14 (permalink) Old 05-16-2010, 06:20 AM Thread Starter
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Thumbs up Beautiful Mathematics

Beautiful Mathematics

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

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


Source:http://bestworldstuff.blogspot.com/2010/05/beautiful-mathematics.html
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post #2 of 14 (permalink) Old 05-16-2010, 06:56 AM
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Re: Beautiful Mathematics

Haha.

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post #3 of 14 (permalink) Old 05-16-2010, 07:36 AM
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Re: Beautiful Mathematics

Cool...

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post #4 of 14 (permalink) Old 05-16-2010, 03:24 PM
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Re: Beautiful Mathematics

OMG

Quote:
Originally Posted by philosophicalarf View Post
Armstrong says in-competition testing will never catch anyone, only out-of-competition testing and the blood passport can.

Tennis has no blood passport system, and does basically no out of competition testing.

The methods and drugs used by Armstrong in 1999 would work in tennis right now, with zero chance of being caught (not slightly surprising to anyone familiar with the topic, btw).
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post #5 of 14 (permalink) Old 05-16-2010, 04:18 PM
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Re: Beautiful Mathematics

Trippy.

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post #6 of 14 (permalink) Old 05-16-2010, 04:20 PM
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Re: Beautiful Mathematics

2012 is near.
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post #7 of 14 (permalink) Old 05-16-2010, 05:06 PM
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Re: Beautiful Mathematics

This is very cool
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post #8 of 14 (permalink) Old 05-16-2010, 08:03 PM
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post #9 of 14 (permalink) Old 05-16-2010, 11:26 PM
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Re: Beautiful Mathematics

you know this one?

12345679 x 9 x 1 = 111111111
12345679 x 9 x 2 = 222222222
12345679 x 9 x 3 = 333333333
12345679 x 9 x 4 = 444444444
12345679 x 9 x 5 = 555555555
etc etc etc

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post #10 of 14 (permalink) Old 05-16-2010, 11:35 PM
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Re: Beautiful Mathematics

HERE IS A CUTE ONE!!
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post #11 of 14 (permalink) Old 05-17-2010, 02:02 PM
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Re: Beautiful Mathematics

Quote:
Originally Posted by ExcaliburII View Post
you know this one?

12345679 x 9 x 1 = 111111111
12345679 x 9 x 2 = 222222222
12345679 x 9 x 3 = 333333333
12345679 x 9 x 4 = 444444444
12345679 x 9 x 5 = 555555555
etc etc etc
Well ... This one i knew .. It was in Math Text book in 7th Grade! totally awesome

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post #12 of 14 (permalink) Old 05-17-2010, 02:17 PM
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Re: Beautiful Mathematics

Difference of squares of consecutive integers are the positive odd numbers:

1^2-0^2=1-0=1
2^2-1^2=4-1=3
3^2-2^2=9-4=5
4^2-3^2=16-9=7
5^2-4^2=25-16=9
6^2-5^2=36-25=11
7^2-6^2=49-36=13
8^2-7^2=64-49=15
9^2-8^2=81-64=17
10^2-9^2=100-81=19
...
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post #13 of 14 (permalink) Old 05-19-2010, 06:00 PM Thread Starter
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Re: Beautiful Mathematics

Great Go Mathematicians
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post #14 of 14 (permalink) Old 05-19-2010, 09:27 PM
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Re: Beautiful Mathematics

Read Fermats Last Theorem by Simon Singh for some truly beautiful mathematics.

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