Author Topic: The Beauty of Math (Read 4618 times)

ACAMS · « **on:** September 19, 2007, 11:57:52 PM »

Beauty of Math !
//
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 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=123456789 87654321

kcdowdy · « **Reply #1 on:** September 20, 2007, 02:45:47 AM »

Wow! Wow! Wow!

SpyGuy · « **Reply #2 on:** September 28, 2007, 01:59:33 PM »

Remember the song, "12 Days of Christmas"? How many presentss were received during those twelve days?
Look:

On the:
1st day - 1 present (a partridge in a pear tree - I'm not going through all of 'em)
2nd day - 2 + 1 = 3
3rd day - 3 + 2 +1 = 6
4th day - 4 + 3 + 2 + 1 = 10
5th day - 5 + 4 + 3 + 2 + 1 = 15
6th day - 6 + 5 + 4 + 3 + 2 + 1 = 21
7th day - 7 + 6 + 5 + 4 + 3 + 2 + 1 = 28
8th day - 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 36
9th day - 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 45
10th day - 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 55
11th day - 11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 66
12th day - 12 + 11 + 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 78

Sooo.. 1+3+6+10+15+21+28+36+45+55+66+78 = 364 +1 (Christmas Day) = 365, or the number of days in a year .....

Somewhere, a friend and I also figured out how much all of these things would cost, too - as soon as i find it. I'll post it.

For some other good and interesting math equations, try the "Necroscope" series by Brian Lumley - some very intriguing mathematical questions woven into the story.....

z1271beta · « **Reply #3 on:** September 30, 2007, 04:22:00 AM »

booooo....

i hate math lol O_o

Naryar · « **Reply #4 on:** October 15, 2008, 02:55:56 PM »

goose · « **Reply #5 on:** October 15, 2008, 03:04:10 PM »

Reier · « **Reply #6 on:** October 15, 2008, 03:38:42 PM »

Lol, that's a good one. =P

Sage · « **Reply #7 on:** October 15, 2008, 03:40:03 PM »

Naryar · « **Reply #8 on:** October 15, 2008, 04:17:14 PM »

Sage you're awesome.

Anyways,

Sage · « **Reply #9 on:** October 15, 2008, 04:27:58 PM »

hey naryar, looks like you're getting some reputation. congrats.

Naryar · « **Reply #10 on:** October 15, 2008, 04:53:38 PM »

Quote from: Sage;17407

hey naryar, looks like you're getting some reputation. congrats.

Good or bad? :icon_twisted:

Sage · « **Reply #11 on:** October 15, 2008, 05:11:06 PM »

Quote from: Naryar;17411

Good or bad? :icon_twisted:

you never can tell can you.

DuckRA2 · « **Reply #12 on:** October 15, 2008, 05:24:03 PM »

Ive seen the one goose did many times, and I still think its funny

Somebody · « **Reply #13 on:** October 16, 2008, 06:09:26 AM »

3y + 6x=18

Find the y and x intercepts, and slope.

Gigafrost · « **Reply #14 on:** October 16, 2008, 11:36:14 AM »

Sage · « **Reply #15 on:** October 16, 2008, 11:37:20 AM »

slope= -2, y-intercept= 6, x-intercept= 3

(answer to somebody's question)

Somebody · « **Reply #16 on:** October 16, 2008, 02:24:06 PM »

Correct! :-D

Serge · « **Reply #17 on:** October 16, 2008, 04:23:46 PM »

Flying_Chao · « **Reply #18 on:** October 16, 2008, 04:28:41 PM »

How did you get " a - 1 = a + 1 " ?

Serge · « **Reply #19 on:** October 16, 2008, 04:30:50 PM »

Another one: