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  1. 13th March 2008, 02:46 PM #1
    Allan at Wallan's Avatar
    Allan at Wallan
    Allan at Wallan is offline Retiring type.
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    Default Having fun with numbers

    These are only an illustration of having fun with numbers
    ... no need to work out solutions.

    1x8+1=9
    12x8+2=98
    123x8+3=987
    1234x+4=9876
    12345x8+5=98765
    123456x8+6=987654
    1234567x8+7=9876543
    12345678x8+8=98765432
    123456789x8+9=987654321

    1x9+2=11
    12x9+3=111
    123x9+4=1111
    1234x9+5=11111
    12345x9+6=111111
    123456x9+7=1111111
    1234567x9+8=11111111
    12345678x9+9=111111111
    123456789x9+10=1111111111

    1x1=1
    11x11=121
    111x111=12321
    1111x1111=1234321
    11111x11111=123454321
    111111x111111=12345654321
    1111111x1111111=1234567654321
    11111111x11111111=123456787654321
    111111111x111111111=12345678987654321

    No wonder Tax Accountants have an easy job.

    Allan

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    I once stole a calendar - and got 12 months.
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  2. 13th March 2008 02:46 PM # ADS
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  3. 13th March 2008, 03:20 PM #2
    Wongo's Avatar
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    See mathematics is fascinating.
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  4. 13th March 2008, 10:49 PM #3
    joe greiner's Avatar
    joe greiner
    joe greiner is offline Sum ergo cogito (Cogito)
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    Default

    Google ["casting out nines"], with quotes to marry the keywords, for an interesting ancient verification process.

    Joe
    Of course truth is stranger than fiction.
    Fiction has to make sense. - Mark Twain
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  5. 14th March 2008, 03:54 PM #4
    Frank&Earnest
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    Default

    Must have been more exciting 500 years ago, when Tartaglia, Cardano, Del Ferro, Fibonacci etc. were working these things out. Here is another one, just to upset Wongo:

    1/9 = .11111111.......
    2/9 = .22222222.......
    3/9 = .33333333.......
    4/9 = .44444444.......
    5/9 = .55555555.......
    6/9 = .66666666.......
    7/9 = .77777777.......
    8/9 = .88888888.......
    9/9 = .99999999....... = 1
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  6. 14th March 2008, 04:02 PM #5
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    Quote Originally Posted by Frank&Earnest View Post
    ... just to upset Wongo:

    9/9 = .99999999....... = 1
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  7. 14th March 2008, 04:04 PM #6
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    I just invented another one

    1 + 0 = 1
    1 + 1 = 2
    1 + 2 = 3
    1 + 3 = 4
    1 + 4 = 5
    1 + 5 = 6
    1 + 6 = 7
    1 + 7 = 8
    1 + 8 = 9
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  8. 14th March 2008, 04:08 PM #7
    zelk
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    Quote Originally Posted by Wongo View Post
    I just invented another one

    1 + 0 = 1
    1 + 1 = 2
    1 + 2 = 3
    1 + 3 = 4
    1 + 4 = 5
    1 + 5 = 6
    1 + 6 = 7
    1 + 7 = 8
    1 + 8 = 9

    Wongo,

    You're right, maths is interesting, but I reckon you're even more interesting!

    Zelk
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  9. 14th March 2008, 04:33 PM #8
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    I’ll take it as a compliment.
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  10. 14th March 2008, 04:38 PM #9
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    wheelinround
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    FE Must have been more exciting 500 years ago, when Tartaglia, Cardano, Del Ferro, Fibonacci etc. were working these things out. Here is another one, just to upset Wongo:

    1/9 = .11111111.......
    2/9 = .22222222.......
    3/9 = .33333333.......
    4/9 = .44444444.......
    5/9 = .55555555.......
    6/9 = .66666666.......
    7/9 = .77777777.......
    8/9 = .88888888.......
    9/9 = .99999999....... = 1
    500 years ago these guy were like present day government employees not much worth doing today so lets invent something to do and getting paid for sitting on their behind.
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  11. 14th March 2008, 05:25 PM #10
    Ron Dunn
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    I'd rather public servants sat around inventing interesting number tricks than imposing more stupid bloody rules on everything

    Death to the Nanny State. Crucify the Safety Nazis. Hang, Draw and Quarter Harold (Screwball) Scruby.

    Give me numbers any day.
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  12. 14th March 2008, 05:38 PM #11
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    With these numbers they create statistics which lie which people use to create Nazi laws
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  13. 14th March 2008, 05:42 PM #12
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    OK, here's one for the kids...
    12345679 x (9x1) = 111111111
    12345679 x (9x2) = 222222222
    ...etc.
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  14. 14th March 2008, 06:05 PM #13
    Frank&Earnest
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    Quote Originally Posted by wheelinround View Post
    500 years ago these guy were like present day government employees not much worth doing today so lets invent something to do and getting paid for sitting on their behind.
    ? Fibonacci was a trading post manager, Cardano was a physician, Luca Paciolo a university professor... The fact that later in life they might have had a pension from the local potentate is because they had not invented superannuation yet.
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  15. 14th March 2008, 10:38 PM #14
    ss_11000
    ss_11000 is offline You've got to risk it to get the biscuit
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    what did pythagoras do for a living
    S T I R L O
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  16. 14th March 2008, 11:58 PM #15
    Frank&Earnest
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    He was a rich merchant. Shouldn't you be actually studying maths instead of mucking around with this stuff?
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