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  1. 5th March 2008, 10:35 PM #1
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    Wongo
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    Thumbs up Maths problem 9999

    Use exactly four 9s and any number of arithmathic or higher level math operations to make numbers from 1 to 20.
    Example
    1=(9+9)/(9+9)
    7=(9+9+sqrt9)/(sqrt9)
    Here is a cracker from a few years back. Have fun.
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  2. 5th March 2008 10:35 PM # ADS
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  3. 5th March 2008, 10:53 PM #2
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    Can't.......got a headache Wongo.......and I will have until you post the answer
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  4. 6th March 2008, 01:38 AM #3
    ss_11000
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    1 = (9+9) / (9+9) ..................................18 / 18 = 1
    2 = (sqrt9 * sqrt9 + 9) / 9 ................................18/9 = 2
    3 = (9+9+9) / 9 .................................27 / 9 = 3
    4 = (sqrt9 * 9 +9) /9.....................36/9 = 4
    5
    6 = sqrt9 ((9+9) / 9)............................ 3 * 18/9 = 6
    7 =(9+9+sqrt9)/(sqrt9)............................ 21/3 = 7
    8 = (9 squared - 9) / sqrt9 * sqrt9...........................72/9 = 8
    9 = (((9*9) / sqrt9) /sqrt9)..........................81 / 3 / 3 = 27/3 = 9
    10 =( sqrt9 * 9 + sqrt9) /sqrt9.............................30 / 3 = 10
    11 = (9 squared + 9 + 9 ) / 9.....................99/9 = 11
    12 = sqrt9 + sqrt9 +sqrt9 +sqrt9...................3+3+3+3 = 12
    13
    14 = (9 squared + sqrt9) / (sqrt9 + sqrt9 )......................(81 + 3) / 6 =
    15 = sqrt 9 * 9 - sqrt 9 - 9...................3*9 -12 = 15
    16
    17
    18 = sqrt 9 * sqrt9 + sqrt9 *sqrt9...................9+9 = 18
    19
    20

    i'll do the rest later. its to late to think lol
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  5. 6th March 2008, 02:00 AM #4
    ss_11000
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    Quote Originally Posted by ss_11000 View Post
    1 = (9+9) / (9+9) ..................................18 / 18 = 1
    2 = (sqrt9 * sqrt9 + 9) / 9 ................................18/9 = 2
    3 = (9+9+9) / 9 .................................27 / 9 = 3
    4 = (sqrt9 * 9 +9) /9.....................36/9 = 4
    5 = (9+sqrt9+sqrt9) / sqrt9.................15/3 = 5
    6 = sqrt9 ((9+9) / 9)............................ 3 * 18/9 = 6
    7 =(9+9+sqrt9)/(sqrt9)............................ 21/3 = 7
    8 = (9 squared - 9) / sqrt9 * sqrt9...........................72/9 = 8
    9 = (((9*9) / sqrt9) /sqrt9)..........................81 / 3 / 3 = 27/3 = 9
    10 =( sqrt9 * 9 + sqrt9) /sqrt9.............................30 / 3 = 10
    11 = (9 squared + 9 + 9 ) / 9.....................99/9 = 11
    12 = sqrt9 + sqrt9 +sqrt9 +sqrt9...................3+3+3+3 = 12
    13 = (((Sqrt9 + sqrt 9) squared) +sqrt9) / sqrt9 ...........3+3 sqrd +3 / 3 = 39/3 = 13
    14 = (9 squared + sqrt9) / (sqrt9 + sqrt9 )......................(81 + 3) / 6 =
    15 = sqrt 9 * 9 - sqrt 9 - 9...................3*9 -12 = 15
    16
    17 (9+9) - (9/9)......1..........................18-1 = 17
    18 = sqrt 9 * sqrt9 + sqrt9 *sqrt9...................9+9 = 18
    19
    20 =

    i'll do the rest later. its to late to think lol
    .

    geez, some of them ^^^ are overly complicated.

    eg. 2

    9/9 + 9/9 = 1+1 = 2

    no wonder my head hurts lol
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  6. 6th March 2008, 09:17 AM #5
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    The "9 squared" bit is a bit dodgy.

    What's next 9 thirded, 9 tripled or 9 minus five times four ??
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  7. 6th March 2008, 09:24 AM #6
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    Wongo, please do not peddle this #$%^& as it will give everyone a doody of a headache (Except Sheddie)
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  8. 6th March 2008, 09:25 AM #7
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    It's fun. Stirlo is enjoying it.
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  9. 6th March 2008, 01:05 PM #8
    ss_11000
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    Quote Originally Posted by Wongo View Post
    The "9 squared" bit is a bit dodgy.

    What's next 9 thirded, 9 tripled or 9 minus five times four ??
    why???

    it works and thats all that matters
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  10. 6th March 2008, 01:38 PM #9
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    9-9+9²/9=9
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  11. 6th March 2008, 01:43 PM #10
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    Quote Originally Posted by ss_11000 View Post
    why???

    it works and thats all that matters
    No it doesn't grasshopper. 9 squared is not the math operation we want here. It is 9 to the power of 2 (we don't want the 2 here) unless you can find a symbol that does that (for example square root)

    See.

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  12. 6th March 2008, 01:44 PM #11
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    Quote Originally Posted by Gingermick View Post
    9-9+9²/9=9

    Only 9s and symbols sir.
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  13. 6th March 2008, 02:34 PM #12
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    Quote Originally Posted by ss_11000 View Post
    1 = (9+9) / (9+9) ..................................18 / 18 = 1
    2 = (sqrt9 * sqrt9 + 9) / 9 ................................18/9 = 2
    3 = (9+9+9) / 9 .................................27 / 9 = 3
    4 = (sqrt9 * 9 +9) /9.....................36/9 = 4
    5
    6 = sqrt9 ((9+9) / 9)............................ 3 * 18/9 = 6
    7 =(9+9+sqrt9)/(sqrt9)............................ 21/3 = 7 9 - (9 + 9 )/9 = 7
    8 = (9 squared - 9) / sqrt9 * sqrt9...........................72/9 = 8 [( 9 x 9 )-9 ]/9 = 8
    9 = (((9*9) / sqrt9) /sqrt9)..........................81 / 3 / 3 = 27/3 = 9
    10 =( sqrt9 * 9 + sqrt9) /sqrt9.............................30 / 3 = 10 [( 9 x 9 ) + 9 ] / 9 = 10
    11 = (9 squared + 9 + 9 ) / 9.....................99/9 = 11 9 + (9 + 9 ) / 9 = 11
    12 = sqrt9 + sqrt9 +sqrt9 +sqrt9...................3+3+3+3 = 12
    13
    14 = (9 squared + sqrt9) / (sqrt9 + sqrt9 )......................(81 + 3) / 6 =
    15 = sqrt 9 * 9 - sqrt 9 - 9...................3*9 -12 = 15
    16
    17 (9 + 9 ) - ( 9/9 ) = 17
    18 = sqrt 9 * sqrt9 + sqrt9 *sqrt9...................9+9 = 18 [(9+9) /9] x 9 = 18

    19 ( 9 + 9 ) + (9 / 9 ) = 19
    20

    i'll do the rest later. its to late to think lol
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  14. 6th March 2008, 02:43 PM #13
    Ron Dunn
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    Anywhere you used 9-squared, just replace it with (9*9).
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  15. 6th March 2008, 03:08 PM #14
    ss_11000
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    Quote Originally Posted by Ron Dunn View Post
    Anywhere you used 9-squared, just replace it with (9*9).
    but then i might use two many 9's.

    i see your point now scott...does seem like cheating lol


    9 + (9 + 9 ) / 9 = 11...ashore, this one doesnt work
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  16. 6th March 2008, 03:11 PM #15
    ss_11000
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    Quote Originally Posted by ss_11000 View Post
    1 = (9+9) / (9+9) ..................................18 / 18 = 1
    2 = (sqrt9 * sqrt9 + 9) / 9 ................................18/9 = 2
    3 = (9+9+9) / 9 .................................27 / 9 = 3
    4 = (sqrt9 * 9 +9) /9.....................36/9 = 4
    5 = (9+sqrt9+sqrt9) / sqrt9.................15/3 = 5
    6 = sqrt9 ((9+9) / 9)............................ 3 * 18/9 = 6
    7 =(9+9+sqrt9)/(sqrt9)............................ 21/3 = 7
    8 = [( 9 x 9 )-9 ]/9 = 8
    9 = (((9*9) / sqrt9) /sqrt9)..........................81 / 3 / 3 = 27/3 = 9
    10 =( sqrt9 * 9 + sqrt9) /sqrt9.............................30 / 3 = 10
    11 = 9 + sqrt9 - 9/9 9 + (9 + 9 ) / 9 = 11

    12 = sqrt9 + sqrt9 +sqrt9 +sqrt9...................3+3+3+3 = 12
    13 = 9 + sqrt9 + 9/9
    14 =
    15 = sqrt 9 * 9 - sqrt 9 - 9...................3*9 -12 = 15
    16
    17 (9+9) - (9/9)................................18-1 = 17
    18 = sqrt 9 * sqrt9 + sqrt9 *sqrt9...................9+9 = 18
    19 ( 9 + 9 ) + (9 / 9 ) = 19
    20 =

    i'll do the rest later. its to late to think lol
    .

    3 left
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