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Math Help - Zahlenspiel

  1. #1
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    Zahlenspiel

    Each symbol represents a unique digit between 0 and 9. What are the missing three digit numbers for A A A and B B B

    Zahlenspiel-52bef361-1105-49b4-95ff-182a11e9db79.jpg
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  2. #2
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    Re: Zahlenspiel

    Hint: The fact that AAA - BBB does not have three of the same digit should immediately signal something!
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    Re: Zahlenspiel

    Any further help appreciated! Im not that good with math.
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    Re: Zahlenspiel

    All digits are 0 is obviously one solution.
    That it's the only solution follows from the rightmost column, middle digits.
    The filled circle stays the same after an addition, so either the 4-quadrant circle is 9 or it's 0. But if it were 9, then AAA-BBB = 9**, which can't happen. Thus the 4 quadrant circle = 0, and also, from AAA-BBB = 0**, get A=B. From the top row, last two digits, then get filled triangle = filled circle = 0. So A = B = 6-gon = half moon. From middle column, 100's digit, get square = 0. Now the middle column prodcues a contradiction unless all the digits are 0.
    Unless I made a mistake, it works out they're all zero.
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    Re: Zahlenspiel

    Quote Originally Posted by johnsomeone View Post
    All digits are 0 is obviously one solution.
    That it's the only solution follows from the rightmost column, middle digits.
    The filled circle stays the same after an addition, so either the 4-quadrant circle is 9 or it's 0. But if it were 9, then AAA-BBB = 9**, which can't happen. Thus the 4 quadrant circle = 0, and also, from AAA-BBB = 0**, get A=B. From the top row, last two digits, then get filled triangle = filled circle = 0. So A = B = 6-gon = half moon. From middle column, 100's digit, get square = 0. Now the middle column prodcues a contradiction unless all the digits are 0.
    Unless I made a mistake, it works out they're all zero.
    Thanks for that but each symbol represents a unique digit from 0-9. All digits can't be 0 unfortunately.
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    Re: Zahlenspiel

    Unless I made a mistake, or there's something sneaky like the digits aren't base 10, I just gave you an explanation of why they're all *necessarily* zero. If you stipulate that they aren't zero, then that means the problem has no solution.
    Last edited by johnsomeone; October 4th 2012 at 01:04 PM.
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    Re: Zahlenspiel

    Quote Originally Posted by johnsomeone View Post
    Unless I made a mistake, or there's something sneaky like the digits aren't base 10, I just gave you an explanation of why they're all *necessarily* zero. If you stipulate that they aren't zero, then that means the problem has no solution.
    Thanks for your help! You may or may not realise that one of the 4 quadrant circles is not the same as the others. This 4 quadrent circle is the 1st digit of the answer to AAA - BBB. All digits definately do represent a unique digit from 0-9.
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  8. #8
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    Re: Zahlenspiel

    Are you sure there's a solution? I still get that it's impossible, even correcting for that trick. It's certainly possible I made a mistake somewhere. Do you have an actual solution?

    Same rationale about 3rd column says that 4-quadrant circle is either 0 or 9.
    Assume the 4-quadrant circle is 9.
    1) Top row **9 - *9T = *99 implies the filled triangle = 0. Also, *C9 - *90 = *99 imples the solid circle = 8.
    2) Bottom row: AAA - BBB = 888, so A = 9, B = 1, or A = 8, B = 0.
    3) Left column: x89 + 0xy = AAA. Since can at most carry the one once, and A is 8 or 9, x is 7 or 8 or 9. Since for any of those 3, the 10's position addition will definitely result in carrying a 1, A = x+1. Thus x is 7 or 8. A = 6-gon +1, 6-gon is 7 or 8.
    4) Look at column 1 again: x89 + 0xy = AAA. It's either 789+07y = 888, or 889 + 08y = 999. In the first case, 07y = 888-789 = 99.
    In the second case it's 08y = 999 - 889 = 110. In neither case can it work out.

    Therefore the 4-quadrant circle is 0.
    1) Top row: one's place: solid triangle = 0.
    2) Top row now reads: **0 - *00 = 000. Therefore filled circle = 0. And 6-gon = split-circle.
    3) Left column now reads: x00 + 0xx = AAA. So A = 6-gon = split-circle.
    4) Bottom row reads AAA - BBB = *0*, so A = B.
    5) From A = B and bottom row, right column now reads: 000 + y0* = 000. Thus y = split box = 0.
    6) Middle column now reads: B00 - 0BB = BBB. Thus B = 0.
    With that, everything is 0.
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  9. #9
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    Re: Zahlenspiel

    Quote Originally Posted by johnsomeone View Post
    Are you sure there's a solution? I still get that it's impossible, even correcting for that trick. It's certainly possible I made a mistake somewhere. Do you have an actual solution?

    Same rationale about 3rd column says that 4-quadrant circle is either 0 or 9.
    Assume the 4-quadrant circle is 9.
    1) Top row **9 - *9T = *99 implies the filled triangle = 0. Also, *C9 - *90 = *99 imples the solid circle = 8.
    2) Bottom row: AAA - BBB = 888, so A = 9, B = 1, or A = 8, B = 0.
    3) Left column: x89 + 0xy = AAA. Since can at most carry the one once, and A is 8 or 9, x is 7 or 8 or 9. Since for any of those 3, the 10's position addition will definitely result in carrying a 1, A = x+1. Thus x is 7 or 8. A = 6-gon +1, 6-gon is 7 or 8.
    4) Look at column 1 again: x89 + 0xy = AAA. It's either 789+07y = 888, or 889 + 08y = 999. In the first case, 07y = 888-789 = 99.
    In the second case it's 08y = 999 - 889 = 110. In neither case can it work out.

    Therefore the 4-quadrant circle is 0.
    1) Top row: one's place: solid triangle = 0.
    2) Top row now reads: **0 - *00 = 000. Therefore filled circle = 0. And 6-gon = split-circle.
    3) Left column now reads: x00 + 0xx = AAA. So A = 6-gon = split-circle.
    4) Bottom row reads AAA - BBB = *0*, so A = B.
    5) From A = B and bottom row, right column now reads: 000 + y0* = 000. Thus y = split box = 0.
    6) Middle column now reads: B00 - 0BB = BBB. Thus B = 0.
    With that, everything is 0.
    No, i dont have an actual solution. But im assured that each symbol represents a unique digit from 0-9. The answers to AAA and BBB are 3 digit answers and not a single digit.
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  10. #10
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    Re: Zahlenspiel

    Yes, I understand that AAA is a 3 digit number.
    I've produced a solution - unless you can find an error in my reasoning (which is certanly possible, given how convoluted the problem is). The only solution is that everything in sight is the digit 0.
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