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  1. #1
    Uranium Lounger
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    Can anyone figure out how this is done ??? I can't see any mathmatical connection to the solution.

    http://www.regiftable.com/RegiftingRobinPopUp.html
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  2. #2
    Lounger
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    There are a limited number of possible answers on the board. If you said 83, then 83-8-3=72. 99-9-9=81. Both of these answers and the rest all have the same answer on the board. The possible answers are :<span title="Spoiler: Highlight to reveal" style='color:#000000;background:#000000;padding:0p x 0.2em;'>[color=#666;margin-right: 0.2em]SPOILER:[/color] 81,72,63,54,45,36,27,18,9 </span>

    The logic is that since we are starting with a 2 digit number, subtracting the 1 spot number brings you to the rounded to 10 spot and then subtracting the 10 spot number brings you down to the 1 spot. I know, lousy explaination, but there you go.
    ...

  3. #3
    Platinum Lounger
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    [quote name='DocWatson' post='773926' date='07-May-2009 00:24']Can anyone figure out how this is done ??? I can't see any mathmatical connection to the solution.

    http://www.regiftable.com/RegiftingRobinPopUp.html[/quote]

    Any 2 digit number can be represented as 10A + B where A is 1 -> 9 and B is 0 -> 9.
    If you subtract both digits from this, you always end up with a multiple of 9:

    10A + B - A - B = 9A

    You'll note that all the prizes for multiples of 9 are the same! Not so "gifted" after all!

    Alan

  4. #4
    Uranium Lounger
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    Thanks guys !!!

    One can always count on the Lounge Brain Trust when an intelligent solution is required.
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  5. #5
    5 Star Lounger Ruff_Hi's Avatar
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    Well, it didn't get some of my numbers correct - but that was mainly because I got my maths wrong <hangs head in shame>
    (Location Australia, then UK, but now USA. Heart, outlook, attitude, etc always Australian)
    Quote: "All Happiness is the release of internal pressure"

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