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Math Help - can you help me find the missing number combination?

  1. #1
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    can you help me find the missing number combination?

    example: if i have 999 number combinations but im missing the 1000th number combo, how can i find the combo? is there some software that allows me too do this, im trying to find a number generator but in reverse!. like if you go on number generator sites they say put in your numbers e.g 1,2,3,15,20 then they give you a list of combinations but i want to go on a website/software and put in the list of combinations from the numbers (1,2,3,15,20) and then let the software come back and say your missing combo.. 15,2,1,20,3 etc

    so if anyone knows any software that is capable of performing these actions?
    or maybe links too some websites that has what im looking for, thanks.
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  2. #2
    MHF Contributor ebaines's Avatar
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    Re: can you help me find the missing number combination?

    Dan - you're going to have to be a bit clearer about what you're looking for. It seems that you have a web site that if you input a series of numbers it produces all possible arrangements, right? For example if you input 1, 2, and 10 it woud give the 6 possible arrangements of these three numbers (1-2-10, 1-10-2, 2-1-10, 2-10-1, 10-1-2, and 10-2-1) So is your question if given 5 of these 6 arrangemenst how to determine what the missing arrangement is?
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  3. #3
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    Re: can you help me find the missing number combination?

    Quote Originally Posted by ebaines View Post
    Dan - you're going to have to be a bit clearer about what you're looking for. It seems that you have a web site that if you input a series of numbers it produces all possible arrangements, right? For example if you input 1, 2, and 10 it woud give the 6 possible arrangements of these three numbers (1-2-10, 1-10-2, 2-1-10, 2-10-1, 10-1-2, and 10-2-1) So is your question if given 5 of these 6 arrangemenst how to determine what the missing arrangement is?
    yes you are correct but on a much bigger scale and sorry if i didn't explain my question well enough, basically its like the lottery!, I have 77,000 number combinations in my excel from a total of 20 different numbers, each line of an combination has 7 numbers.

    i know that there's a total of 77,520 different combo's and ive already got 77,000, so im left trying too find the last '520' combinations

    but my problem is i haven't got a software that allows me to go and enter my 77,000 number combo's from the list of 20 numbers.
    so i need a software that calculates which combo's im missing from my list.

    is there any software out there that can perform this action? or maybe i could do a calculation on excel that would allow me to perform this action? or maybe there's websites that you might know of which have the software im after.
    hope i made my question easier too understand, thank you.
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