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- Thread starter yvon_la
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I think this is what you are asking:
3 digit number. Each digit can only be used once.
First digit can be any digit from 0-9, meaning there are 10 choices.
The second digit has only 9 choices since there cannot be a repeat of the 1st digit above.
The 3rd digit has only 8 choices since 2 of have already been used for the 1st and 2nd digit.
So, the total possible combination of digits is 10*9*8 = 720
There are 270 possible 3 digit number combinations that do not have a repeating digit.

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nonono! it isnt 0 to 9
call them say x y z if you must have a name .that is it , nothing else there is no number letter etc ! it can only be x or y or z or combination of those three . x is different then y and y is different then z etc etc
but that is it!

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If I understand correctly, the answer is 6
The first digit can be any one of three
The second digit can be any one of the remaining two
The last one is the remaining one
3 X 2 X 1 = 6
xyz
xzy
yxz
yzx
zxy
zyx
Edit: Oops, too slow...

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ok! i dont understand the last answer but i think you got the right of it !your first answer is the way i thing it works
why 6 how come not 9?( like a when you play tictactoc you got 9 case if you put one xyz on top and xyz vertically you get 9 result no?
i ask because i was expecting the total amount of different conbination of 3 different value to be 9 .
i reworded because you made me think of another condition. i dont think can be a non combination . i think it has to be a different combination
with this what would the answer be? sorry i am finding out i know very little about math and forgot there are a lot of things to mention i take for granted but i didnt specify sorry

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xyz
x123
y456
z789
so this would end up with 9 possibility right?

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On a tic tac toe board there are only two choices X and O but they can be reused, so there are 2 * 2 * 2 ways to fill out a line of 3, the answer is 8.
Now for filling out the whole board, you would have to look at the 2 ^ 9 (512) possible ways to fill a board and exclude all that don't have 5 X's and 4 O's (since X goes first he plays 5 turns and O plays 4, unless someone wins) Also you may want to exclude rotational variants of the same game.

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3*3*3=27 not 9.

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i am blank ! you provided me an angle that permitted me to view stuff from a different point of view but i dont know how tov fix it
basicly in the tic tac toe board there can be only a/a b/b c/c
but the thing i try to find work likely like this a/a/a b/b/b c/c/c
so tic tac toe board doesnt work there is only 2 side usable .are there game that use tree side ( like triangular? )
tytyty ! i am further from an answer then i was but you helped me a lot fixing one huge error i hadnt notice
i cant copy the original , i am doing the original!

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Originally Posted By: yvon_la

xyz
x123
y456
z789
so this would end up with 9 possibility right?

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