TwinTurbo.NET: Nissan 300ZX forum - It all adds up to numbers divisable by 9
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Subject It all adds up to numbers divisable by 9
     
Posted by DJPurpose(Sacto,CA) on November 22, 2003 at 1:23 PM
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In Reply To Pretty Interesting Math Trick >>>> posted by aspendog on November 22, 2003 at 11:37 AM
     
Message I tried it a couple times and found the pattern. Here are a couple numbers I ended up with after the subtraction.

1980 (1+9+8=18)
702 (7+2+0=9)
3915 (9+3+1+5=18)

So if you give it all the numbers except the one you picked, and you don't pick a zero, then its simple. Lets say on the first one you picked the "1" you would give the computer 8 and 9 then it would figure out what number would make an answer divisible by 9 with no remainder. ie. (18/9). so it adds 8+9 to get 17 and figures out that 1 would make it divisable by 9 with no remainder.


     
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