Reply To: Another Cool (or at least semi-cool) Magic Trick

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May 1, 2012 7:38 pm at 7:38 pm #871538
midwesterner
Participant

11*9=99; 9+9=18, 1+8=9

81*9=729, 7+2+9=18, 1+8=9

387*9=3483, 3+4+8+3=18, 1+8=9

And so it is with any whole number you can make up.

5555*9=49,995, 4+9+9+9+5=36, 3+6=9

123,456,789*9=1,111,111,101, 1+1+1+1+1+1+1+1+1=9

987,654,321*9=8,888,888,889, 8+8+8+8+8+8+8+8+8+9=81, 8+1=9