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Curious numbers

Curious numbers

Ask a person their favorite number from 1 to 9. Now multiply this number by nine and by the number 12345679,

Do you know what the result will be?

Solution

The result will be the initial number repeated nine times:

12345679 x 9 x 1 = 111111111
12345679 x 9 x 2 = 222222222
12345679 x 9 x 3 = 333333333
12345679 x 9 x 4 = 444444444
12345679 x 9 x 5 = 555555555
12345679 x 9 x 6 = 666666666
12345679 x 9 x 7 = 777777777
12345679 x 9 x 8 = 888888888
12345679 x 9 x 9 = 999999999