Question

Find a 8 digit number that if multiplied by the number 9 or any of its multiplications products (18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

Answer 1

The number is: 12345679

12345679 * 9 = 111111111

12345679 * 18 = 222222222

12345679 * 27 = 333333333

And so on...