Quote:

Originally Posted by **Matias** Did you know that 142.857 is a curious number?
142.857 x 2 = 285.714 ( same digits )
142.857 x 3 = 428.571 idem
142.857 x 4 = 571.428 idem
142.857 x 5 = 714.285 idem
142.857 x 6 = 857.142 idem __142.857 x 7 = 999.999__ !!!
142.857 x 8 = 1.142.856 (number missing is 7, but last -6- and first -1- add to 7
142.857 x 9 = 1.285.713 (number missing is 4, but last and first add to 4 )
You can go on and on... |

This one is the key to all that. Multiples of 9 produce a lot of odd number things.

Remember the way the whole 9 times table added up to 9?

9 x 1 = 09 ; 9 + 0 = 9

9 x 2 = 18 ; 1 + 8 = 9

9 x 3 = 27 ; 2 + 7 = 9

9 x 4 = 36 ; 3 + 6 = 9

9 x 5 = 45 ; 4 + 5 = 9

9 x 6 = 54 ; 5 + 4 = 9

9 x 7 = 63 ; 6 + 3 = 9

9 x 8 = 72 ; 7 + 2 = 9

9 x 9 = 81 ; 8 + 1 = 9

9 x 10 = 90 ; 9 + 0 = 9