Find six strictly increasing terms - consisting entirely of positive integers - in arithmetic sequence that use precisely three different digits.

*** The highest term is less than 1000.

1,6,11,16,21,26

2,7,12,17,22,27

+2  bonus answers for decreasing (d=-5), inverse order

Edited on June 26, 2014, 2:19 pm

Posted by Ady TZIDON on 2014-06-26 14:16:45