(In reply to
answer by K Sengupta)
At the outset, the problem title suggests that the parity of a given digit in the code may be connected with the solution.
Accordingly, we substitute a "#" symbol for each even digit (including 0) and place an underscore (_) symbol for every odd digit to obtain the following structure.
#___#__##__###_#__#
##_##_#__#__#__#__#
#_#_#_####_ #__####
#___#_#__#__#__#__ #
#___#_#__#__#__#__ #
It is now observed that the "#" symbols in the above figure describe the word "MATH".
Consequently, the required secret message is "MATH".
Edited on February 7, 2009, 4:58 pm
Puzzle Solution
