Clue

Perippa,
This need a lot of googling

Akila's poser

Akila,
I went up to 'uranus'. When the next step did not suggest itself, I stopped. Shall get back to it some time.

Jayaraman

Try this when you have time

This is very good. Not sure if I sent this as a mail.
http://www.freestuffhotdeals.com/hacker/1.html
Takes atleast half an hour to resolve. But a good one to set us thinking

Akila's puzzle

I don't have the answer yet. But let us all think for a while, Akila. Don't be in a hurry to tell us the answer!