What would I do without a scientific calculator? At least it was a quick one so I can get on with revising for my finals!!! Steve Brumpton

Never too confident with my answers to RC's of the type required for RC1 but the event has great potential - many thanks for the entertainment so far. Dave Bell

Refreshingly simple (assuming I got it right!) after RC2, which I couldn't work out at all until I got the end from RC3. Jeremy Rodgers

Yes, I got the route - I really think I got it! Brian Mead

Still don't know where you are coming from (or where I am supposed to be going to) on RC2, but now I am back - or should I wait to see my score for this one before saying too much? Chris Henley

Getting harder. Pete James

Slightly fooled by the grid line nos till it dawned on me it was binary/hex or computer orientated then the sailing was a little easier though variable digit nos led to a couple of problems! Keep it up, it's a challenge doing it in a short space of time with only one lot to solve! An end ode may prove difficult! I'll keep thinking. Carol Moulton

With a little help from Compton's Interactive Encyclopaedia (which told me what they are) I am now the proud owner of a self-compiled table of all binary numbers between 1 and 850. Any offers???? Tony Hesp

Not too sure about the answer to Q1 - does crossing from white over yellow to white at a WYYW x-roads count as joining from a yellow to a white? [Yes it does, "Crow"] Steve Turnbull

Good fun! Signed, R2D2 Catherine Doherty

Starting to get quite into it! Clive George

Good one to start with! Ian Buxton

Unfortunately I do not have a Scientific Calculator, nevertheless I was Ok until "then" - then I got hung up with bytes finally I made the flexible least significant bit. Gosh this is fun but my work is suffering! Thanks for the challenge. Brian Banks

After working out the binary it wasn't too bad - at least I had some idea what I was supposed to do, unlike RC2 where I didn't have a clue. Matthew Atkinson

Wasn't doing to badly until "THEN" when my limited knowledge of binary numbers ran out,so I had an educated guess at some of the answers. When I was at school they taught you that one and one equalls two...NOT THREE Dave Keetley