I really enjoyed this one due to my electrical background and knowing some of the actual functions helps to figure out the rules in this set

What are some of the best tools you recommend for beginners in ethical hacking, and why?

Did you make sure that all of the symbols do what you think they do?

Check that your definitions all line up with the top half of the diagram.

Magenta: adds 1 to a letter

Purple: flips a letter to the other side of the alphabet -- A to Z, B to Y, C to X etc.

Yellow: subtracts the side input letter from the main input letter

Blue: subtracts 1 from a letter

Green: adds two letters

Hope this helps.

I...don't get it. I have solved all 3 hints, and I understand the entire concept. But my 10 letter word simply does not exist in any alphabet.

I believe purple reflects the letter to the other side of the alphabet, turning A to Z, B to Y, C to X, and so on. Everything else I think is right. Good luck!

I need someone to tell me if I got this wrong I thought I decoded the symbols, but when I do the math it doesn’t come out right. I thought: pink was +1, blue was -1, purple was either +/- 3, green was add the two values, and yellow was subtract the two values. Originally this checks out, but when I apply it on the second part, it comes out with many random letters

This one may be my favourite - a contender with 8-Bit. Suitably difficult, but solvable with perseverance rather than with hints or specialized knowledge. Although I will say that the ones where I’m researching and learning about different encryption methods are always a fun exercise!

Darn, had to read hint to figure out the purple triangle. I was way off, I thought it was +-3 letters depending on something I hadn't figured out yet.

This one was easier than the previous 6 Theorems for me. I like this style of puzzle. The tricky part was finding the purple, which made my answer weird. Once I figured it out, it made it very easy

This is a great puzzle.

In general, easy or hard might depend on your background, or just what paths you tried yourself.

I don't mind using hints if I have no idea how to proceed, but it's nice to try and solve it yourself.

I love this puzzle

Knowing a bit about circuitry and being a political science major, once I got the first letter (R), I knew. Very clever M, very clever indeed.

Okay, I see what the purple inverter does. Explains why the binary solution only works in one spot by coincidence.

I find that whether these puzzles are easy or hard must be highly subjective. Some of the easier I have a heck of a time figuring out what M's train of thought is, some of these harder ones, I can see it almost immediately. I must say, I am still trying to figure out exactly how the purple symbol works. It seems to fit the binary thing, at times, but its function doesn't seem to be as simple as the other symbols. I'll keep working on that. But I didn't need it work out the answer in a trice. I _like_ this kind of puzzle!

And, like ReverendTed, I appreciate when I don't have to resort to a hint. It's so much more satisfying.

I think this was my favorite puzzle.

BTW: zero hints.

You can’t easily google the yellow boxes. They’re all made out of ticky tacky. Use mental induction to figure them out.