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# Do you love Riddles?

Today I solved a riddle first time and I feel so happy about it. I solved the bonus riddle in this video by Ted Ed, Can you solve the rebel supplies riddle? - Alex Gendler.

Do you have links to other sites that have similar riddles? Ted-Ed suggests Brilliant but that requires a membership which I don't have money for.

You may be interested in this tildes post.

404is404 is a pretty damn hard set of riddles I can't even get past the first one.

If you get any leads man I would apriciate a tip off. I got to thinking it had something to do with that fox pangram but could not get any further.

this is so much fun! I'm on level 8 so far. Thanks for posting this.

edit: welp, I finished. I cheated on 17 --- and even with the answer, I still don't know.

edit edit: scratch that! that's clever.

Yeah, I read that. notpron.com is similar, I am not looking for riddles like these.

I didn't even clear level one of 404is404 :/ Do you know of such similar series or channels which posts short riddles? Playlist like this one. I actually don't know how to describe it :|

I recently found out about a podcast, Hey Riddle Riddle which could be what your looking for. The hosts go over some riddles and try to solve them on the spot with the usual hijinks and silliness.

Does brilliant have a trial? That might be enough to scratch that itch. Othersie you can probably find a few riddle books at your local library.

I've been looking for riddles similar to notpron for a long time. Thanks for that link!

If you like mathematical riddles, every Friday the 538 blog of Nate Silver et al. publish a couple riddles.

The Riddler

Credit to Oliver Roeder who is the one to actually publish the riddles

Those are lots of fun and you can solve most of them with a trick or bruteforce them, so even when you don't find the trick you don't feel terrible for not solving them.

IBM Research in Switzerland also posts challenges monthly (but a bit tougher) and you can try the Putnam archive problems, but those can be a bit tedious sometimes (but also really interesting other times).

OP: If you like coding, check out wargames and CTF ! (I really am having fun with https://microcorruption.com/ ).

I was confused as to how the "riddle" was even a riddle and I assumed I was missing something, but apparently if/then statements are confusing enough to people to qualify as a riddle?

The bonus one is more interesting.

The two leading mathematicians in the kingdom, Alice and Bob, have run afoul of their tyrannical king. Rather than behead them outright, the king decides to prolong their misery by locking them in separate dungeons, so that any communication between them is impossible.

Each morning, a guard is to enter the corresponding dungeon and toss a coin so that the prisoner in that dungeon can see the outcome. Then the prisoner will be asked to guess the outcome of the coin toss in the other dungeon (i.e., Alice has to guess the outcome of the toss witnessed by Bob, and Bob has to guess the outcome of the toss witnessed by Alice). If at least one of the two prisoners guesses correctly, they will live to see another day. Otherwise they will be put to death forthwith.

It would seem that the mathematicians are doomed. But as they are being led away in chains Alice and Bob manage to confer for a brief moment and they agree on a strategy that will delay their execution indefinitely. What is the strategy?

Hover this link to see the CORRECT answer (I'm pretty sure at least)

Whole comment is a SPOILER responding to @wise's answer...

So if Alice's coin lands on heads, she tells the guard her guess for Bob's toss is "tails" because she's the designated opposite-teller.

If Bob's coin lands on tails, they both live because Alice's guess was right.

On the other hand, if Bob's coin lands on heads, he guesses "heads" because he's the designated same-teller. And they both live because Bob's guess was right.

Brilliant. I feel like I've been tricked into doing boolean arithmetic. I should've seen it coming!

Correct :]

Hover this link to see my guess

Hover this link to see another guess

Hover this link to see a third guess

Hover this link to see a fourth guess

Borrowing @talklittle's spoiler indicator until we have an official tag... Hover this link to see my guess