I would love a game where you learn to actually read QR codes by eyesight - and quickly. Would be quite fun to have an impressive and not very useful skill
Not sure if it's possible to be honest, it might be if you can sit down with a pen a paper. But again we've seen human perform seemingly impossible tasks before, so who knows.
I've always wanted to see someone encode/decode Base64 in their head.
At best, I've learned to recognize a base64 string that begins with "eyJ" is likely JSON.
Also, if you asked me what the base64 encoding of "password" is, but if you showed me "cGFzc3dvcmQ=" and asked me what the decoded value is, I'd recognize it as "password". Though you could probably change a few digits and fool me.
