I believed myself to be quite good at these. Even though I never broke any speed records, I must admit I was rarely stumped.
Laughed, I did, when I saw an 11% success rate. "This shall be a fair test of my logical mettle!"
I was ... ill-prepared for what followed, and was summarily humbled.
Any help, or even a few pointers in the right direction would be much appreciated. I've included up to where I was defeated. But after so many second-guesses, they may not even be right.