What a load of crap - I need a mixture of Hydroflouric and Hydrochloric acid to get rid of my sweat stains. 19/35 for me
Einstein once said: never memorise something you can't look up (referring I believe to things like his telephone number - as that was "available information").
So, if I need to sew some button, or cut some weird cake, I'll just ask my lady to look it up how (if she doesn't already know - and that's unlikely).
31/39 - thanks 7.62
Some guesses there, but snakes and lizards don't look like turtles etc, so a little common sense helps to get around 50/50 outcome on the unknowns.