The Powerful Brains:
1. Spot the odd magic cube
2. “Drain man” Arithmetics
3. The mental Hanzi (汉字笔画) strokes
4. The ‘Breathing and Smelling’ (气息触觉) cognitive power of a blind.
I found (3) fantastic but the judge Dr. Wei disqualified her for being an “Asperger’s Syndrome” rather than a skill.