Praise J.J.

Five years ago, I raised my IQ test score by 50-70 points with effort. I became arrogant and prideful; I would tell people that they’re illogical or factually incorrect. If I was so smart, why was I not top in class? neat? organised? friendly? or focused? After all, “the only...

Ask most people to multiply 97 × 96 in their head, and they’ll freeze. Ask someone who’s mastered mental math, and they’ll give you the answer in seconds: 9,312. Here’s what they did differently: They didn’t multiply 97 × 96 directly. They saw it as (100 - 3) × (100...