讀心卡 | 適合所有年齡的簡單數學魔術

Bought this for my nephew's birthday and we ended up playing with it all afternoon. The math behind each card is simple enough that he figured out the trick himself by day two, which made him feel like a genius.

I was skeptical about a "mind reading" trick, but the math behind these cards genuinely works every time. I've stumped my coworkers three days in a row now, and the little instruction sheet made it easy to learn in about ten minutes.

Brought these to a family dinner and my uncle genuinely couldn't figure out how I was guessing his number every time. The cards are sturdy and fit in my pocket, so I've been carrying them around to mess with coworkers. Simple enough that my 9-year-old niece picked up the trick in about five minutes.