Kindaichi Shonen no Jikenbo - Shin Series - Vol. 9 Ch. 67 - Black Magic Murder Case 6

[MangaDex]

 

[Wabewalker]

The trick used to invert the carpet had previously been mentioned in Martin Gardner's "Mathematical Games" column in Scientific American April, May 1972; the columns were reprinted in _Wheels, Life, and Other Mathematical Amusements.

 

[LifeTheUnchosenOne]

The trick used to invert the carpet had previously been mentioned in Martin Gardner's "Mathematical Games" column in Scientific American April, May 1972; the columns were reprinted in _Wheels, Life, and Other Mathematical Amusements.

That's very interesting, I wasn't aware of that!