Under TWO MINUTES! Justin Bieber's a long-time fan of the Rubik's Cube -- he even solved the puzzle live on Spanish-language TV back in 2009 AND on the James Corden's Carpool Karaoke back in '15.

Dude is genius level! He says he even does Sodoku which is like ... mentally HARD!


Meanwhile, it looks like wife Hailey Baldwin is forcing Biebs to return his beloved Drew House custom motocross bike. The motorcycle was loaded onto a truck, on Wednesday, and taken away. Unless maybe it just needed a tune-up?

And speaking of boys and their toys, Justin hit the DogPound gym yesterday and carried in his change of clothes, including his $1700 Off-White Jordans which he dropped on the street TWICE! Watch out for those suckers, JB! They're an investment!