Level 1: Elevators, load balancing (1D arrays)

Level 2: Traffic lights, graphics (2D arrays)

Level 3: Flight control, simulations (3D arrays)

Level 4: Satellite tracking, virtual worlds (4D arrays)

...

So many problems can be cast to arrays to be solved with various linear algebra.

Considering LLMs are "Level 1000+" puzzles in this analogy, I wonder if every problem could be represented by an n-dimensional vector and solvable with algebra.

They at least make great interview questions - Tic-Tac-Toe is commonly given, but is obvious. The board already "looks" like arrays. The less obvious ones, like elevators (or load balancing), are always interesting.