This is a resources post about my 2022 MathsJam talk, Two Puzzles.

Puzzle statements

(1). For what values of $n$ can $n$ one-ohm resistors be arranged to have an equivalent resistance of one ohm?

(No funny business: current must pass through each of the resistors.)

(2) For what values of $n$ can a square be divided into $n$ smaller squares?

(No funny business: squares must have positive side length, not overlap and leave no spaces.)

Background material

Another spoiler