A Maths Puzzle: Balls, Solution and The Chinese Remainder Theorem

From a channel Lumen includes in full: James Grime (singingbanana), a mathematician and maths communicator, explains number theory, cryptography (including the Enigma machine), probability and puzzles, with the reasoning written out.

A 5-minute video from singingbanana's catalogue; the title names its topic.

Video by singingbanana, played through YouTube's embedded player.