https://www.musical-u.com/learn/the-magic-number-and-how-to-use-it-to-learn-anything/
The best way to approach learning is to understand the brain processes involved. How does this relate to the “magic number”?
The magic number is all about the Working Memory and what it can easily hold. https://www.musical-u.com/learn/the-magic-number-and-how-to-use-it-to-learn-anything/