What is a "peg" word, and how does a peg list let you memorize a long number?

A peg is a fixed, pre-memorized word for a number; you chunk a long number into pieces and link each peg's image into a story.

With a 00–99 peg list, every two-digit pair already has a ready image, so you don't have to invent words on the fly:

• To memorize 3, 1, 4, 1, 5 (π): split into 31 · 41 · 5 → meat · rat · owl → picture a slab of meat with a rat being chased by an owl.

Chunking into pairs and linking the vivid images into one absurd scene is far more reliable than rehearsing bare digits — that's the whole point of the double-digit peg mission in this module.