Numbers are the hardest thing to memorize, because they’re pure abstraction: no shape, no story, nothing to picture. The fix, used by nearly every memory champion alive, is called the phonetic (or Major) system: it assigns a consonant sound to each digit 0-9. Vowels don’t count, so you have huge freedom to build real words.
- 0 = S/Z sound (zero starts with a Z-ish sound)
- 1 = T/D (a lowercase t has one downstroke)
- 2 = N (n has two downstrokes)
- 3 = M (m has three downstrokes)
- 4 = R (“four” ends in R)
- 5 = L (L is the Roman numeral for 50)
- 6 = J/SH/CH (a cursive j curves like a 6)
- 7 = K/G (hard) (a K is made of two 7s back to back)
- 8 = F/V (a cursive f has two loops like an 8)
- 9 = P/B (a P is a mirrored 9)
Any digit string turns into consonant sounds, and you fill in vowels freely to make a real word. 51 is L-T, so “lot”. 74 is K-R, so “car”. Drill the ten sounds until you don’t have to think about them, they’re the foundation for everything in the next two days.