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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Numbered compositions:

RARER: Like prime numbers as compared to composite numbers
OPUSES: Numbered compositions
OPUS: Numbered composition
FOUR: Smallest composite number
OPUS: Numbered musical composition
ONE: Number that's not composite or prime
ONE: Number that's neither prime nor composite