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Meaning of open problem | Babel Free

Noun CEFR B2

Definitions

A problem that has been posed in a field of study such as mathematics or theoretical computer science, but whose answer is not yet known.

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

open proxy open proxy server open question open rate open razor open reading frame