Which prefix represents the number two?

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Multiple Choice

Which prefix represents the number two?

Explanation:
Two is conveyed with the prefix bi-, a combining form that means two. It’s used across many words to indicate two of something, such as bicycle (two wheels), bilateral (two sides), and bicuspid (two cusps). Other prefixes map to different counts: tri- for three, mono- or uni- for one, and tetra- or quadri- for four. So for the number two, bi- is the best-fitting prefix. (Note that di- also means two in some contexts, but bi- is the more general, widely used form.)

Two is conveyed with the prefix bi-, a combining form that means two. It’s used across many words to indicate two of something, such as bicycle (two wheels), bilateral (two sides), and bicuspid (two cusps). Other prefixes map to different counts: tri- for three, mono- or uni- for one, and tetra- or quadri- for four. So for the number two, bi- is the best-fitting prefix. (Note that di- also means two in some contexts, but bi- is the more general, widely used form.)

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