Which prefix means 'two'?

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Multiple Choice

Which prefix means 'two'?

Explanation:
The idea being tested is which prefix signals quantity, specifically two. The prefix that means two is bi-, coming from Latin bis meaning twice. It appears in words like bicycle (two wheels), binary (consisting of two parts), and biannual (occurring twice a year). The other prefixes don’t express two: semi- means half or partially, ante- means before, and post- means after. So bi- is the best fit for “two.”

The idea being tested is which prefix signals quantity, specifically two. The prefix that means two is bi-, coming from Latin bis meaning twice. It appears in words like bicycle (two wheels), binary (consisting of two parts), and biannual (occurring twice a year). The other prefixes don’t express two: semi- means half or partially, ante- means before, and post- means after. So bi- is the best fit for “two.”

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