In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Q: Roaches have two forewings and _ hind wings.

A: two
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Q: Most women experience a menstrual period _ to six weeks after a miscarriage.

A: four
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Q: Today there are _ non-Euclidean geometries of particular interest to students of mathematics.

A:
three
****