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

Q: Quinces begin to bear a year or _ after planting.

A: two
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Q: Cockatiels average _ to five eggs per nest, with an egg typically laid every other day.

A: four
****
Q: Mollusks are the most numerous of the _ animals.

A:
four
****