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

Q: Presta valves are the skinnier of the _ valve types.

A: two
****
Q: Monarch caterpillars have _ pairs of tentacles.

A: two
****
Q: Women are three-fifths of all poor adults, and _ in eight women are poor.

A:
one
****