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

[EX Q]: Human eye are only about _ times sharper than a jumping spider's.
[EX A]: five

[EX Q]: Some bird feeders have _ perches at all, but neither do tree trunks.
[EX A]: no

[EX Q]: Ostrichs only have two toes, and _ toenail.
[EX A]:
one