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

[Q]: Tapirs have hoofed toes, with four toes on the front feet and _ toes on the hind feet.
[A]: three


[Q]: Human beings have _ fingers.
[A]: ten


[Q]: Some homeopathic remedies are so dilute, _ molecules of the healing substance remain.
[A]:
no