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: Many prosimians have at least _ nipples and produce litters rather than a single offspring.

A: four
****
Q: People often have to wait between three and _ years for an organ especially for a liver.

A:
five
****