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

Q: Mature cysts have _ nuclei while the immature have two.

A: four
****
Q: Ticks mature in _ stages, moving from egg to larva and nymph to adult.

A: four
****
Q: African elephants have five toes on the front feet and _ on the back.

A:
three
****