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

Q: Cockroaches require food every _ to ten days but mut take in water every ten days.

A: seven
****
Q: Comets are a bit like giant dirty ice-balls with diameters between _ and fifty kilometres.

A: five
****
Q: Cats have _ eyelids.

A:
three
****