Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

Q: Human gestation is divided into three trimesters of ____ months each.

A: three
****
Q: Potential energy is divided into ____ different types of energy.

A: three
****
Q: Fawns are weaned when three to ____ months old, and are sexually mature at about six months.

A:
four
****