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: Earth is the third planet from the Sun in our solar system, which includes ____ other planets.

A: seven
****
Q: Photons have no mass and ____ electrical charge.

A: no
****
Q: Children can drown in less than ____ inches of water.

A:
two
****