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]: Some prisons house up to ____ times their capacity.
[A]: seven


[Q]: Photons have no mass and ____ electrical charge.
[A]: no


[Q]: Insects are different from other arthropods because they have six legs and ____ body regions.
[A]:
three