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]: Weight is proportionate to body volume, measured in ____ dimensions.
[A]: three


[Q]: Scientists divide the mosses into ____ groups .
[A]: eight


[Q]: Primitive crinoids have ____ circlets.
[A]:
four