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]: Divorce affects one out of every ____ marriages today.
[A]: four


[Q]: Maps are ____ dimensional representations of the earth's surface.
[A]: two


[Q]: Ants are social insects, and most colonies contain ____ castes - queens, males, and workers.
[A]:
three