It depends on the sentence. For example:
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Because it's the only one with only two factors.
There are two syllables in only.
The word only *is* an adverb, as in "we were only slightly delayed." It can also be an adjective when used before a noun (e.g. the only way), and more rarely a conjunction (it is not that far, only it seems like a longer trip).
The answer will depend on what is known of the shape. If you know only the number of faces, or only the number of vertices, then you cannot work out the number of edges. If you only know the shapes of the faces you cannot.The answer will depend on what is known of the shape. If you know only the number of faces, or only the number of vertices, then you cannot work out the number of edges. If you only know the shapes of the faces you cannot.The answer will depend on what is known of the shape. If you know only the number of faces, or only the number of vertices, then you cannot work out the number of edges. If you only know the shapes of the faces you cannot.The answer will depend on what is known of the shape. If you know only the number of faces, or only the number of vertices, then you cannot work out the number of edges. If you only know the shapes of the faces you cannot.
All pyramids have only one base.All pyramids have only one base.All pyramids have only one base.All pyramids have only one base.