There should be 3.
It should have three.
2.6
There are four significant figures in 0.1111.
The number 30.4 has THREE significant figures.
It has 5 significant figures.
63.6615
192
It might have been possible to answer the question if the "following" multiplication had followed. But since you did not bother to make sure that it did, I cannot provide a more useful answer.
6 of them.
The answer depends on what operations were used. There should normally not be more significant figures in the answer than in any of the numbers used in the calculation.
4 significant figures.
4 significant figures.
5 significant figures.
No, three significant figures.
2 significant figures.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
To multiply with significant figures, multiply the numbers as usual and then round the answer to match the number of significant figures in the least precise number used in the calculation.