What is the number of significant digits for a number that does not represent a measurement?

For the four sets of three measured physical quantities as given below,which of the following options is correct?
$(i)$ $A_{1}=24.36, B_{1}=0.0724, C_{1}=256.2$
$(ii)$ $A_{2}=24.44, B_{2}=16.082, C_{2}=240.2$
$(iii)$ $A_{3}=25.2, B_{3}=19.2812, C_{3}=236.183$
$(iv)$ $A_{4}=25, B_{4}=236.191, C_{4}=19.5$

What is the value of the number $96378$ when rounded off to two significant figures?

If the side length of a cube is $7.203 \ m$,then its volume is ............ $m^3$.

If $97.52$ is divided by $2.54$,the correct result in terms of significant figures is

The area of a square is $5.29\ cm^2$. The area of $7$ such squares taking into account the significant figures is ........... $cm^2$.