The fact that the ONLY way to determine the value of the symbols in the last line makes the latter interpretation the valid one.The interpretation that the position of the hands of the clock determines the numerical value of the clock is potentially correct. The interpretation that the number of clocks determines the numerical value of the clocks is also potentially correct. The rules of the mathematical system were not defined as being one or the other, therefore it is impossible to determine which answer necessarily must be correct.
Same with number of bananas vs. number of bunches & # of sides vs. # of geometric figures.