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This question checks the students knowledge of significant figures

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Concise rules (See: https://en.wikipedia.org/wiki/Significant_figures)

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In a number with or without a decimal point, trailing zeros (those to the right of the last non-zero digit) are significant if they are justified by the precision of their derivation: 389,000; 2.02000; 5.400; 57.5400.

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More information through additional graphical symbols or explicit information on errors is needed to clarify the significance or importance of trailing ze

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Helpful Link: http://www.youtube.com/watch?v=8Nrq0VZ9lIc

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How many significant figures in the following quantity {number}?

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