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Q.

The result of which of the following has/have least significant figure(s)?

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a

$\frac{0.02856 \times 298.15 \times 0.112}{0.5785}$

b

$5 \times 5.364$

c

$0.0125 + 0.7864 + 0.0215$

d

All have same number of significant figures

answer is A.

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Detailed Solution

(a) In multiplication and division, the lease precise term 0.112 has 3 significant figures. Hence, the answer should not have more than three significant figures.

(b) In multiplication, 5 is the exact number and the other number has 4 significant figures. Hence, the answer should have 4 significant figures.

c) In addition the answer cannot have more digits to the decimal point than either of the original memebers. Hence, the answer should have 4 signficant figures.

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