Question 3

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Jambmaths question: 

Evaluate $\frac{2.813\times {{10}^{-3}}\times 1.063}{5.637\times {{10}^{-2}}}$reducing each number to two significant figures and leaving your answer in two significant figures

Option A: 

0.54

Option B: 

0.0054

Option C: 

0.055

Option D: 

0.056

Jamb Maths Solution: 

\[\begin{align}  & \frac{2.813\times {{10}^{-3}}\times 1.063}{5.637\times {{10}^{-2}}} \\ & \approx \frac{2.8\times {{10}^{-3}}\times 1.1}{5.6\times {{10}^{-2}}}\text{    }\!\!\{\!\!\text{ reducing each number 2s}\text{.f }\!\!\}\!\!\text{ } \\ & =0.55\times {{10}^{-1}} \\ & =0.055 \end{align}\]

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