Jambmaths question:
Without using tables evaluate ${{(343)}^{\tfrac{1}{2}}}\times {{(0.14)}^{-1}}\times {{(25)}^{-\tfrac{1}{2}}}$
Option A:
10
Option B:
12
Option C:
8
Option D:
7
Jamb Maths Solution:
$\begin{align} & {{(343)}^{\tfrac{1}{2}}}\times {{(0.14)}^{-1}}\times {{(25)}^{-\tfrac{1}{2}}}={{({{7}^{3}})}^{\tfrac{1}{3}}}\times {{(\tfrac{14}{100})}^{-1}}\times \tfrac{1}{{{({{5}^{2}})}^{-\tfrac{1}{2}}}} \\ & =\times \tfrac{}{{{}^{2}}}\times \tfrac{1}{} \\ & =\frac{20}{2}=10 \end{align}$
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