Jambmaths question:
Evaluate $\frac{{{27}^{\tfrac{1}{3}}}-{{8}^{\tfrac{2}{3}}}}{{{16}^{\tfrac{2}{4}}}\times 2}$
Option A:
$\tfrac{23}{5}$
Option B:
$-\tfrac{23}{5}$
Option C:
$-\tfrac{23}{8}$
Option D:
$\tfrac{21}{7}$
Jamb Maths Solution:
$\frac{{{27}^{\tfrac{1}{3}}}-{{8}^{\tfrac{2}{3}}}}{{{16}^{\tfrac{2}{4}}}\times 2}=\frac{{{({{3}^{3}})}^{\tfrac{1}{3}}}-{{({{2}^{3}})}^{\tfrac{2}{3}}}}{{{({{2}^{4}})}^{\tfrac{2}{4}}}\times 2}=\frac{3-{{2}^{2}}}{{{2}^{2}}\times 2}=-\frac{1}{8}$
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