Jambmaths question:
If X10 = 12145, find X
Option A:
184
Option B:
180
Option C:
124
Option D:
121
Jamb Maths Solution:
$\begin{align} & {{X}_{10}}={{1214}_{5}} \\ & \text{Convert 121}{{\text{4}}_{5}}\text{ to decimal system} \\ & {{1214}_{5}}=1\times {{5}^{3}}+2\times {{5}^{2}}+1\times {{5}^{1}}+4\times {{5}^{0}} \\ & {{1214}_{5}}=125+50+5+4 \\ & {{X}_{10}}={{184}_{10}} \\ & X=184 \\\end{align}$
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