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If the difference between a number and $1/5$th of it is $84$, what is the number?

1. $115$
2. $95$
3. $105$
4. $125$
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$\textrm{Assume that number is x.Now according to the question}$

$\Rightarrow$ $x$$-$${\frac{1}{5}*x=84}$

$\Rightarrow$ $5x-x$ = $84*5$

$\Rightarrow$ $4x$ = $84*5$

$\Rightarrow$ $x$ = ${\frac{84*5}{4}}$

$\Rightarrow$ $x$= $105$

$\textrm{Option C}$
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