# NIELIT 2016 DEC Scientist B - Section A: 47

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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. $125$

Assume that number is $x.$

Now according to the question

$\Rightarrow x-\dfrac{1}{5} x=84$

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

$\Rightarrow 4x = 84 \times 5$

$\Rightarrow x = 21 \times 5$

$\Rightarrow x= 105$

$\textrm{Option C}$

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