NIELIT 2016 DEC Scientist B - Section A: 47

Question

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

• A. $115$
• B. $95$
• C. $105$
• D. $125$

Answer 1

Assume that number is $x.$

Now according to the question

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

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

$\Rightarrow 4x = 84 \times 5$

$\Rightarrow x = 21 \times 5$

$\Rightarrow x= 105$

$\textrm{Option C}$