# NIELIT 2016 MAR Scientist D: 71

1 vote
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A certain number when added to $50\%$ of itself is $27$. What is the number?

1. $7$
2. $9$
3. $11$
4. $18$

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Let's call the unknown number $X.$

$\textrm{X+(50%of X) = 27}$

$\implies \textrm{X+0.5X =27}$

$\implies\textrm{1.5X=27}$

$\implies\textrm{X=18}$

So $18$ is that number, option $D$ is correct.
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