Subject: General Aptitude · Chapter: Problems on Numbers · Exam: · Marks: · Difficulty:
The difference of two numbers is 20\% of the larger number. If the smaller number is 12, the larger one is
(a)15
(b)16
(c)18
(d)20
Answer
Answer (as printed):
Explanation
Let the number be $x$. Then, $x-12=20 \%$ of $x \Leftrightarrow x-\frac{x}{5}=12$ $$\Leftrightarrow \frac{4 x}{5}=12 \Leftrightarrow x=\left(\frac{12 \times 5}{4}\right)=15 .$$
Explanation as extracted from the printed page; notation may be imperfect.