Subject: General Aptitude · Chapter: Problems on Numbers · Exam: · Marks: · Difficulty:
What is the three-digit number? (Bank P.O., 2008) I. Two-fifth of that number is less than half of that number by 20. II. One-fourth of that number is 25% of that number.
Answer
SELF-PRACTICE — the source book printed no answer.
Nothing is invented here, so this question has no answer on record.
Explanation
Let the required number be $x$. I. $\frac{x}{2}-\frac{2x}{5}=20 \Leftrightarrow \frac{5x-4x}{10}=20 \Leftrightarrow \frac{x}{10}=20 \Leftrightarrow x=200$. II. $\frac{x}{4}=25\%$ of $x \Leftrightarrow \frac{x}{4}=\frac{x}{4}$. Thus, I alone gives the answer. ∴ The correct answer is (a).
Explanation as extracted from the printed page; notation may be imperfect.