Exams › SSC CGL (Prelims) › General

If you subtract the square of a number from 3000 and then multiply the result by 14, you get 33250. What is that number?

1. 15
2. 45
3. 35
4. 25

Correct answer: 25

Solution

Let the number be $x$. Then $14(3000-x^2)=33250$, so $3000-x^2=2375$. Hence $x^2=625$ and $x=25$ (taking the positive value).

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