Percentage (Railway Maths) (Part – V)

Total Questions: 50

1. If 15% of (x - y) = 9% of (x + y), then y is what percentage of x? [RRB NTPC 11/03/2021 (Evening) ]

Correct Answer: (a) 25%
Solution:

2. Two numbers are respectively 30% and 80% more than a third number. These two numbers are in the ratio of. [RRB NTPC 12/03/2021 (Morning) ]

Correct Answer: (b) 13 : 18
Solution:

Let the 3rd number = 100
1st number = 130
2nd number = 180
Ratio = 130 : 180
= 13 : 18

3. If A is 125% of B, then B is what percentage of (A - B) ? [RRB NTPC 12/03/2021 (Morning) ]

Correct Answer: (d) 400%
Solution:

4. Find the approximate percentage of aggregate marks scored by Ramesh, who obtained 50%, 60% and 70% marks in three examinations with maximum marks 100, 130 and 150 respectively. [RRB NTPC 12/03/2021 (Evening)]

Correct Answer: (a) 61.32
Solution:

5. In a town, the population increased from 1,85,500 to 2,22,600 in a decade. The average percentage increase of population per year is: [RRB NTPC 13/03/2021 (Morning)]

Correct Answer: (d) 2%
Solution:

6. Ravi’s salary is 20% more than Mohan’s salary. If Mohan’s salary is Rs. 1,600 then Ravi’s salary will be: [RRB NTPC 13/03/2021 (Evening)]

Correct Answer: (b) 1,920
Solution:

Ravi’s salary = 1,600 × 120/100 = 1,920

7. The sum of the salaries of A and B together is Rs. 4300. A spends 95% of his salary and B, 80% of his salary. If their savings are the same, what is A’s salary? [RRB NTPC 14/03/2021 (Morning)]

Correct Answer: (a) 3440
Solution:

8. In a class, the ratio of girls and boys is 13 : 12. Find the percentage of the girls in the class. [RRB NTPC 14/03/2021 (Morning)]

Correct Answer: (b) 52%
Solution:

9. If the radius of a circle is reduced by 15%, then its area is reduced by. [RRB NTPC 14/03/2021 (Evening) ]

Correct Answer: (d) 27.75%
Solution:

10. 82% of the number is 738. What is 90% of that number? [RRB NTPC 15/03/2021 (Morning) ]

Correct Answer: (d) 810
Solution: