Mock Test

Exam: RRB NTPC Subject: Quantitative Aptitude Topic: Percentage

Total Questions: 20

Q1. The radius of a cylindrical can is decreased by 10%, while its height is increased by 20%. What is the percentage change in its volume?

8% increase 8% decrease 9.2% increase 9.2% decrease
Q2. What percentage of 5 kg is 200 grams?

2% 4% 5% 10%
Q3. Two villages A and B have populations in the ratio 4:5. If the population of village A increases by 20% and the population of village B increases by 30%, what is the new ratio of their populations?

4:5 24:32.5 4.8:6.5 12:16.25
Q4. The price of a bicycle is reduced by 10%. To restore the original price, by what percentage must the new price be increased?

10% 11.11% 12.5% 15%
Q5. A shopkeeper sells a shirt for Rs. 450, making a profit of 25%. What is the cost price of the shirt?

Rs. 350 Rs. 360 Rs. 375 Rs. 400
Q6. A country's budget deficit is ₹50,000 crore, which is 3% of its GDP. What is the total GDP of the country?

₹1,50,000 crore ₹1,66,667 crore ₹1,75,000 crore ₹2,00,000 crore
Q7. A candidate who gets 20% of the votes polled fails by 50 votes. Another candidate who gets 30% of the votes polled wins by 30 votes. What is the total number of votes polled?

5000 5500 6000 6500
Q8. If a salary of 2000 is increased by 5%, what is the new salary?

2100 2200 2300 2400
Q9. What is 20% of 150?

15 20 30 50
Q10. If a number is increased by 20% and then decreased by 10%, the net effect is an increase of what percentage?

8% 10% 12% 15%
Q11. A person invests Rs. 12000 in a scheme. After 2 years, the amount becomes Rs. 14520. What is the rate of compound interest per annum?

10% 12% 15% 18%
Q12. What is 5% as a decimal?

0.05 0.5 5.0 50.0
Q13. If a salary of Rs. 30,000 is reduced by 10%, what is the new salary?

Rs. 27,000 Rs. 28,000 Rs. 29,000 Rs. 26,000
Q14. A network bandwidth is 100 Mbps. If 40% of the bandwidth is used for streaming video and 25% of the remaining bandwidth is used for file transfers, what is the percentage of the total bandwidth used for file transfers?

15% 20% 25% 30%
Q15. A certain sum of money becomes Rs. 13310 in 3 years when compounded annually. If the rate of interest is 10%, what is the principal amount?

Rs. 10000 Rs. 11000 Rs. 12000 Rs. 12500
Q16. In a partnership, Ajay and Vijay invest Rs. 12,000 and Rs. 18,000. If the total profit is Rs. 9,000, what is Vijay's share?

3000 4500 5400 6000
Q17. A train travelling at 60 kmph crosses a platform in 20 seconds. If the length of the platform is 120 meters, the length of the train is:

180 meters 200 meters 220 meters 240 meters
Q18. The difference between the compound interest and the simple interest on a certain sum of money for 2 years at 8% per annum is Rs. 192. What is the sum?

Rs. 30000 Rs. 35000 Rs. 37500 Rs. 40000
Q19. If 40% of a number is subtracted from the number itself, the result is 30. The number is:

40 50 60 70
Q20. A man sells a chair at a profit of 25%. If he had bought it at 20% less and sold it for Rs. 5 less, he would have gained 30%. Find the cost price of the chair.

Rs. 100 Rs. 125 Rs. 150 Rs. 200

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