Percentage (Railway Maths) (Part – IV)

Total Questions: 50

1. Salim bought an article for Rs 784 which included GST of 12%. What was the price of article before GST was added? [RRB NTPC 30/01/2021 (Evening) ]

Correct Answer: (a) 700
Solution:

2. If 2 L of water is evaporated on boiling from 8 L of sugar solution containing 4% sugar, find the percentage of sugar in the remaining solution? [RRB NTPC 30/01/2021 (Evening) ]

Correct Answer: (b) 16/3 %
Solution:

3. A survey of 40 students showed that 25% children liked playing football. How many children did not like playing football? [RRB NTPC 30/01/2021 (Evening)]

Correct Answer: (b) 30
Solution:

4. Rahul had to appear for a test in four subjects. In the first three subjects the maximum marks were 50 each, in which Rahul secured 60% on an average. In the fourth subject Rahul scored 54 marks and his overall percentage rose to 64%. What were the maximum marks in the fourth subject? [RRB NTPC 31/01/2021 (Morning)]

Correct Answer: (c) 75
Solution:

5. The difference between 48% and 38% of a number is 354. What is 58% of that number? [RRB NTPC 31/01/2021 (Evening)]

Correct Answer: (d) 2053.2
Solution:

6. A vendor purchases an article for Rs. 500 and sells it for Rs. 550. What is the percentage gain? [RRB NTPC 02/02/2021 (Morning)]

Correct Answer: (b) 10%
Solution:

7. If the length of a rectangle is increased by 70%, what would be the percentage decrease (correct to the nearest integer) in the width to maintain the same area? [RRB NTPC 02/02/2021 (Evening)]

Correct Answer: (c) 41%
Solution:

8. In a given population, 20% of the population is affected with asthma out of which 90% of asthma patients used to work in flour mills. If 30% of the total population was working in flour mills, then what will be the percentage of the people working in flour mills who are suffering from asthma? [RRB NTPC 02/02/2021 (Evening) ]

Correct Answer: (a) 60%
Solution:

9. In an examination, 80% students passed in Physics, 70% students passed in Chemistry, while 15% failed in both the subjects. If 325 students passed in both the subjects, find the total number of students who appeared in the examination? [RRB NTPC 03/02/2021 (Morning)]

Correct Answer: (c) 500
Solution:

10. The price of mobile is first decreased by 20% and then increased by 10%. The net change in the price will be: [RRB NTPC 03/02/2021 (Morning)]

Correct Answer: (d) 12%
Solution: