Railway RRB NTPC Undergraduate Level Math Practice Set-4: The Railway Recruitment Board (RRB) Non-Technical Popular Categories (NTPC) exam is a highly competitive exam conducted to recruit candidates for various non-technical posts in the Indian Railways. The exam consists of multiple sections, including Mathematics, General Intelligence and Reasoning, General Awareness, and more. For the Undergraduate Level, the Mathematics section tests the candidate’s basic mathematical skills and problem-solving abilities.
Below is a Practice Set-4 for the RRB NTPC Undergraduate Level Mathematics section. This set includes a variety of questions to help you prepare for the Computer-Based Test (CBT).

Railway RRB NTPC Undergraduate Level Math Practice Set-4
Here are the MCQs:
Q.1.
Pipes A and B, when working together, can fill an empty tank in 8 hours. If B is stopped after 2 hours, it will take a total of 11 hours to fill the tank. How long would it take A to fill the empty tank alone?
a) 13 hours
b) 12 hours
c) 16 hours
d) 15 hours
Q.2.
One of the two inlet pipes works twice as efficiently as the other. The two, working alongside a drain pipe that can empty a cistern all by itself in 8 hours, can fill the empty cistern in 8 hours. How many hours will the less efficient inlet pipe take to fill the empty cistern by itself?
a) 8
b) 6
c) 12
d) 10
Q.3.
Two pipes A and B can fill an empty cistern in 32 and 48 hours, respectively. Pipe C can drain the entire cistern in 64 hours when no other pipe is in operation. Initially, when the cistern was empty, Pipe A and Pipe C were turned on. After a few hours, Pipe A was turned off, and Pipe B was turned on instantly. In all, it took 112 hours to fill the cistern. For how many hours was Pipe B turned on?
a) 84
b) 77
c) 70
d) 72
Q.4.
If 60% of (a – b) is the same as 40% of (a + b), then what percentage of a is b?
a) 20
b) 26
c) 22
d) 24
Q.5.
If 15% of A is equal to 18% of B, then what percentage of B is equal to 20% of A?
a) 25%
b) 42%
c) 24%
d) 20%
Q.6.
The difference between two numbers is 35% of the larger number. If the smaller number is 195, then the larger number is:
a) 320
b) 330
c) 350
d) 300
Q.7.
X is 6 times as large as Y. By what percentage is Y lesser than X?
a) 83%
b) 81%
c) 83.33%
d) 83%
Q.8.
Vikas spends 80% of his salary. His salary has increased by 25%, and his expenditure has increased by 15%. What is the percentage increase in his savings?
a) 60%
b) 50%
c) 55%
d) 65%
Also Read: Railway RRB Group D 2025 Reasoning SET 5 for CBT Exam
Q.9.
30% of 50% of 85% of an amount is 51. What is the amount?
a) 250
b) 350
c) 300
d) 400
Q.10.
If a man was to sell an article for 840, he would lose 20%. To gain 25%, he should sell it for:
a) 1,312.50
b)1,312.50
c) 1,200.50
d)1,200.50
Q.11.
A wholesaler sells a tin of oil at 540 and bears a loss of 10%. Now, if he decides to sell another tin of oil with the same cost at 696, his profit percentage in the sale of the second tin will be equal to:
a) 15%
b) 16%
c) 12%
d) 18%
Q.12.
Ashish sold a cow to Bipin for 5,000 by losing 20%. Bipin sold it to Kasim at that price which would have given Ashish a profit of 15%. What is Bipin’s gain in this transaction?
a) 2,100.00
b) 1,250.00
c) 2,187.50
d) 937.50
Q.13.
By selling a computer for ₹30,875, a shopkeeper suffers a loss of 5%. At what price should he sell it to gain 7%?
a) 34,775
b) 35,525
c) 33,985
d) 36,105
Q.14.
A dealer sold his goods at a discount of 20% but set the marked price of each article at 30% above the cost price. His gain percentage on each article is:
a) 4%
b) 8%
c) 5%
d) 10%
Q.15.
A trader offers a discount of 10% on an article if a customer makes the payment in cash. How much percentage above the cost price should he mark the article to make a profit of 10%? [Give your answer correct to 2 decimal places.
a) 15.22%
b) 11.22%
c) 20.22%
d) 22.22%
Also Read: Railway RRB Group D 2025 Math Practice SET 4 for CBT Exam
Answers to the Railway RRB NTPC Undergraduate Level Math Practice Set-4
Here are the answers:
- b
- c
- d
- a
- c
- d
- a
- d
- d
- a
- b
- c
- a
- a
- d
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