Preparing for the RRB Group D examination requires a clear understanding of Mathematics concepts, regular practice, and effective time management. Mathematics is an important part of the Computer-Based Test (CBT), and candidates need to solve numerical questions accurately within the available time.
If you are preparing for the Railway Recruitment Board Group D exam, practising RRB Group D Mathematics questions with solutions can help you understand important concepts, improve calculation speed, and identify topics that require more attention.
In this article, EliveClass brings you important Mathematics practice questions with step-by-step solutions, along with useful preparation tips for railway exam aspirants.
RRB Group D Mathematics Syllabus
Before solving practice questions, candidates should understand the important Mathematics topics commonly included in the RRB Group D syllabus.
These topics include:
- Number System
- Simplification
- LCM and HCF
- Fractions and Decimals
- Percentage
- Ratio and Proportion
- Profit and Loss
- Simple and Compound Interest
- Time and Work
- Time and Distance
- Average
- Mensuration
- Algebra
- Geometry
- Trigonometry
- Age Calculations
- Pipes and Cisterns
Candidates should check the latest official RRB Group D notification for the applicable syllabus and examination pattern.
10 Important RRB Group D Mathematics Questions with Solutions
Practise the following questions to strengthen your numerical skills. These are practice questions created for revision, not actual previous-year exam questions.
Question 1: Percentage
Question: What is 25% of 480?
A) 100
B) 110
C) 120
D) 140
Solution:
Percentage means a value out of 100.
25% of 480 = (25/100) × 480
= 1/4 × 480
= 120
Correct Answer: C) 120
Question 2: Ratio and Proportion
Question: The ratio of two numbers is 3:5. If their sum is 640, find the larger number.
A) 240
B) 320
C) 400
D) 420
Solution:
Total ratio = 3 + 5 = 8
Value of one part = 640 ÷ 8 = 80
Larger number = 5 × 80 = 400
Correct Answer: C) 400
Question 3: Profit and Loss
Question: A shopkeeper purchases an item for ₹800 and sells it for ₹920. Find the profit percentage.
A) 10%
B) 12%
C) 15%
D) 20%
Solution:
Profit = Selling Price − Cost Price
= ₹920 − ₹800 = ₹120
Profit percentage = (Profit ÷ Cost Price) × 100
= (120 ÷ 800) × 100
= 15%
Correct Answer: C) 15%
Question 4: Simple Interest
Question: Calculate the simple interest on ₹5,000 at 8% per annum for 2 years.
A) ₹600
B) ₹700
C) ₹800
D) ₹900
Solution:
Simple Interest = (Principal × Rate × Time) ÷ 100
= (5,000 × 8 × 2) ÷ 100
= ₹800
Correct Answer: C) ₹800
Question 5: Time and Distance
Question: A train 180 metres long crosses a pole in 12 seconds. What is its speed in km/h?
A) 45 km/h
B) 48 km/h
C) 54 km/h
D) 60 km/h
Solution:
Speed = Distance ÷ Time
= 180 ÷ 12 = 15 metres per second
To convert metres per second into km/h, multiply by 18/5.
Speed = 15 × 18/5 = 54 km/h
Correct Answer: C) 54 km/h
Question 6: Time and Work
Question: A can complete a job in 12 days, and B can complete the same job in 18 days. How many days will they take working together?
A) 6 days
B) 7.2 days
C) 8 days
D) 9 days
Solution:
A’s one-day work = 1/12
B’s one-day work = 1/18
Combined one-day work = 1/12 + 1/18
= 3/36 + 2/36 = 5/36
Total time = 36/5 = 7.2 days
Correct Answer: B) 7.2 days
Question 7: Average
Question: The average of five numbers is 18. If four numbers add up to 68, find the fifth number.
A) 18
B) 20
C) 22
D) 24
Solution:
Sum of five numbers = Average × Number of values
= 18 × 5 = 90
Fifth number = 90 − 68 = 22
Correct Answer: C) 22
Question 8: LCM
Question: Find the least common multiple (LCM) of 12, 18, and 30.
A) 60
B) 90
C) 120
D) 180
Solution:
Prime factorization:
12 = 2² × 3
18 = 2 × 3²
30 = 2 × 3 × 5
Take the highest power of each prime factor.
LCM = 2² × 3² × 5
= 4 × 9 × 5
= 180
Correct Answer: D) 180
Question 9: Fractions
Question: Simplify: 3/5 + 7/10 − 1/2.
A) 1/2
B) 3/5
C) 4/5
D) 9/10
Solution:
The common denominator is 10.
3/5 = 6/10
1/2 = 5/10
Therefore:
6/10 + 7/10 − 5/10 = 8/10
= 4/5
Correct Answer: C) 4/5
Question 10: Mensuration
Question: A rectangle has a length of 24 cm and a breadth of 15 cm. Find its perimeter.
A) 68 cm
B) 72 cm
C) 78 cm
D) 80 cm
Solution:
Perimeter of a rectangle = 2 × (Length + Breadth)
= 2 × (24 + 15)
= 2 × 39
= 78 cm
Correct Answer: C) 78 cm
Tips to Prepare for RRB Group D Mathematics
Follow these practical strategies to improve your Mathematics performance.
1. Strengthen basic concepts: Learn formulas and understand how to apply them before attempting difficult questions.
2. Practise daily: Solve questions from topics such as percentages, averages, ratios, and time and work regularly.
3. Memorise important formulas: Maintain a notebook of formulas and revise it frequently.
4. Improve calculation speed: Practise mental calculations and use shortcuts only when you understand the underlying concept.
5. Take mock tests: Attempt timed Mathematics practice tests to become familiar with exam-style questions and improve time management.
6. Analyse your mistakes: Review every incorrect answer and identify whether the problem was caused by a conceptual error, calculation mistake, or lack of time.
Practise RRB Group D Mathematics with EliveClass
Regular practice is essential for improving accuracy and confidence in railway examinations. EliveClass.com provides RRB Group D preparation resources, including Mathematics practice questions, mock tests, and other learning materials to support candidates throughout their preparation.
You can use these resources to practise different question types, revise important concepts, and assess your progress through regular tests.
Combine online practice with syllabus revision and previous-year question papers to develop a structured preparation routine.
Conclusion
Practising RRB Group D Mathematics questions with solutions is an effective way to strengthen your numerical skills and prepare for the railway recruitment examination.
Start with fundamental topics, understand the methods used to solve each question, and gradually increase the difficulty of your practice. Regular revision, timed tests, and careful analysis of mistakes can help you improve your performance.
Visit EliveClass.com to explore RRB Group D mock tests and practice resources, and make Mathematics practice a consistent part of your railway exam preparation.
