Ratio and proportion · solved example
Divide Rs 350 in the ratio 3 : 4. Find the larger part.
- 180
- 150
- 210
- 200Correct
Solution
The total has 7 parts, so the larger (4 parts) is 350 × 4/7 = 200.
Railways | RPF Constable
Mathematics for RPF Constable
RPF Constable sets 35 Mathematics questions for 35 marks in the Computer Based Test, so it is worth planning your preparation around the topics below.
35 questions35 marks13 topics
How to approach Mathematics in RPF Constable
The quantitative core of the railway papers: arithmetic, mensuration, and time-speed-distance built on a secondary-school foundation. Fluency with fractions, percentages and ratios underlies almost every question, so that is where practice pays back fastest.
Weightage in the paper
How much Mathematics is worth in each RPF Constable stage, from the official pattern.
| Stage | Questions | Marks | Time | Share |
|---|---|---|---|---|
| Computer Based Test | 35 | 35 | — | 29% |
Mathematics syllabus for RPF Constable
Every topic in the official syllabus. The linked ones open a set of solved questions you can practise straight away.
- Number system and simplification
- Decimals and fractions
- LCM and HCF
- Ratio and proportion
- Percentage
- Average
- Profit and loss
- Simple and compound interest
- Discount
- Time and work
- Time, speed and distance
- Mensuration
- Tables and graphs at basic level
Sample Mathematics questions with solutions
Written to the RPF Constable pattern, with the answer key and the method behind it — a look at how the section is actually set before you drill the full topic sets.
Mensuration · solved example
Find the area of a triangle with base 14 cm and height 8 cm.
- 58
- 54
- 56Correct
- 60
- 52
Solution
Area = ½ × base × height = ½ × 14 × 8 = 56 square cm.
Average · solved example
Find the average of 35, 37, 39, 41, 43, 45.
- 50
- 30
- 24
- 56
- 40Correct
Solution
The sum of the 6 numbers is 240, and dividing by 6 gives 40.
Compound interest · solved example
Find the compound interest on Rs 2000 at 5% per annum for 2 years, compounded annually.
- 165
- 205Correct
- 255
- 155
- 245
Solution
Amount = 2000(1+5/100)² = 2205. Compound interest = 2205 − 2000 = 205.
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Mathematics study material
Sit Mathematics under a real clock
Mathematics shows up in every RPF Constable mock test, in the same interface, with sectional locking and negative marking.
Frequently asked questions
How many Mathematics questions are asked in RPF Constable?
RPF Constable Latest notified cycle sets 35 Mathematics questions for 35 marks in the Computer Based Test.
Is there negative marking for Mathematics in RPF Constable?
Yes. RPF Constable deducts one third of a mark for each wrong answer, Mathematics included, so unsure guesses cost you. One third of a mark is deducted for each wrong answer. Questions left blank carry no penalty.
Which Mathematics topics matter most for RPF Constable?
The RPF Constable syllabus lists Number system and simplification, Decimals and fractions, LCM and HCF, Ratio and proportion, Percentage, Average and more. Weight your revision towards the ones you are weakest on and confirm the emphasis against the paper analysis for recent cycles.
How can I practise Mathematics for RPF Constable free?
Every Mathematics question on this site is free and written to the exam pattern. Use the topic drills for instant-feedback practice, the daily quiz to keep the section warm, and the RPF Constable mock tests to sit it under a real clock with negative marking.