Simple interest · solved example
Find the simple interest on Rs 5000 at 8% per annum for 3 years.
- 1100
- 1200Correct
- 1300
- 1250
Solution
Simple interest = P × R × T ÷ 100 = 5000 × 8 × 3 ÷ 100 = 1200.
Railways | RRB JE
Mathematics for RRB JE
RRB JE sets 30 Mathematics questions for 30 marks in the Computer Based Test 1, so it is worth planning your preparation around the topics below.
30 questions30 marks13 topics
How to approach Mathematics in RRB JE
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 RRB JE stage, from the official pattern.
| Stage | Questions | Marks | Time | Share |
|---|---|---|---|---|
| Computer Based Test 1 | 30 | 30 | — | 30% |
Mathematics syllabus for RRB JE
Every topic in the official syllabus. The linked ones open a set of solved questions you can practise straight away.
- Number system, BODMAS, decimals and fractions
- LCM and HCF
- Ratio and proportion
- Percentage
- Mensuration
- Time and work
- Time, speed and distance
- Simple and compound interest
- Profit and loss
- Algebra
- Geometry and trigonometry
- Elementary statistics
- Square root, age calculations, calendar and clock, pipes and cistern
Sample Mathematics questions with solutions
Written to the RRB JE 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.
Simplification · solved example
Solve: 15 + 10 × 3
- 31
- 45Correct
- 59
- 39
- 51
Solution
By BODMAS, multiply first: 10 × 3 = 30, then 15 + 30 = 45.
Ratio and proportion · solved example
Rs 1200 is divided between A and B in the ratio 3 : 5. Find B’s share.
- 750Correct
- 600
- 450
- 720
Solution
The total has 3 + 5 = 8 parts, so B gets 5 parts: 1200 × 5/8 = 750.
Unitary method · solved example
If 8 pens cost Rupees 96, what is the cost of 15 pens?
- Rupees 160
- Rupees 172
- Rupees 180Correct
- Rupees 190
Solution
One pen costs 96/8 = 12 rupees, so 15 pens cost 15 x 12 = 180 rupees. This is the unitary method: find the value of one unit, then scale. It is worth doing in one step where you can, since 96 x 15/8 = 12 x 15 = 180 avoids writing anything down.
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Sit Mathematics under a real clock
Mathematics shows up in every RRB JE mock test, in the same interface, with sectional locking and negative marking.
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RRB JE: 28-question practice mock
28 questions | 28 min
Frequently asked questions
How many Mathematics questions are asked in RRB JE?
RRB JE Latest notified cycle sets 30 Mathematics questions for 30 marks in the Computer Based Test 1.
Is there negative marking for Mathematics in RRB JE?
Yes. RRB JE 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.
Which Mathematics topics matter most for RRB JE?
The RRB JE syllabus lists Number system, BODMAS, decimals and fractions, LCM and HCF, Ratio and proportion, Percentage, Mensuration, Time and work 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 RRB JE 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 RRB JE mock tests to sit it under a real clock with negative marking.