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RRB Group D Practice Questions
Original practice questions for the RRB Level 1 (Group D) Examination (Railway Recruitment Boards (RRB)), mixed across 7 topics with instant answers and explanations. Practise by topic below or take the timed mock test.
RRB Group D mixed practice
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Q1.Number System & SimplificationWhat is √5,184?
Show answer & explanation
Answer: D — 72
72 × 72 = 5184, so √5184 = 72.
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Q2.PercentagesWhat is 85% of 880?
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Answer: D — 748
85% of 880 = 85/100 × 880 = 748.
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Q3.Logical ReasoningWhich number is the odd one out: 27, 39, 43, 49?
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Answer: B — 43
27, 49, 39 are composite; 43 is prime.
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Q4.PhysicsThe frequency of a wave is measured in:
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Answer: B — Hertz
1 hertz = 1 cycle per second.
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Q5.ChemistryThe process of converting a solid directly into a gas is called:
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Answer: D — Sublimation
Sublimation, e.g. dry ice or naphthalene.
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Q6.BiologyWho proposed the theory of evolution by natural selection?
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Answer: A — Charles Darwin
Darwin (with Wallace) proposed natural selection; ‘On the Origin of Species’ was published in 1859.
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Q7.Indian Polity, History & GeographyWhich Article deals with the Right to Constitutional Remedies?
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Answer: C — Article 32
Article 32 lets citizens move the Supreme Court to enforce Fundamental Rights.
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Q8.Number System & SimplificationFind the next number in the series: 16, 18, 22, 28, 36, ?
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Answer: B — 46
Differences are 2, 4, 6, 8 → next difference 10.
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Q9.PercentagesThe price of an item changes from ₹350 to ₹378. What is the percentage change?
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Answer: B — 8% increase
Change = 28 on a base of 350: 28/350 × 100 = 8% increase. Always divide by the ORIGINAL value.
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Q10.Logical ReasoningRavi walks 10 m north, turns right and walks 9 m, then turns right again and walks 5 m. How far is he from the start?
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Answer: D — 10.3 m
Net: 5 m north and 9 m east. Distance = √(5² + 9²) = 10.3 m.
About RRB Group D
RRB Level 1 (Group D) Examination — conducted by Railway Recruitment Boards (RRB). Recruits track maintainers, helpers and assistants; general science carries significant weight.
Original practice questions written for this site in the style and difficulty of each exam’s syllabus. They are not past papers and the site is not affiliated with any exam body. Exam patterns, marking schemes and syllabi change — always check the latest official notification.
Practise by topic
- Number System & Simplification questions — Learn squares to 30 and cubes to 15, apply BODMAS strictly, and use HCF × LCM = product of two numbers.
- Percentages questions — Convert percentages to fractions you know by heart (12.5% = 1/8, 37.5% = 3/8, 16.67% = 1/6) and always divide a change by the ORIGINAL value.
- Logical Reasoning questions — For coding questions write the letter positions (A = 1 … Z = 26).
- Physics questions — Write the formula before substituting and keep SI units throughout.
- Chemistry questions — Moles = mass ÷ molar mass; molarity = moles ÷ litres.
- Biology questions — Learn structure → function links (mitochondria → ATP, nephron → filtration), the major hormones and their glands, and deficiency diseases.
- Indian Polity, History & Geography questions — Anchor facts to the Constitution’s Parts and key Articles (III Fundamental Rights, IV DPSP, 32, 352, 356, 360) and build timelines for the freedom struggle.
- RRB Group D mock test — 25 timed questions with negative marking.
RRB Group D practice topics
| Topic | Section | Question source |
|---|---|---|
| Number System & Simplification | Quantitative aptitude | Calculated (new numbers every set) |
| Percentages | Quantitative aptitude | Calculated (new numbers every set) |
| Logical Reasoning | Reasoning | Calculated (new numbers every set) |
| Physics | Science | Calculated + question bank |
| Chemistry | Science | Calculated + question bank |
| Biology | Science | Question bank |
| Indian Polity, History & Geography | General awareness | Question bank |