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SSC CPO Mock Test
A timed 25-question mock for the SSC Sub-Inspector in Delhi Police & CAPFs Examination covering percentages, speed, distance, trains & boats, logical reasoning, english grammar, vocabulary & idioms, indian polity, history & geography. Answer, submit and review every question with its explanation; set negative marking to match your exam’s current scheme.
SSC CPO mock test
25 questions · 1 mark each · the timer starts with your first answer and the test submits itself when time runs out.
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Q1.PercentagesTwo successive discounts of 30% and 12% are equivalent to a single discount of:
Answer: D — 38.4%
Net discount = a + b − ab/100 = 30 + 12 − 30×12/100 = 38.4%.
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Q2.Speed, Distance, Trains & BoatsA car goes from A to B at 45 km/h and returns at 75 km/h. What is its average speed for the round trip?
Answer: C — 56.25 km/h
For equal distances, average speed = 2xy/(x + y) = 2×45×75/120 = 56.25 km/h (not the simple average).
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Q3.Logical ReasoningIf CODE is coded as EQFG, how is BOOK coded?
Answer: C — DQQM
Each letter moves 2 places forward in the alphabet (CODE → EQFG), so BOOK → DQQM.
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Q4.English GrammarChoose the correct option: He prefers tea ___ coffee.
Answer: A — to
“Prefer X to Y” is the correct pattern.
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Q5.Vocabulary & IdiomsChoose the synonym of MITIGATE.
Answer: B — Lessen
Mitigate means make less severe or painful.
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Q6.Indian Polity, History & GeographyThe Chipko Movement was primarily concerned with:
Answer: B — Protection of trees
Villagers hugged trees to stop logging in the Garhwal Himalayas (1970s).
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Q7.PercentagesThe price of an item changes from ₹625 to ₹575. What is the percentage change?
Answer: C — 8% decrease
Change = -50 on a base of 625: -50/625 × 100 = 8% decrease. Always divide by the ORIGINAL value.
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Q8.Speed, Distance, Trains & BoatsA 140 m long train running at 108 km/h crosses a 370 m long platform. How long does it take?
Answer: B — 17 seconds
Speed = 108 × 5/18 = 30 m/s. Distance = train + platform = 140 + 370 = 510 m. Time = 510/30 = 17 s.
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Q9.Logical ReasoningRavi walks 6 m north, turns right and walks 5 m, then turns right again and walks 5 m. How far is he from the start?
Answer: D — 5.1 m
Net: 1 m north and 5 m east. Distance = √(1² + 5²) = 5.1 m.
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Q10.English GrammarChoose the correct form: By the time we arrived, the film ___.
Answer: B — had already started
An action completed before another past action takes the past perfect: “had already started”.
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Q11.Vocabulary & IdiomsChoose the antonym of CANDOUR.
Answer: B — Deceit
Candour = openness and honesty; deceit is its opposite.
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Q12.Indian Polity, History & GeographyUnder Article 81, the maximum number of Lok Sabha members chosen from the States is:
Answer: D — 530
Article 81 allows up to 530 members from the States and up to 20 from the Union Territories.
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Q13.PercentagesTwo successive discounts of 25% and 15% are equivalent to a single discount of:
Answer: A — 36.25%
Net discount = a + b − ab/100 = 25 + 15 − 25×15/100 = 36.25%.
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Q14.Speed, Distance, Trains & BoatsA 130 m long train running at 72 km/h crosses a 110 m long platform. How long does it take?
Answer: C — 12 seconds
Speed = 72 × 5/18 = 20 m/s. Distance = train + platform = 130 + 110 = 240 m. Time = 240/20 = 12 s.
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Q15.Logical ReasoningWhich number is the odd one out: 19, 49, 51, 55?
Answer: A — 19
49, 55, 51 are composite; 19 is prime.
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Q16.English GrammarChoose the correct option: She has been working here ___ 2019.
Answer: C — since
Use “since” with a point in time (2019) and “for” with a duration.
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Q17.Vocabulary & IdiomsChoose the synonym of PRUDENT.
Answer: A — Wise
Prudent means acting with care and good judgement.
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Q18.Indian Polity, History & GeographyThe ‘Basic Structure’ doctrine was laid down in which case?
Answer: C — Kesavananda Bharati (1973)
Kesavananda Bharati v. State of Kerala (1973) held Parliament cannot alter the basic structure.
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Q19.PercentagesTwo successive discounts of 20% and 15% are equivalent to a single discount of:
Answer: A — 32%
Net discount = a + b − ab/100 = 20 + 15 − 20×15/100 = 32%.
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Q20.Speed, Distance, Trains & BoatsA 300 m long train running at 108 km/h crosses a 380 m long platform. How long does it take?
Answer: B — 22.67 seconds
Speed = 108 × 5/18 = 30 m/s. Distance = train + platform = 300 + 380 = 680 m. Time = 680/30 = 22.67 s.
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Q21.Logical ReasoningWhat is the angle between the hour and minute hands of a clock at 4:30?
Answer: B — 45°
Angle = |30H − 5.5M| = |30×4 − 5.5×30| = 45°.
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Q22.English GrammarChoose the correct option: She is senior ___ me by two years.
Answer: D — to
Latin comparatives (senior, junior, superior, inferior) take “to”, not “than”.
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Q23.Vocabulary & IdiomsChoose the synonym of METICULOUS.
Answer: C — Thorough
Meticulous means showing great attention to detail — thorough.
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Q24.Indian Polity, History & GeographyThe Chola dynasty is best known for its:
Answer: D — Naval power and temple architecture
The Cholas built a powerful navy and temples such as the Brihadeeswarar temple at Thanjavur.
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Q25.PercentagesTwo successive discounts of 30% and 15% are equivalent to a single discount of:
Answer: B — 40.5%
Net discount = a + b − ab/100 = 30 + 15 − 30×15/100 = 40.5%.
How the mock test works
- The timer starts with your first answer; the test submits itself when time runs out.
- Choose the negative marking that matches your exam (many Indian exams deduct ¼ or ⅓ of a mark — check the official notification).
- After submitting you get your score, accuracy, time taken and a topic-wise breakdown, then every explanation.
- “New mock test” builds another paper — calculation questions get new numbers.
About SSC CPO
SSC Sub-Inspector in Delhi Police & CAPFs Examination — conducted by Staff Selection Commission (SSC). Recruits Sub-Inspectors for Delhi Police and the Central Armed Police Forces.
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.
SSC CPO practice topics
| Topic | Section | Question source |
|---|---|---|
| Percentages | Quantitative aptitude | Calculated (new numbers every set) |
| Speed, Distance, Trains & Boats | Quantitative aptitude | Calculated (new numbers every set) |
| Logical Reasoning | Reasoning | Calculated (new numbers every set) |
| English Grammar | English | Question bank |
| Vocabulary & Idioms | English | Question bank |
| Indian Polity, History & Geography | General awareness | Question bank |