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SSC CPO Practice Questions
Original practice questions for the SSC Sub-Inspector in Delhi Police & CAPFs Examination (Staff Selection Commission (SSC)), mixed across 6 topics with instant answers and explanations. Practise by topic below or take the timed mock test.
SSC CPO mixed practice
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Q1.PercentagesThe price of an item changes from ₹300 to ₹276. What is the percentage change?
Show answer & explanation
Answer: C — 8% decrease
Change = -24 on a base of 300: -24/300 × 100 = 8% decrease. Always divide by the ORIGINAL value.
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Q2.Speed, Distance, Trains & BoatsA boat goes 11 km/h downstream and 5 km/h upstream. What is its speed in still water?
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Answer: B — 8 km/h
Speed in still water = (downstream + upstream)/2 = (11 + 5)/2 = 8 km/h; stream = (11 − 5)/2 = 3 km/h.
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Q3.Logical ReasoningWhich number is the odd one out: 13, 17, 19, 55?
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Answer: B — 55
19, 13, 17 are prime; 55 is composite (55 = 5 × 11).
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Q4.English GrammarChoose the correct option: I look forward to ___ from you.
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Answer: C — hearing
In “look forward to”, “to” is a preposition, so it takes a gerund: “hearing”.
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Q5.Vocabulary & IdiomsChoose the word closest in meaning to PRAGMATIC.
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Answer: D — Practical
Pragmatic means dealing with things sensibly and realistically.
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Q6.Indian Polity, History & GeographyLothal, a Harappan site with a dockyard, is in present-day:
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Answer: A — Gujarat
Lothal is in Gujarat.
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Q7.PercentagesThe price of an item changes from ₹975 to ₹853.13. What is the percentage change?
Show answer & explanation
Answer: C — 12.5% decrease
Change = -121.88 on a base of 975: -121.88/975 × 100 = 12.5% decrease. Always divide by the ORIGINAL value.
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Q8.Speed, Distance, Trains & BoatsA 260 m long train running at 72 km/h crosses a 90 m long platform. How long does it take?
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Answer: D — 17.5 seconds
Speed = 72 × 5/18 = 20 m/s. Distance = train + platform = 260 + 90 = 350 m. Time = 350/20 = 17.5 s.
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Q9.Logical ReasoningFind the next letter: C, E, G, I, ?
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Answer: B — K
The letters advance by 2 each time (skip 1).
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Q10.English GrammarChoose the correct preposition: She is good ___ mathematics.
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Answer: D — at
The idiom is “good at” a subject or skill.
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.
Practise by topic
- 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.
- Speed, Distance, Trains & Boats questions — Convert km/h to m/s by × 5/18.
- Logical Reasoning questions — For coding questions write the letter positions (A = 1 … Z = 26).
- English Grammar questions — Find the subject first and make the verb agree with it, ignoring phrases in between.
- Vocabulary & Idioms questions — Learn words in synonym/antonym pairs and by roots (bene = good, mal = bad, chron = time).
- 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.
- SSC CPO mock test — 25 timed questions with negative marking.
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 |