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BCS Preliminary Mock Test
A timed 25-question mock for the Bangladesh Civil Service Preliminary Test covering world general knowledge, english grammar, percentages, logical reasoning, computer awareness. Answer, submit and review every question with its explanation; set negative marking to match your exam’s current scheme.
BCS Preliminary 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.World General KnowledgeWhich gas makes up most of Earth’s atmosphere?
Answer: D — Nitrogen
Nitrogen is about 78% of the atmosphere.
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Q2.English GrammarChoose the correct option: Let’s discuss ___ the matter tomorrow.
Answer: B — no preposition
“Discuss” is transitive: we discuss the matter (no “about”).
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Q3.PercentagesThe price of an item changes from ৳900 to ৳1,012.5. What is the percentage change?
Answer: A — 12.5% increase
Change = 112.5 on a base of 900: 112.5/900 × 100 = 12.5% increase. Always divide by the ORIGINAL value.
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Q4.Logical ReasoningWhich number is the odd one out: 11, 17, 33, 61?
Answer: A — 33
11, 17, 61 are prime; 33 is composite (33 = 3 × 11).
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Q5.Computer AwarenessWhich shortcut copies selected text in most applications?
Answer: A — Ctrl + C
Ctrl + C copies; Ctrl + V pastes; Ctrl + X cuts; Ctrl + Z undoes.
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Q6.World General KnowledgeWhich country is known as the Land of the Rising Sun?
Answer: A — Japan
Japan’s name (Nihon) means ‘origin of the sun’.
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Q7.English GrammarChoose the correct option: Hardly had he left ___ it started raining.
Answer: C — when
The correlative pair is “hardly … when” (also “no sooner … than”).
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Q8.PercentagesWhat is 75% of 100?
Answer: B — 75
75% of 100 = 75/100 × 100 = 75.
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Q9.Logical ReasoningWhat is the angle between the hour and minute hands of a clock at 7:45?
Answer: A — 37.5°
Angle = |30H − 5.5M| = |30×7 − 5.5×45| = 37.5°.
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Q10.Computer AwarenessRAM is a type of:
Answer: C — Volatile memory
RAM loses its contents when power is off — it is volatile.
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Q11.World General KnowledgeWhich is the smallest country in the world by area?
Answer: D — Vatican City
Vatican City is about 0.44 km².
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Q12.English GrammarIdentify the error: “Each of the students have submitted their assignment.”
Answer: B — have submitted
“Each” is singular, so the verb should be “has submitted”.
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Q13.PercentagesTwo successive discounts of 25% and 5% are equivalent to a single discount of:
Answer: C — 28.75%
Net discount = a + b − ab/100 = 25 + 5 − 25×5/100 = 28.75%.
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Q14.Logical ReasoningRavi walks 9 m north, turns right and walks 3 m, then turns right again and walks 8 m. How far is he from the start?
Answer: C — 3.16 m
Net: 1 m north and 3 m east. Distance = √(1² + 3²) = 3.16 m.
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Q15.Computer Awareness1 kilobyte (KB) in binary units equals:
Answer: B — 1,024 bytes
In binary (KiB) usage, 1 KB = 2¹⁰ = 1,024 bytes.
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Q16.World General KnowledgeWhich organisation publishes the World Economic Outlook?
Answer: B — IMF
The International Monetary Fund publishes the World Economic Outlook.
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Q17.English GrammarChoose the correct option: I look forward to ___ from you.
Answer: D — hearing
In “look forward to”, “to” is a preposition, so it takes a gerund: “hearing”.
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Q18.PercentagesTwo successive discounts of 10% and 5% are equivalent to a single discount of:
Answer: A — 14.5%
Net discount = a + b − ab/100 = 10 + 5 − 10×5/100 = 14.5%.
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Q19.Logical ReasoningIf BOOK is coded as FSSO, how is LAMP coded?
Answer: D — PEQT
Each letter moves 4 places forward in the alphabet (BOOK → FSSO), so LAMP → PEQT.
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Q20.Computer AwarenessWhich of these is an operating system?
Answer: A — Linux
Linux is an operating system kernel (with distributions such as Ubuntu).
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Q21.World General KnowledgeWhich country has the largest land area?
Answer: C — Russia
Russia is the largest country by area (about 17 million km²).
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Q22.English GrammarChoose the correct option: The train ___ by the time we reach the station.
Answer: B — will have left
An action completed before a future point takes the future perfect: “will have left”.
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Q23.PercentagesWhat is 75% of 500?
Answer: C — 375
75% of 500 = 75/100 × 500 = 375.
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Q24.Logical ReasoningFind the next letter: H, K, N, Q, ?
Answer: B — T
The letters advance by 3 each time (skip 2).
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Q25.Computer AwarenessThe brain of the computer is the:
Answer: C — CPU
The Central Processing Unit executes instructions.
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 (this test has no negative marking by default — 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 BCS Preliminary
Bangladesh Civil Service Preliminary Test — conducted by Bangladesh Public Service Commission (BPSC). The preliminary screening test for Bangladesh’s civil service cadres.
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.
BCS Preliminary practice topics
| Topic | Section | Question source |
|---|---|---|
| World General Knowledge | General awareness | Question bank |
| English Grammar | English | Question bank |
| Percentages | Quantitative aptitude | Calculated (new numbers every set) |
| Logical Reasoning | Reasoning | Calculated (new numbers every set) |
| Computer Awareness | Computer knowledge | Question bank |