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BCS Preliminary Logical Reasoning Questions
Practise logical reasoning (reasoning) for the Bangladesh Civil Service Preliminary Test: 10 multiple-choice questions, each with the correct answer and a worked explanation. Click an option to check it, or “New questions” for another set.
Logical Reasoning practice
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Q1.Ravi walks 8 m north, turns right and walks 2 m, then turns right again and walks 5 m. How far is he from the start?
Show answer & explanation
Answer: D — 3.61 m
Net: 3 m north and 2 m east. Distance = √(3² + 2²) = 3.61 m.
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Q2.Find the next letter: C, G, K, O, ?
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Answer: A — S
The letters advance by 4 each time (skip 3).
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Q3.Ravi walks 12 m north, turns right and walks 6 m, then turns right again and walks 9 m. How far is he from the start?
Show answer & explanation
Answer: D — 6.71 m
Net: 3 m north and 6 m east. Distance = √(3² + 6²) = 6.71 m.
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Q4.Find the next letter: B, D, F, H, ?
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Answer: D — J
The letters advance by 2 each time (skip 1).
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Q5.Which number is the odd one out: 13, 39, 63, 65?
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Answer: D — 13
65, 39, 63 are composite; 13 is prime.
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Q6.Find the next letter: I, K, M, O, ?
Show answer & explanation
Answer: B — Q
The letters advance by 2 each time (skip 1).
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Q7.Which number is the odd one out: 21, 33, 61, 63?
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Answer: D — 61
21, 63, 33 are composite; 61 is prime.
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Q8.What is the angle between the hour and minute hands of a clock at 12:50?
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Answer: A — 85°
Angle = |30H − 5.5M| = |30×12 − 5.5×50| = 85°.
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Q9.What day of the week was 10 September 2024?
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Answer: A — Tuesday
Using odd days (or Zeller’s rule), 10 September 2024 falls on a Tuesday.
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Q10.Ravi walks 6 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: B — 9.06 m
Net: 1 m north and 9 m east. Distance = √(1² + 9²) = 9.06 m.
How to approach logical reasoning questions
For coding questions write the letter positions (A = 1 … Z = 26). For directions, draw axes and track each turn. Clock angle = |30H − 5.5M|. Calendar: count odd days.
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 |