Number series · solved example
Find the next term: 5, 11, 23, 47, ?
- 95Correct
- 94
- 96
- 91
Solution
Each term is double the previous plus one: 5×2+1=11, 11×2+1=23, 23×2+1=47, and 47×2+1=95.
Defence | BSF Water Wing (Group B & C)
BSF Water Wing (Group B & C) sets 35 General Intelligence & Reasoning questions for 35 marks in the Written Examination (HC / Constable paper), so it is worth planning your preparation around the topics below.
The non-verbal and analytical reasoning that SSC and railway papers lean on: series, analogy, classification, coding and the figure-based questions. It rewards pattern recognition built through volume, so the return on drilling a lot of questions is unusually high here.
How much General Intelligence & Reasoning is worth in each BSF Water Wing (Group B & C) stage, from the official pattern.
| Stage | Questions | Marks | Time | Share |
|---|---|---|---|---|
| Written Examination (HC / Constable paper) | 35 | 35 | — | 35% |
Every topic in the official syllabus. The linked ones open a set of solved questions you can practise straight away.
Written to the BSF Water Wing (Group B & C) pattern, with the answer key and the method behind it — a look at how the section is actually set before you drill the full topic sets.
Number series · solved example
Find the next term: 5, 11, 23, 47, ?
Solution
Each term is double the previous plus one: 5×2+1=11, 11×2+1=23, 23×2+1=47, and 47×2+1=95.
Analogy · solved example
Compass : Direction :: Anchor : ?
Solution
A compass helps determine direction; an anchor keeps a vessel stable and prevents drifting — the functional relationship is tool to purpose.
Direction sense · solved example
A boat travels 6 km east, then 8 km north. How far is it from the starting point?
Solution
The path forms a right triangle with legs 6 km and 8 km. Distance from start = √(6²+8²) = √(36+64) = √100 = 10 km.
Coding-decoding · solved example
If 'BOAT' is coded as 'CPBU', how is 'CREW' coded using the same pattern?
Solution
Each letter moves one place forward: C→D, R→S, E→F, W→X. So CREW becomes DSFX.
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General Intelligence & Reasoning shows up in every BSF Water Wing (Group B & C) mock test, in the same interface, with sectional locking and negative marking.
BSF Water Wing: 16-question practice mock
16 questions | 20 min
BSF Water Wing (Group B & C) 2024 cycle sets 35 General Intelligence & Reasoning questions for 35 marks in the Written Examination (HC / Constable paper).
No. The BSF Water Wing (Group B & C) written stage carries no negative marking, so it is worth attempting every General Intelligence & Reasoning question you can.
The BSF Water Wing (Group B & C) syllabus lists Coding-decoding and number or letter series, Blood relations and directions, Analytical reasoning and puzzles, Classification and pattern recognition, Non-verbal and verbal reasoning at matriculation level. Weight your revision towards the ones you are weakest on and confirm the emphasis against the paper analysis for recent cycles.
Every General Intelligence & Reasoning question on this site is free and written to the exam pattern. Use the topic drills for instant-feedback practice, the daily quiz to keep the section warm, and the BSF Water Wing (Group B & C) mock tests to sit it under a real clock with negative marking.