Letter series · solved example
Find the next term: A, C, F, J, ?
- OCorrect
- N
- P
- M
Solution
The gaps increase by one each step: A to C (+2), C to F (+3), F to J (+4), so J to O (+5).
Defence | CISF Constable (Tradesman)
CISF Constable (Tradesman) sets 25 General Intelligence & Reasoning questions for 25 marks in the Written Examination, 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 CISF Constable (Tradesman) stage, from the official pattern.
| Stage | Questions | Marks | Time | Share |
|---|---|---|---|---|
| Written Examination | 25 | 25 | — | 25% |
Every topic in the official syllabus. The linked ones open a set of solved questions you can practise straight away.
Written to the CISF Constable (Tradesman) 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.
Letter series · solved example
Find the next term: A, C, F, J, ?
Solution
The gaps increase by one each step: A to C (+2), C to F (+3), F to J (+4), so J to O (+5).
Blood relations · solved example
M is the brother of N. N is the sister of P. How is M related to P?
Solution
M and N are siblings, and N and P are siblings, so M and P are siblings. Since M is male, M is P's brother.
Number series · solved example
Find the next term: 2, 6, 12, 20, ?
Solution
The differences are +4, +6, +8, so the next difference is +10. 20 + 10 = 30.
Direction sense · solved example
A guard walks 5 m south, then turns right and walks 12 m. How far is he from the starting point?
Solution
Turning right from south faces west. The path forms a right triangle with legs 5 m and 12 m. Distance = √(5²+12²) = √169 = 13 m.
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General Intelligence & Reasoning shows up in every CISF Constable (Tradesman) mock test, in the same interface, with sectional locking and negative marking.
CISF Constable (Tradesman): 16-question practice mock
16 questions | 20 min
CISF Constable (Tradesman) 2024 cycle sets 25 General Intelligence & Reasoning questions for 25 marks in the Written Examination.
No. The CISF Constable (Tradesman) written stage carries no negative marking, so it is worth attempting every General Intelligence & Reasoning question you can.
The CISF Constable (Tradesman) 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 CISF Constable (Tradesman) mock tests to sit it under a real clock with negative marking.