Number series · solved example
Find the next term: 3, 7, 15, 31, ?
- 55
- 59
- 63Correct
- 67
Solution
Each term follows ×2 + 1: 3×2+1 = 7, 7×2+1 = 15, 15×2+1 = 31, so the next term is 31×2+1 = 63.
Police & Paramilitary | Rajasthan Jail Prahari
Rajasthan Jail Prahari sets 45 Reasoning Ability questions for 180 marks in the Written Examination, so it is worth planning your preparation around the topics below.
The puzzles and seating arrangements carry the most marks and take the most time, so the skill is choosing which set to attempt and which to leave. Clear the quick scoring topics — inequality, syllogism, coding-decoding, blood relations — first, then spend the remaining time on one or two puzzles you can actually finish.
How much Reasoning Ability is worth in each Rajasthan Jail Prahari stage, from the official pattern.
| Stage | Questions | Marks | Time | Share |
|---|---|---|---|---|
| Written Examination | 45 | 180 | — | 45% |
Every topic in the official syllabus. The linked ones open a set of solved questions you can practise straight away.
Written to the Rajasthan Jail Prahari 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: 3, 7, 15, 31, ?
Solution
Each term follows ×2 + 1: 3×2+1 = 7, 7×2+1 = 15, 15×2+1 = 31, so the next term is 31×2+1 = 63.
Coding-decoding · solved example
If GUARD is coded as HTBSE, how is PRISON coded?
Solution
Each letter is shifted one place forward: G→H, U→V… Applying +1 to PRISON gives Q, S, J, T, P, O — that is, QSJTPO.
Analogy · solved example
Key is to Lock as Password is to:
Solution
A key opens a lock; a password unlocks or secures an account. Computer, keyboard and screen are devices, not what a password directly secures.
Blood relations · solved example
Pointing to a man, Rekha says, 'He is the only son of my mother's mother.' How is the man related to Rekha?
Solution
Rekha's mother's mother is her maternal grandmother. The man's only son of that grandmother is Rekha's maternal uncle (mama). He is not her father or brother.
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Untimed drills with the method shown after every question — the step between learning a topic and sitting it under a clock.
Analogy and classification
81 questions, instant feedback
Blood relations and direction sense
108 questions, instant feedback
Seating arrangement
93 questions, instant feedback
Coding, decoding and series
135 questions, instant feedback
Order and ranking
69 questions, instant feedback
Puzzles
99 questions, instant feedback
Syllogism and inequality
126 questions, instant feedback
Reasoning Ability shows up in every Rajasthan Jail Prahari mock test, in the same interface, with sectional locking and negative marking.
Rajasthan Jail Prahari: 16-question practice mock
16 questions | 16 min
Rajasthan Jail Prahari 2024 cycle (Advertisement No. 17/2024) sets 45 Reasoning Ability questions for 180 marks in the Written Examination.
Yes. Rajasthan Jail Prahari deducts one fourth of a mark for each wrong answer, Reasoning Ability included, so unsure guesses cost you. Each question carries 4 marks; 1 mark is deducted for every wrong answer. Unattempted questions carry no penalty. Minimum qualifying marks are 36%.
The Rajasthan Jail Prahari syllabus lists Analogies, classification and series, Coding-decoding, blood relations and direction sense, Logical and analytical reasoning, order and ranking, Non-verbal and figure-based reasoning at Class 10 level. Weight your revision towards the ones you are weakest on and confirm the emphasis against the paper analysis for recent cycles.
Every Reasoning Ability 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 Rajasthan Jail Prahari mock tests to sit it under a real clock with negative marking.