RRB Clerk Reasoning Mock Test - Office Assistant Prelims
40 original Reasoning Ability MCQs for IBPS RRB Clerk / Office Assistant prelims practice. Covers puzzles, seating arrangement, syllogism, inequalities, coding-decoding, blood relations, direction sense, ranking, and series. No login required.
Preview all 40 questions in RRB Clerk Reasoning Mock Test - Office Assistant Prelims (no login required)
- Reasoning Ability — Seating Arrangement
1. Six friends P, Q, R, S, T and U sit in a straight line facing north. P is second to the left of T. Q is at one end. R sits immediately right of Q. S is not adjacent to T. If Q is at the left end, who sits at the right end?
- A. P
- B. S
- C. T (Correct)
- D. U
Explanation: Q and R occupy positions 1 and 2. To keep P second left of T and S not adjacent to T, the order is Q-R-S-P-U-T. So T is at the right end.
- Reasoning Ability — Seating Arrangement
2. Six people A, B, C, D, E and F sit around a circular table facing the centre. B is second to the right of A. C is immediate left of B. D is opposite A. E is immediate right of D. Who is opposite C?
- A. B
- B. D
- C. E (Correct)
- D. F
Explanation: Placing A first gives C and B beside it as per the clues, D opposite A, and E immediately right of D. E sits opposite C.
- Reasoning Ability — Puzzle
3. Five boxes A, B, C, D and E are stacked one above another. A is above C but below B. D is immediately above E. C is not at the bottom. Which box is at the top?
- A. A
- B. B (Correct)
- C. D
- D. Cannot be determined
Explanation: A is below B and above C. Since C is not bottom, C must be fourth and E fifth; D is immediately above E. The only top box is B.
- Reasoning Ability — Puzzle
4. Seven people take exams from Monday to Sunday. M takes the exam two days before N. O takes it immediately after P. Q takes it on Friday. R takes it before M. S takes it after N. If P takes the exam on Tuesday, who takes it on Wednesday?
- A. M
- B. N
- C. O (Correct)
- D. R
Explanation: P is Tuesday, so O is Wednesday. Q is Friday. The remaining conditions can be satisfied around these fixed days.
- Reasoning Ability — Syllogism
5. Statements: All books are papers. Some papers are files. Conclusions: I. Some books are files. II. Some papers are books.
- A. Only I follows
- B. Only II follows (Correct)
- C. Both follow
- D. Neither follows
Explanation: All books being papers guarantees that some papers are books. No direct relation between books and files is definite.
- Reasoning Ability — Syllogism
6. Statements: No pen is a pencil. All pencils are erasers. Conclusions: I. No pen is an eraser. II. Some erasers are pencils.
- A. Only I follows
- B. Only II follows (Correct)
- C. Both follow
- D. Neither follows
Explanation: All pencils are erasers, so some erasers are pencils. Pens may or may not overlap with erasers, so I does not follow.
- Reasoning Ability — Inequality
7. If A >= B > C = D <= E, which conclusion is definitely true?
- A. A > D
- B. E > C
- C. B > D (Correct)
- D. A = E
Explanation: B > C and C = D, therefore B > D is definitely true. The other relations are not fixed.
- Reasoning Ability — Inequality
8. If P T, which of the following is definitely false?
- A. P < S
- B. T < R
- C. Q > T
- D. S < P (Correct)
Explanation: P < Q <= R = S, so P < S. Therefore S < P is definitely false.
- Reasoning Ability — Coding-Decoding
9. In a code, BANK is written as DCQM. How will LOAN be written in the same code?
- A. NQCP (Correct)
- B. MPCO
- C. NQBO
- D. OPCQ
Explanation: Each letter is shifted two positions forward: L->N, O->Q, A->C, N->P.
- Reasoning Ability — Coding-Decoding
10. In a code, MARKET is written as NCTMGU. How will CREDIT be written?
- A. DSGFKV (Correct)
- B. DSGFKU
- C. EQGFKV
- D. DSHEKV
Explanation: Letters are shifted alternately +1, +2, +3, +4, +5, +6. CREDIT becomes D S G F K V.
- Reasoning Ability — Blood Relations
11. Pointing to Ravi, Neha says, 'He is the son of my mother's only son.' How is Ravi related to Neha?
- A. Brother
- B. Son
- C. Nephew (Correct)
- D. Father
Explanation: Neha's mother's only son is Neha's brother. Ravi is the son of Neha's brother, so Ravi is Neha's nephew.
- Reasoning Ability — Blood Relations
12. A is the father of B. C is the sister of B. D is the mother of A. How is D related to C?
- A. Mother
- B. Grandmother (Correct)
- C. Aunt
- D. Sister
Explanation: A is parent of C because C is B's sister. D is A's mother, so D is C's grandmother.
- Reasoning Ability — Direction Sense
13. A person walks 8 m north, turns right and walks 6 m, then turns right and walks 8 m. How far is he from the starting point?
- A. 4 m
- B. 6 m (Correct)
- C. 8 m
- D. 14 m
Explanation: The north and south movements cancel. He ends 6 m east of the starting point.
- Reasoning Ability — Direction Sense
14. Meena walks 5 m east, turns left and walks 12 m, then turns left and walks 5 m. In which direction is she from the starting point?
- A. North (Correct)
- B. South
- C. East
- D. West
Explanation: The east and west movements cancel. She remains 12 m north of the start.
- Reasoning Ability — Alphanumeric Series
15. Find the next term: B3, D6, F12, H24, ?
- A. J48 (Correct)
- B. I48
- C. J36
- D. K48
Explanation: Letters skip one place: B, D, F, H, J. Numbers double: 3, 6, 12, 24, 48.
- Reasoning Ability — Alphanumeric Series
16. In the series A1C, D4F, G9I, J16L, what comes next?
- A. M25O (Correct)
- B. N25P
- C. M20O
- D. L25N
Explanation: First letters move +3, middle numbers are squares 1, 4, 9, 16, 25, and last letters are two places after the first letter.
- Reasoning Ability — Number Series
17. Find the missing number: 4, 9, 19, 39, 79, ?
- A. 119
- B. 149
- C. 159 (Correct)
- D. 169
Explanation: Each term is previous term x 2 + 1: 4->9->19->39->79->159.
- Reasoning Ability — Number Series
18. Find the missing number: 2, 6, 12, 20, 30, ?
- A. 40
- B. 42 (Correct)
- C. 44
- D. 48
Explanation: Differences are 4, 6, 8, 10, 12. So 30 + 12 = 42.
- Reasoning Ability — Order and Ranking
19. In a class, Aman is 12th from the top and 18th from the bottom. How many students are there in the class?
- A. 28
- B. 29 (Correct)
- C. 30
- D. 31
Explanation: Total = 12 + 18 - 1 = 29.
- Reasoning Ability — Order and Ranking
20. Rita ranks 9th from the left and 14th from the right in a row. How many people are in the row?
- A. 21
- B. 22 (Correct)
- C. 23
- D. 24
Explanation: Total people = 9 + 14 - 1 = 22.
- Reasoning Ability — Input-Output
21. Input: '82 loan 37 bank 54 cash 19'. Step 1 moves the smallest number to the front. Step 2 moves the alphabetically first word after it. What will be the first two elements after Step 2?
- A. 19 bank (Correct)
- B. 19 cash
- C. 37 bank
- D. 82 loan
Explanation: The smallest number is 19. Among words bank, cash, loan, the alphabetically first word is bank.
- Reasoning Ability — Input-Output
22. A machine arranges numbers in descending order from left to right, one number per step. Input: 45 18 72 36 54. What is Step 2?
- A. 72 54 45 18 36 (Correct)
- B. 72 54 18 36 45
- C. 72 45 18 36 54
- D. 54 72 45 18 36
Explanation: Step 1 places 72 first. Step 2 places the next largest, 54, second while keeping remaining order: 72 54 45 18 36.
- Reasoning Ability — Data Sufficiency
23. Question: Is X older than Y? Statement I: X is older than Z. Statement II: Z is older than Y.
- A. Only I is sufficient
- B. Only II is sufficient
- C. Both together are sufficient (Correct)
- D. Even both are not sufficient
Explanation: Together, X > Z and Z > Y, so X > Y. Individually neither statement compares X and Y fully.
- Reasoning Ability — Data Sufficiency
24. Question: What is the code for 'money'? Statement I: 'money bank loan' is coded as 'pa ta ra'. Statement II: 'bank cash money' is coded as 'ta la pa'.
- A. Only I is sufficient
- B. Only II is sufficient
- C. Both together are sufficient
- D. Even both are not sufficient (Correct)
Explanation: Common words money and bank correspond to common codes pa and ta, but which code is money cannot be fixed.
- Reasoning Ability — Odd One Out
25. Find the odd one out: SBI, PNB, Canara Bank, LIC
- A. SBI
- B. PNB
- C. Canara Bank
- D. LIC (Correct)
Explanation: SBI, PNB and Canara Bank are banks; LIC is an insurance company.
- Reasoning Ability — Analogy
26. Branch is related to Bank in the same way as Ward is related to:
- A. Hospital (Correct)
- B. Market
- C. Court
- D. Library
Explanation: A branch is a unit/part of a bank; a ward is a unit/part of a hospital.
- Reasoning Ability — Statement and Assumption
27. Statement: The bank has asked customers not to share OTPs with anyone. Assumption I: Fraud may happen if OTPs are shared. Assumption II: Customers can receive OTPs.
- A. Only I is implicit
- B. Only II is implicit
- C. Both are implicit (Correct)
- D. Neither is implicit
Explanation: The warning assumes OTP sharing can cause fraud and that customers are receiving OTPs in the first place.
- Reasoning Ability — Statement and Conclusion
28. Statement: All candidates who cleared prelims will be allowed to appear in mains. Rohan cleared prelims. Conclusion: Rohan will be allowed to appear in mains.
- A. Conclusion follows (Correct)
- B. Conclusion does not follow
- C. Cannot be determined
- D. Only partially follows
Explanation: Rohan belongs to the group of candidates who cleared prelims, so the stated rule applies to him.
- Reasoning Ability — Puzzles
29. Four people A, B, C and D live on floors 1 to 4 from bottom to top. B lives above A. C lives below D. A does not live on floor 1. Who lives on floor 4?
- A. B
- B. C
- C. D
- D. Cannot be determined (Correct)
Explanation: A can be on floor 2 and B on floor 3 or 4, while C and D can fit in more than one way. The top floor is not fixed.
- Reasoning Ability — Puzzles
30. Six students have different ranks from 1 to 6. K is just above L. M is below N. O is rank 1. P is below L. If K is rank 3, what is L's rank?
- A. 2
- B. 4 (Correct)
- C. 5
- D. 6
Explanation: K is just above L. If K is rank 3, L must be rank 4.
- Reasoning Ability — Alphabet Test
31. If the English alphabet is written in reverse order, which letter will be 10th to the right of the 15th letter from the left?
- A. B (Correct)
- B. C
- C. D
- D. E
Explanation: In reverse order, the 15th letter from the left is L. Ten to its right is B.
- Reasoning Ability — Alphabet Test
32. How many pairs of letters are there in the word CREDIT which have as many letters between them in the word as in the English alphabet?
- A. 1
- B. 2 (Correct)
- C. 3
- D. 4
Explanation: The valid pairs are C-E and D-E when checked by positional gaps in the word and alphabet.
- Reasoning Ability — Syllogism
33. Statements: Some accounts are loans. All loans are deposits. No deposit is cash. Conclusion I: Some accounts are deposits. Conclusion II: No loan is cash.
- A. Only I follows
- B. Only II follows
- C. Both follow (Correct)
- D. Neither follows
Explanation: Some accounts are loans and all loans are deposits, so some accounts are deposits. Since no deposit is cash and all loans are deposits, no loan is cash.
- Reasoning Ability — Coding-Decoding
34. If 'red blue green' means '12 15 18' and 'green white red' means '18 22 12', what is the code for blue?
- A. 12
- B. 15 (Correct)
- C. 18
- D. 22
Explanation: Common words fix red = 12 and green = 18, leaving blue = 15.
- Reasoning Ability — Inequality
35. If A > B >= C < D = E, which relation is definitely true?
- A. A > C (Correct)
- B. E > C
- C. D > B
- D. A > E
Explanation: A > B and B >= C, therefore A > C. D and E are greater than C, but their relation with B or A is not fixed.
- Reasoning Ability — Direction Sense
36. A man walks 10 m south, turns left and walks 24 m, then turns left and walks 10 m. What is the shortest distance from his starting point?
- A. 10 m
- B. 14 m
- C. 24 m (Correct)
- D. 34 m
Explanation: South and north movements cancel. He is 24 m east of the starting point.
- Reasoning Ability — Seating Arrangement
37. Five people A, B, C, D and E sit in a row facing south. A is immediate right of B. C is at the right end. D is between A and E. E is not adjacent to C. Who is in the middle?
- A. A (Correct)
- B. B
- C. D
- D. E
Explanation: For people facing south, immediate right appears to the viewer's left. The only arrangement is E-D-A-B-C, so A is in the middle.
- Reasoning Ability — Ranking
38. Among five persons, V is taller than W but shorter than X. Y is taller than X. Z is shorter than W. Who is the tallest?
- A. V
- B. X
- C. Y (Correct)
- D. Cannot be determined
Explanation: Y > X > V > W > Z, so Y is tallest.
- Reasoning Ability — Series
39. Find the missing term: AZ, BY, CX, DW, ?
- A. EV (Correct)
- B. EU
- C. FV
- D. EW
Explanation: First letters move forward A, B, C, D, E and second letters move backward Z, Y, X, W, V.
- Reasoning Ability — Miscellaneous Reasoning
40. If 64 is related to 8 and 121 is related to 11, then 169 is related to:
- A. 12
- B. 13 (Correct)
- C. 14
- D. 15
Explanation: The relation is square to square root: 64->8, 121->11, 169->13.