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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.

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Reasoning Ability (40Q)
Instructions: Each correct answer earns +2 marks. Each wrong answer deducts −0.5 marks. Unattempted questions carry 0 marks. You can navigate between questions freely.
Preview all 40 questions in RRB Clerk Reasoning Mock Test - Office Assistant Prelims (no login required)
  1. 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.

  2. 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.

  3. 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.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. 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.

  9. 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.

  10. 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.

  11. 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.

  12. 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.

  13. 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.

  14. 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.

  15. 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.

  16. 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.

  17. 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.

  18. 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.

  19. 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.

  20. 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.

  21. 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.

  22. 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.

  23. 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.

  24. 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.

  25. 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.

  26. 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.

  27. 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.

  28. 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.

  29. 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.

  30. 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.

  31. 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.

  32. 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.

  33. 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.

  34. 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.

  35. 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.

  36. 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.

  37. 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.

  38. 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.

  39. 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.

  40. 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.