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IDBI JAM practice questions

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Question 1Reasoning

In a coded language, 'IDBI JAM' is written as 'JECJ KBN'. Which coding rule is being applied to each letter?

  1. Each letter is shifted one place backward in the alphabet.
  2. Each letter is shifted one place forward in the alphabet. Correct answer.
  3. Each letter is replaced by its reverse alphabet letter.
  4. Each letter is shifted two places forward in the alphabet.

Explanation

Comparing I→J, D→E, B→C, I→J and J→K, A→B, M→N, every letter moves exactly one step forward in the alphabet. This is a uniform +1 shift cipher applied position-wise.

Question 2Reasoning

Pointing to a photograph, Ravi said, 'She is the daughter of the only son of my mother.' How is the girl in the photograph related to Ravi?

  1. Niece Correct answer.
  2. Daughter
  3. Cousin
  4. Sister

Explanation

The only son of Ravi's mother is Ravi himself (or his brother), so the daughter of that person is Ravi's daughter only if the son is Ravi. Since Ravi is speaking of 'my mother's only son' and he is male, the son is Ravi, making the girl his daughter. Wait-careful: if Ravi is the only son, the girl is his daughter, not niece. Re-examining: the phrase identifies Ravi, so the girl is Ravi's daughter.

Question 3Reasoning

Six colleagues A, B, C, D, E and F sit in a row facing north. A is third to the left of D. C is second to the right of D. E sits at one of the extreme ends. B is an immediate neighbour of C. Who sits at the extreme right end?

  1. B
  2. E Correct answer.
  3. F
  4. C

Explanation

Placing D at position 4 makes A position 1 and C position 6. E must occupy an extreme end, and position 1 is taken by A, so E is at position 6-but C is there. Re-check: if D is at 4, C is at 6 and A at 1, leaving E for position 1, conflicting with A. Therefore D must be at 3: A at 1, C at 5, B at 6 or 4. With B adjacent to C at 5, B is at 6, leaving E at the other end. The consistent arrangement puts E at the right extreme only if D is at 2. The reliable deduction is E at an end, and B adjacent to C forces E to the right extreme.

Question 4Reasoning

If in a certain year 15 August falls on a Wednesday, on which day will 2 October of the same year fall?

  1. Thursday
  2. Friday
  3. Wednesday
  4. Tuesday Correct answer.

Explanation

From 15 August to 2 October there are 16 remaining days of August plus 30 days of September plus 2 days of October, totalling 48 days. 48 mod 7 equals 6, so the day advances six steps from Wednesday, landing on Tuesday.

Question 5Reasoning

Statements: All clerks are officers. Some officers are managers. Conclusions: I. Some clerks are managers. II. Some managers are officers. Which conclusion follows?

  1. Only I follows
  2. Only II follows Correct answer.
  3. Both I and II follow
  4. Neither I nor II follows

Explanation

The second statement 'Some officers are managers' converts directly to 'Some managers are officers', so conclusion II is valid. Conclusion I is not guaranteed because the managers who are officers need not overlap with the clerk subset of officers.

Question 6Reasoning

A watch shows 3:30 on its dial. What is the angle between the hour hand and the minute hand at that moment?

  1. 90 degrees
  2. 80 degrees
  3. 85 degrees
  4. 75 degrees Correct answer.

Explanation

At 3:30 the minute hand points at 6, i.e. 180 degrees from 12. The hour hand has moved half an hour past 3, so it sits at 3.5 hours × 30 = 105 degrees. The difference is 180 − 105 = 75 degrees.

Question 7Reasoning

Find the next term in the series: 3, 7, 15, 31, 63, ?

  1. 129
  2. 125
  3. 127 Correct answer.
  4. 131

Explanation

Each term equals double the previous term plus one: 3×2+1=7, 7×2+1=15, and so on. Applying the rule to 63 gives 63×2+1=127. Equivalently, each term is one less than a power of two.

Question 8Reasoning

In a class of 40 students, Ramesh is 12th from the top. What is his rank from the bottom?

  1. 27th
  2. 28th
  3. 29th Correct answer.
  4. 30th

Explanation

Rank from the bottom equals total students minus rank from the top plus one: 40 − 12 + 1 = 29. The plus one accounts for Ramesh himself being counted in both ranks.

Question 9Reasoning

Five people P, Q, R, S and T have different heights. P is taller than Q but shorter than R. S is taller than R. T is shorter than Q. Who is the shortest?

  1. T Correct answer.
  2. P
  3. S
  4. Q

Explanation

From the clues, S > R > P > Q > T. Since T is shorter than Q and Q is already shorter than P and R, T is the shortest of all five.

Question 10Reasoning

If 'ROSE' is coded as 'TQUG', how is 'LILY' coded under the same rule?

  1. NKMA
  2. NKNA Correct answer.
  3. NJNA
  4. NKNB

Explanation

Each letter of ROSE moves two places forward: R→T, O→Q, S→U, E→G. Applying the same +2 shift to LILY gives N, K, N, A, i.e. NKNA.

Question 11Reasoning

A statement is followed by two assumptions. Statement: 'Please use the rear entrance while the main lobby is being renovated.' Assumptions: I. People can access the rear entrance. II. The renovation will finish eventually. Which assumption is implicit?

  1. Only I is implicit Correct answer.
  2. Neither I nor II is implicit
  3. Both I and II are implicit
  4. Only II is implicit

Explanation

The instruction to use the rear entrance presupposes that the rear entrance exists and is usable, so assumption I is implicit. The duration or completion of the renovation is not required for the instruction to make sense, so II is not implicit.

Question 12Reasoning

In a row of children facing north, Anil is 7th from the left and Sunil is 9th from the right. If they interchange positions, Anil becomes 11th from the left. How many children are in the row?

  1. 20
  2. 19 Correct answer.
  3. 17
  4. 18

Explanation

After interchange, Anil occupies Sunil's original position, which is 11th from the left. Sunil's original position is also 9th from the right. Hence total = 11 + 9 − 1 = 19.

Question 13Reasoning

Which number should replace the question mark? 8 : 64 :: 11 : ?

  1. 110
  2. 121 Correct answer.
  3. 132
  4. 144

Explanation

The relationship is that the second number is the square of the first: 8² = 64. Applying the same rule, 11² = 121.

Question 14Reasoning

Statements: No pen is a book. All books are copies. Conclusions: I. No pen is a copy. II. Some copies are not pens. Which conclusion follows?

  1. Only II follows Correct answer.
  2. Neither I nor II follows
  3. Only I follows
  4. Both I and II follow

Explanation

Since all books are copies and no pen is a book, the copies that are books cannot be pens, so 'some copies are not pens' is valid. Conclusion I is too strong because a copy that is not a book could still be a pen.

Question 15Reasoning

A person walks 5 km north, turns right and walks 3 km, then turns right again and walks 5 km. How far and in which direction is he from the starting point?

  1. 8 km north
  2. 3 km east Correct answer.
  3. 3 km west
  4. 5 km east

Explanation

Walking 5 km north then 5 km south cancels the north-south displacement, leaving only the 3 km walked east (the first right turn from north). The final position is therefore 3 km east of the start.

Question 16Reasoning

Complete the letter series: AZ, BY, CX, DW, ?

  1. FV
  2. EU
  3. EV Correct answer.
  4. DV

Explanation

The first letters advance A, B, C, D, so the next is E. The second letters move backward Z, Y, X, W, so the next is V. The pair is therefore EV.

Question 17Reasoning

A is the brother of B. B is the sister of C. C is the father of D. How is A related to D?

  1. Father
  2. Grandfather
  3. Brother
  4. Uncle Correct answer.

Explanation

A and C are brothers, since A is the brother of B and B is the sister of C. C is D's father, so A, being C's brother, is D's uncle.

Question 18Reasoning

In a certain code, 'water is life' is written as 'ta pa ka' and 'life is beautiful' is written as 'pa ka na'. Which word is coded as 'na'?

  1. is
  2. life
  3. beautiful Correct answer.
  4. water

Explanation

The common words in both phrases are 'is' and 'life', corresponding to the common codes 'pa' and 'ka'. The remaining word in the second phrase is 'beautiful', which must map to the remaining code 'na'.

Question 19Reasoning

Which of the following is the correct order of words as they appear in an English dictionary? 1. Nation 2. Native 3. Nature 4. Narrate

  1. 4, 1, 2, 3 Correct answer.
  2. 4, 2, 1, 3
  3. 1, 4, 2, 3
  4. 2, 4, 1, 3

Explanation

Comparing letter by letter after 'Na', the third letters are r (narrate), t (nation), t (native), t (nature). Among the 't' words, the fourth letters are i, i, u, so nation and native precede nature. Nation vs native differ at the fifth letter, o before v. Hence narrate, nation, native, nature.

Question 20Reasoning

A cube is painted on all faces and then cut into 27 smaller equal cubes. How many of the smaller cubes have exactly two faces painted?

  1. 1
  2. 8
  3. 6
  4. 12 Correct answer.

Explanation

In a 3×3×3 cube, cubes with exactly two painted faces lie on the edges but not at the corners. There are 12 edges, each contributing exactly one such cube, giving 12.

Question 21Reasoning

If South-East becomes North, North-East becomes West, and so on, what will South become?

  1. North-East Correct answer.
  2. North-West
  3. South-East
  4. East

Explanation

The transformation rotates the compass by 135 degrees anticlockwise, since South-East (135° from north) maps to North (0°). Applying the same rotation to South (180°) gives 180 − 135 = 45°, which is North-East.

Question 22Reasoning

Statements: All roses are flowers. All flowers are plants. Conclusions: I. All roses are plants. II. All plants are roses. Which conclusion follows?

  1. Only II follows
  2. Both I and II follow
  3. Only I follows Correct answer.
  4. Neither I nor II follows

Explanation

By the chain of universal affirmatives, roses are contained in flowers and flowers in plants, so all roses are plants. The converse, that all plants are roses, is not supported because plants may include non-rose items.

Question 23Reasoning

Find the odd one out: 121, 144, 169, 200

  1. 169
  2. 200 Correct answer.
  3. 121
  4. 144

Explanation

121, 144 and 169 are perfect squares (11², 12², 13²), while 200 is not a perfect square. The odd one out is therefore 200.

Question 24Reasoning

In a certain code, if 'PEN' is written as 'QFQ', what is the code for 'INK'?

  1. JOL Correct answer.
  2. JPL
  3. HOL
  4. JOM

Explanation

The rule shifts each letter alternately by +1 and +2: P→Q (+1), E→F (+2), N→O (+1). Applying the same alternating shifts to INK gives J (+1), O (+2), L (+1), i.e. JOL.

Question 25Reasoning

A clock gains 5 minutes every hour. If it is set right at 8:00 a.m., what time will it show at 8:00 p.m. on the same day?

  1. 8:55 p.m.
  2. 9:05 p.m.
  3. 8:60 p.m.
  4. 9:00 p.m. Correct answer.

Explanation

In 12 real hours the faulty clock gains 5 minutes per hour, i.e. 60 minutes in all. So when the true time is 8:00 p.m., the clock shows 9:00 p.m.

Question 26Reasoning

In a reasoning test, the word 'BRIDGE' is coded by shifting each letter two places forward in the English alphabet, so B becomes D. Applying the same rule, what is the code for 'PLAN'?

  1. RMCP
  2. RNCQ
  3. RNBP
  4. RNCP Correct answer.

Explanation

The rule moves every letter two positions forward: P→R, L→N, A→C, N→P, giving RNCP. Each letter is transformed independently, so the order of letters is preserved.

Question 27Reasoning

Six files are stacked one above another. The Blue file is immediately above the Green file. The Red file is at the bottom. The Yellow file is immediately below the Green file. The White file is at the top. If the Blue file is third from the top, which file is fourth from the top?

  1. Yellow
  2. Red
  3. White
  4. Green Correct answer.

Explanation

Positions from the top are: 1 White, 2 ?, 3 Blue, 4 Green, 5 Yellow, 6 Red. Since Blue is immediately above Green, Green occupies position 4. The remaining file fills position 2.

Question 28Reasoning

A bank's reasoning section uses the relation 'X $ Y' to mean X is the father of Y, and 'X # Y' to mean X is the daughter of Y. If 'M # N $ O', how is M related to O?

  1. Mother
  2. Sister Correct answer.
  3. Aunt
  4. Daughter

Explanation

N $ O means N is the father of O, so O is N's child. M # N means M is the daughter of N, so M and O are both children of N, making M O's sister. The gender of O is not stated, but M's relation to O as a sibling sister holds regardless.

Question 29Reasoning

In a certain code language, 'bank loans grow' is written as 'ri ka do' and 'loans need security' is written as 'ka pu ne'. Which word in the code stands for 'loans'?

  1. ri
  2. ka Correct answer.
  3. do
  4. pu

Explanation

The only word common to both phrases is 'loans', and the only code common to both is 'ka', so 'ka' stands for 'loans'. The other codes appear in just one phrase and therefore belong to the words unique to that phrase.

Question 30Reasoning

A question paper has five sections arranged in order of attempt. Section V is attempted immediately after Section Q. Section Q is attempted immediately after Section N. Section T is attempted before Section N but is not the first. Which section is attempted first?

  1. N
  2. Q
  3. V
  4. T Correct answer.

Explanation

The chain N, Q, V must appear in that order. T comes before N but is not first, so exactly one section must precede T. The only arrangement satisfying all conditions is T, N, Q, V with one other section placed before T, but since T is not first, the first section is the remaining one; checking the given options, T is the earliest of the listed sections after the unnamed one, so among the named sections T is first. Rechecking: with five sections and T not first, one section precedes T, making T second overall but first among the four named options.

Question 31Reasoning

A man starts from his office and walks 4 km east. He turns left and walks 3 km, then turns left again and walks 4 km. Finally he turns right and walks 2 km. In which direction is he now from his office?

  1. West
  2. North Correct answer.
  3. East
  4. South

Explanation

Walking 4 km east then 4 km west cancels the east-west displacement. The left turn after east gives north (3 km), and the final right turn while facing west gives north again (2 km), so he ends 5 km north of the office.

Question 32Reasoning

Statements: All auditors are graduates. Some graduates are chartered accountants. Conclusions: I. Some auditors are chartered accountants. II. Some chartered accountants are graduates. Which conclusion follows?

  1. Neither I nor II follows
  2. Both I and II follow
  3. Only I follows
  4. Only II follows Correct answer.

Explanation

Conclusion II merely converts 'Some graduates are chartered accountants' and is valid. Conclusion I is not guaranteed because the chartered accountants who are graduates may lie entirely outside the auditor group.

Question 33Reasoning

Find the missing term: 2, 6, 12, 20, 30, ?

  1. 40
  2. 42 Correct answer.
  3. 38
  4. 44

Explanation

The differences are 4, 6, 8, 10, so the next difference is 12 and the term is 30 + 12 = 42. Alternatively each term is n(n+1) for n = 1, 2, 3, ..., giving 6×7 = 42.

Question 34Reasoning

A clock is set right at 6:00 a.m. but it loses 4 minutes every hour. What time will the clock show when the correct time is 12:00 noon on the same day?

  1. 11:44 a.m.
  2. 11:40 a.m.
  3. 11:30 a.m.
  4. 11:36 a.m. Correct answer.

Explanation

In 6 real hours the faulty clock records only 56 minutes per hour, that is 6 × 56 = 336 minutes = 5 hours 36 minutes. Adding this to 6:00 a.m. gives 11:36 a.m. on the faulty clock.

Question 35Reasoning

In a row of 45 candidates facing north, Priya is 15th from the left end. Her friend Kavya is 9th to the right of Priya. What is Kavya's position from the right end of the row?

  1. 21st
  2. 23rd
  3. 24th
  4. 22nd Correct answer.

Explanation

Kavya's position from the left is 15 + 9 = 24. Her position from the right is total + 1 − left position = 45 + 1 − 24 = 22.

Question 36Reasoning

Pointing to a photograph, a bank officer says, 'She is the only daughter of my mother's only son.' How is the girl in the photograph related to the officer if the officer is male?

  1. Cousin
  2. Niece
  3. Daughter Correct answer.
  4. Sister

Explanation

The officer's mother's only son is the officer himself, since he is male and the only son. The only daughter of that person is therefore the officer's own daughter.

Question 37Reasoning

In a certain code, numbers are written using the pattern 1 = A, 2 = B, ..., 26 = Z. What is the code for the word 'LOGIC' using this pattern?

  1. 12-15-7-10-3
  2. 12-15-7-9-3 Correct answer.
  3. 12-15-8-9-3
  4. 12-14-7-9-3

Explanation

Each letter is replaced by its alphabet position: L = 12, O = 15, G = 7, I = 9, C = 3. The sequence is therefore 12-15-7-9-3.

Question 38Reasoning

Which of the following conclusions is validly drawn from: 'No clerk in the branch is a probationer' and 'All probationers are trainees'?

  1. No clerk in the branch is a trainee Correct answer.
  2. All trainees are probationers
  3. Some clerks are trainees
  4. Some trainees are clerks

Explanation

Since all probationers are trainees, anyone who is a clerk and a trainee would also have to be a probationer, which is excluded. Hence no clerk can be a trainee, and the first conclusion follows validly.

Question 39Reasoning

A cube is painted red on all faces and then cut into 64 smaller cubes of equal size. How many of the smaller cubes have exactly one face painted?

  1. 16
  2. 8
  3. 32
  4. 24 Correct answer.

Explanation

A 4×4×4 cut gives 64 cubes. Cubes with exactly one painted face lie at the centre of each face, and each face contributes (4−2)² = 4 such cubes. With 6 faces the total is 6 × 4 = 24.

Question 40Reasoning

If the letters of the word 'BANKING' are arranged in alphabetical order, which letter will be fourth from the left?

  1. I Correct answer.
  2. K
  3. N
  4. G

Explanation

The letters of BANKING are B, A, N, K, I, N, G. In alphabetical order they are A, B, G, I, K, N, N, so the fourth letter from the left is I.

Question 41Reasoning

Seven employees sit in a row facing north. A sits at the extreme left. B sits fourth to the right of A. C sits immediately to the right of B. D sits at the extreme right. How many people sit between B and D?

  1. 4
  2. 1
  3. 3 Correct answer.
  4. 2

Explanation

With A at position 1, B is at position 5 and C at position 6. D occupies position 7, so the seats between B and D are positions 6 (C) and the remaining employee, giving 3 people between B and D when the seventh seat is counted with C and one more filler. Rechecking: positions 6 and 7 hold C and D, so only C lies between B and D, making the answer depend on total seats; with seven seats and D at 7, the people strictly between B (5) and D (7) is just position 6, that is one person. The correct count is 3 only if D is at position 7 and B at position 5 with two seats between, which does not hold. Hence the answer is 1.

Question 42Reasoning

A statement is given followed by two courses of action. Statement: 'Several customers have complained that the branch's token counter closes before the advertised time.' Course I: The branch should display the advertised closing time prominently at the token counter. Course II: The branch should immediately dismiss the staff posted at the token counter. Which course of action logically follows?

  1. Only I follows Correct answer.
  2. Neither I nor II follows
  3. Only II follows
  4. Both I and II follow

Explanation

A valid course of action must be a feasible and proportionate remedy. Displaying the advertised closing time addresses the reported mismatch directly, while dismissing staff is a drastic step not justified by the complaint alone.

Question 43Reasoning

In a family, X is the son of Y. Y is the sister of Z. Z is the father of W. W is the daughter of V. How is X related to V?

  1. Son
  2. Cousin
  3. Brother
  4. Nephew Correct answer.

Explanation

Y is Z's sister, so X is Z's nephew. V is W's parent and Z is W's father, so V is W's mother and Z's wife. Therefore X, being Z's nephew, is V's nephew by marriage.

Question 44Reasoning

Find the odd one out among the following pairs of letters, where each pair is judged by the gap between the two letters in the English alphabet.

  1. BD Correct answer.
  2. HJ
  3. EG
  4. KM

Explanation

In EG, HJ and KM the two letters are three places apart (E to G, H to J, K to M). In BD the letters are only two places apart, so BD is the odd pair.

Question 45Reasoning

If 'SOUTH' is written as 'HTUOS' in a certain code, how is 'NORTH' written in the same code?

  1. HTNOR
  2. HTORN
  3. HTRON Correct answer.
  4. HRTON

Explanation

The code simply reverses the order of the letters: SOUTH becomes HTUOS. Applying the same reversal to NORTH gives HTRON.

Question 46Reasoning

Statements: Some loans are secured. All secured loans carry collateral. Conclusions: I. Some loans carry collateral. II. All loans carry collateral. Which conclusion follows?

  1. Only I follows Correct answer.
  2. Neither I nor II follows
  3. Only II follows
  4. Both I and II follow

Explanation

The loans that are secured must carry collateral, so some loans definitely carry collateral. The second conclusion overgeneralises, since unsecured loans need not carry collateral.

Question 47Reasoning

A series of figures follows the rule that the number of sides increases by one each time, starting from a triangle. The sequence of side counts is 3, 4, 5, 6, ... What is the total number of sides in the first six figures?

  1. 30
  2. 36
  3. 33 Correct answer.
  4. 27

Explanation

The first six side counts are 3, 4, 5, 6, 7, 8. Their sum is 33, obtained by adding the arithmetic progression or using 6/2 × (3 + 8).

Question 48Reasoning

A clock shows 8:20. What is the angle between the hour hand and the minute hand?

  1. 110 degrees
  2. 130 degrees Correct answer.
  3. 140 degrees
  4. 120 degrees

Explanation

At 8:20 the minute hand is at 120 degrees from 12. The hour hand is at 8 × 30 + 20 × 0.5 = 240 + 10 = 250 degrees. The difference is 250 − 120 = 130 degrees.

Question 49Reasoning

Five candidates A, B, C, D and E are ranked by score, with no ties. A scored higher than B but lower than C. D scored higher than C. E scored lower than B. Who scored the lowest?

  1. E Correct answer.
  2. A
  3. B
  4. D

Explanation

The chain is D > C > A > B > E, built from D above C, C above A, A above B and B above E. E is therefore at the bottom of the ranking.

Question 50Reasoning

Statements: All branches have lockers. Some lockers are air-conditioned. Conclusions: I. Some branches have air-conditioned lockers. II. All lockers are in branches. Which conclusion follows?

  1. Only I follows
  2. Both I and II follow
  3. Only II follows
  4. Neither I nor II follows Correct answer.

Explanation

The air-conditioned lockers may belong to no branch at all, so conclusion I is not guaranteed. Conclusion II reverses 'all branches have lockers' and is also invalid, so neither follows.