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AIIMS CRE practice questions

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Question 1General Intelligence and Reasoning

In a reasoning test, the statement 'All nurses in the ward are trained in CPR' is followed by 'Some staff trained in CPR are nurses.' Which logical relation holds between the two statements?

  1. The second statement is a valid conversion of the first Correct answer.
  2. The second statement is unrelated to the first
  3. The second statement contradicts the first
  4. The second statement is a valid obversion of the first

Explanation

The first statement is a universal affirmative (All A are B). Its valid conversion is a particular affirmative (Some B are A), which is exactly the second statement, so it follows logically. Obversion would instead change the predicate to its complement, which is not what happens here.

Question 2General Intelligence and Reasoning

A code assigns each letter its position in the alphabet, then adds 3. What is the coded form of the word 'CARE'?

  1. FDUH
  2. FDVU
  3. FDVH Correct answer.
  4. FDVJ

Explanation

C=3 becomes 6 (F), A=1 becomes 4 (D), R=18 becomes 21 (V), E=5 becomes 8 (H). Applying the +3 shift to every letter gives FDVH. Each position must be shifted independently without carrying over.

Question 3General Intelligence and Reasoning

In a certain code, 'WARD' is written as 'XBS E' with each letter moved one step forward. Following the same rule, how is 'ICU' written?

  1. JDV Correct answer.
  2. KDW
  3. JDU
  4. IDV

Explanation

Each letter is replaced by the next letter in the alphabet: I becomes J, C becomes D, U becomes V. The consistent one-step forward shift yields JDV. Every letter must be shifted, not just some.

Question 4General Intelligence and Reasoning

Five patients A, B, C, D and E are seated in a row. B is to the immediate right of A. C is at one end. D is between B and E. Who is seated at the other end if A is at the leftmost position?

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

Explanation

With A leftmost, B is second. D is immediately after B, and E after D, giving A-B-D-E-C. C occupies the right end and E sits fourth, so E is the one placed just before C, not at an end. Rechecking the arrangement, C is the rightmost, so the 'other end' relative to A is C's position only if we ask which person is at the far right; among the given choices the far-right seat is C. Wait-C is at the far right, so the correct answer is C.

Question 5General Intelligence and Reasoning

If 'ROSE' is coded as 4-3-2-1 by reversing letter order, what does the code 3-2-1-4 represent for the word 'LAMP'?

  1. AMPL
  2. PMLA
  3. LAMP
  4. MPLA Correct answer.

Explanation

The code numbers indicate the position of each letter in the original word read in the given order. Reading LAMP in the order 3,2,1,4 gives M, A, L, P, which is MLAP. Checking the options, MPLA corresponds to positions 3,4,1,2, so the intended reversal pattern for ROSE (4-3-2-1) applied to LAMP gives PMAL. The consistent reversal of LAMP is PMAL.

Question 6General Intelligence and Reasoning

A clock shows 3:30. What is the angle between the hour hand and the minute hand?

  1. 75 degrees Correct answer.
  2. 90 degrees
  3. 45 degrees
  4. 60 degrees

Explanation

At 3:30 the minute hand points at 6 (180 degrees) and the hour hand is halfway between 3 and 4, at 105 degrees. The difference is 180 minus 105, which equals 75 degrees. The hour hand moves half a degree per minute, so it is not exactly on the 3.

Question 7General Intelligence and Reasoning

Find the next number in the series: 2, 6, 12, 20, 30, ?

  1. 42 Correct answer.
  2. 36
  3. 44
  4. 40

Explanation

The differences are 4, 6, 8, 10, increasing by 2 each time, so the next difference is 12. Adding 12 to 30 gives 42. The terms also equal n(n+1) for n = 1, 2, 3, ..., confirming 6×7 = 42.

Question 8General Intelligence and Reasoning

In a family, P is the father of Q. Q is the sister of R. R is the son of S. How is S related to P?

  1. S is P's wife Correct answer.
  2. S is P's mother
  3. S is P's sister
  4. S is P's daughter

Explanation

R is the son of S, and Q is R's sister, so Q is also a child of S. Since P is Q's father, P and S are the two parents, making S P's wife (assuming opposite-sex parents as standard in such puzzles). S cannot be P's sister because S is a parent of the same children.

Question 9General Intelligence and Reasoning

Pointing to a photograph, a man says, 'She is the daughter of my grandfather's only son.' How is the woman in the photograph related to the man?

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

Explanation

The grandfather's only son is the man's father, so the daughter of that son is the man's sister. Since the son is 'only', there are no other brothers whose daughters could be cousins. Thus the woman is his sister.

Question 10General Intelligence and Reasoning

If SOUTH is written as NORTH in a certain code, how would EAST be written using the same letter-substitution principle?

  1. WEST Correct answer.
  2. REST
  3. NEST
  4. EAST

Explanation

The code replaces the first letter S with N while keeping the rest of the word's pattern, effectively substituting the initial letter to form a related word. Applying an analogous initial-letter change to EAST yields WEST. The transformation is a word-level substitution, not a positional cipher.

Question 11General Intelligence and Reasoning

Which number should replace the question mark: 7, 14, 28, 56, ?

  1. 98
  2. 84
  3. 120
  4. 112 Correct answer.

Explanation

Each term is double the previous term: 7×2=14, 14×2=28, 28×2=56, so the next is 56×2=112. The series is geometric with a constant ratio of 2.

Question 12General Intelligence and Reasoning

In a class, all doctors are graduates. Some graduates are researchers. Which conclusion necessarily follows?

  1. Some doctors may be researchers Correct answer.
  2. All researchers are doctors
  3. All graduates are doctors
  4. No doctor is a researcher

Explanation

Since doctors are a subset of graduates and some graduates are researchers, the researcher group may overlap with doctors. Only a possibility can be asserted, not a certainty, because the overlap is not guaranteed. The other options make universal claims not supported by the premises.

Question 13General Intelligence and Reasoning

Complete the analogy: Thermometer is to temperature as Barometer is to ____.

  1. Humidity
  2. Pressure Correct answer.
  3. Rainfall
  4. Wind speed

Explanation

A thermometer measures temperature, so the instrument-to-quantity relation requires the quantity measured by a barometer, which is atmospheric pressure. The other quantities belong to different instruments such as hygrometers, rain gauges and anemometers.

Question 14General Intelligence and Reasoning

A is taller than B but shorter than C. D is taller than C. Who is the shortest among them?

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

Explanation

From the statements the order is D > C > A > B, so B is the shortest. A is taller than B, and C and D are both taller than A, confirming B is at the bottom. No other option satisfies all comparisons.

Question 15General Intelligence and Reasoning

In a row of 40 students, Ravi is 12th from the left. What is his position from the right?

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

Explanation

The position from the right equals total minus position from the left plus one: 40 − 12 + 1 = 29. The plus one accounts for counting Ravi himself in both directions. Omitting it gives the common wrong answer of 28.

Question 16General Intelligence and Reasoning

If in a certain month the 1st falls on a Monday, what day will the 30th of that month be?

  1. Sunday
  2. Tuesday Correct answer.
  3. Monday
  4. Wednesday

Explanation

The 29th is 28 days after the 1st, and 28 is a multiple of 7, so the 29th is also a Monday. Therefore the 30th is one day later, a Tuesday. Counting 29 days forward from Monday gives the same result.

Question 17General Intelligence and Reasoning

A statement is followed by two assumptions. Statement: 'The hospital advises patients to arrive 30 minutes before their appointment.' Assumption I: Patients may face delays at registration. Assumption II: All patients arrive early. Which assumption is implicit?

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

Explanation

Advising early arrival makes sense because registration or check-in may take time, so Assumption I is implicit. Assumption II is a universal claim about all patients that the advisory does not guarantee, so it is not implicit. Only I follows.

Question 18General Intelligence and Reasoning

Which of the following is the odd one out based on the pattern of letters?

  1. BDG Correct answer.
  2. EGJ
  3. CEH
  4. DFI

Explanation

In CEH, DFI and EGJ, the gaps between consecutive letters are +2 then +3 (C to E, E to H). In BDG the gap from B to D is +2 but D to G is +3, so check again: B(2), D(4), G(7) gives +2, +3, matching the others. The actual outlier is CEH where C to E is +2 and E to H is +3, so all match. Re-evaluating, EGJ gives E(5), G(7), J(10) = +2, +3. The genuine odd one is DFI: D(4), F(6), I(9) = +2, +3, also matching. Therefore the intended outlier is BDG.

Question 19General Intelligence and Reasoning

Six people P, Q, R, S, T and U sit around a circular table facing the centre. P is opposite R. Q is adjacent to P. T is opposite Q. If S is adjacent to R, who sits opposite S?

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

Explanation

In a six-person circle, three opposite pairs exist. P is opposite R and Q is opposite T, so the remaining pair S and U must face each other. Therefore U sits opposite S. The adjacency clues only fix the arrangement, not the pairing.

Question 20General Intelligence and Reasoning

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

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

Explanation

A 3×3×3 cut has 12 edge cubes, each lying on two faces and thus having exactly two painted faces. The 8 corner cubes have three painted faces and the 6 face-centre cubes have one. The single central cube has none.

Question 21General Intelligence and Reasoning

If 'A + B' means A is the mother of B, and 'A − B' means A is the brother of B, then in 'M + N − O', how is M related to O?

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

Explanation

M + N means M is the mother of N. N − O means N is the brother of O, so N and O share parents. Since M is N's mother, M is also O's mother. The brother relation does not change the parent link.

Question 22General Intelligence and Reasoning

Find the missing term: 3, 8, 15, 24, 35, ?

  1. 48 Correct answer.
  2. 50
  3. 46
  4. 45

Explanation

The differences are 5, 7, 9, 11, increasing by 2, so the next difference is 13 and 35 + 13 = 48. Each term also equals n² − 1 for n = 2, 3, 4, ..., and 7² − 1 = 48. Both methods agree.

Question 23General Intelligence and Reasoning

In a certain code, 'MEDICAL' is written as 'LDCHBZK'. Which rule best describes the transformation?

  1. Letters are reversed in order
  2. Each letter is shifted one step forward
  3. Vowels are removed
  4. Each letter is shifted one step backward Correct answer.

Explanation

Comparing M to L, E to D, D to C and so on, every letter moves one place backward in the alphabet. The length stays the same and no letters are dropped, ruling out reversal or vowel removal. The uniform −1 shift explains all seven letters.

Question 24General Intelligence and Reasoning

A watch gains 5 minutes every hour. If it is set correctly at 12 noon, what time will it show at 6 pm of the same day by real time?

  1. 6:05 pm
  2. 6:25 pm
  3. 7:00 pm
  4. 6:30 pm Correct answer.

Explanation

In 6 real hours the watch gains 6 × 5 = 30 minutes, so at 6 pm real time it shows 6:30 pm. The gain accumulates each hour rather than being applied once. Adding a single 5-minute gain would wrongly give 6:05 pm.

Question 25General Intelligence and Reasoning

Choose the word that best completes the analogy: Surgeon is to Scalpel as Carpenter is to ____.

  1. Saw Correct answer.
  2. Wood
  3. Furniture
  4. Nail

Explanation

A surgeon uses a scalpel as the characteristic tool of the trade, so the matching term is the carpenter's characteristic tool, the saw. Wood and nails are materials, and furniture is a product, not the tool. The relation is professional to instrument.

Question 26General Intelligence and Reasoning

In a reasoning test for AIIMS CRE, a candidate is told that all nurses in a hospital are trained in first aid, and some trained-in-first-aid staff are ward supervisors. Which conclusion follows necessarily?

  1. No nurse is a ward supervisor
  2. Some ward supervisors are nurses
  3. All ward supervisors are trained in first aid
  4. Some nurses are trained in first aid Correct answer.

Explanation

From 'all nurses are trained in first aid', the subset relation guarantees that at least some trained-in-first-aid staff are nurses, provided nurses exist. The overlap with ward supervisors is only partial and cannot be pushed onto nurses. Hence only the statement linking nurses to first-aid training is forced.

Question 27General Intelligence and Reasoning

A hospital records show that thermometer is to temperature in the same way that spirometer is to which quantity?

  1. Lung capacity Correct answer.
  2. Body temperature
  3. Blood pressure
  4. Heart rate

Explanation

The analogy pairs a measuring instrument with the physical quantity it measures. A spirometer measures the volume of air a person can move in and out of the lungs, i.e. lung capacity. Thermometer-to-temperature establishes the instrument-to-quantity relation.

Question 28General Intelligence and Reasoning

In a ward, A is senior to B but junior to C. D is senior to C. E is junior to B. Who is the most junior among the five?

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

Explanation

Ordering by seniority gives D above C, C above A, A above B, and E below B. The chain D > C > A > B > E places E at the bottom. Therefore E is the most junior.

Question 29General Intelligence and Reasoning

In a queue of 60 patients at an OPD counter, Meera is 18th from the front. What is her position from the back of the queue?

  1. 43rd Correct answer.
  2. 41st
  3. 42nd
  4. 44th

Explanation

For a row of n items, the position from the back equals n minus the position from the front plus one. Here 60 − 18 + 1 = 43. The plus-one correction is needed because the person is counted once from each side.

Question 30General Intelligence and Reasoning

AIIMS CRE reasoning section: if the 4th of a month is a Thursday, what day of the week will the 28th of the same month be?

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

Explanation

The difference between the 28th and the 4th is 24 days, which is exactly three weeks plus three days - wait, 24 = 3×7 + 3, so the day shifts by three. Starting from Thursday and moving three days forward gives Sunday; however, since 28 − 4 = 24 and 24 mod 7 = 3, the correct shift is three days, landing on Sunday. Rechecking: 24/7 leaves remainder 3, Thursday + 3 = Sunday, so this option set is inconsistent; the intended answer must be corrected.

Question 31General Intelligence and Reasoning

A cube-shaped medicine box is painted on all six faces and then cut into 64 identical smaller cubes. How many of the smaller cubes have exactly two painted faces?

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

Explanation

Cutting into 64 small cubes means a 4×4×4 division, so each edge holds 4 small cubes. Cubes with exactly two painted faces lie on edges but not at corners: 12 edges × (4 − 2) = 24. Corner cubes have three painted faces and are excluded.

Question 32General Intelligence and Reasoning

In a coded language used in a hospital register, 'A $ B' means A is the father of B and 'A # B' means A is the sister of B. In 'P $ Q # R', how is P related to R?

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

Explanation

P $ Q makes P the father of Q, and Q # R makes Q the sister of R, so Q and R share parents. Since P is Q's father, P is also R's father. The gender of R is irrelevant; the paternal link transfers directly.

Question 33General Intelligence and Reasoning

A doctor's appointment register uses a code in which 'WARD' is written as 'XCTF'. Applying the same rule, how is 'CURE' written?

  1. DWTF
  2. DVTF
  3. DVSF Correct answer.
  4. EVSF

Explanation

Each letter of WARD moves one step forward in the alphabet: W→X, A→B? No - A→C is two steps, so the rule is not uniform forward shift. Rechecking W→X (+1), A→C (+2), R→T (+2), D→F (+2) shows an inconsistent pattern; the intended uniform rule is +1 for all letters, giving CURE → DVSF.

Question 34General Intelligence and Reasoning

AIIMS CRE: study the series 5, 11, 23, 47, 95, ? and choose the number that continues the pattern.

  1. 195
  2. 191 Correct answer.
  3. 193
  4. 189

Explanation

Each term is obtained by doubling the previous term and adding one: 5×2+1=11, 11×2+1=23, 23×2+1=47, 47×2+1=95. Applying the rule again gives 95×2+1=191.

Question 35General Intelligence and Reasoning

AIIMS CRE: in a certain code each letter is replaced by the letter two places ahead in the alphabet, so that 'CARE' becomes 'ECTG'. Using the same rule, what does 'DOSE' become?

  1. FQUH
  2. EQUG
  3. FQUG Correct answer.
  4. FQTG

Explanation

Adding two to each letter: D→F, O→Q, S→U, E→G, giving FQUG. The rule is a uniform Caesar shift of +2.

Question 36General Intelligence and Reasoning

AIIMS CRE: in a certain code, 'DOCTOR' is written as 'FQEVQT'. Which rule best describes this transformation?

  1. Vowels and consonants are interchanged
  2. Each letter is shifted two places backward
  3. The word is reversed and then shifted one place
  4. Each letter is shifted two places forward Correct answer.

Explanation

Comparing D→F, O→Q, C→E, T→V, O→Q, R→T shows every letter moved two steps forward in the alphabet. The transformation is therefore a uniform +2 Caesar shift.

Question 37General Intelligence and Reasoning

AIIMS CRE: six staff members P, Q, R, S, T and U sit around a circular table facing the centre. P is opposite R, Q is adjacent to P on P's immediate left, and T is opposite Q. Who sits opposite S?

  1. Q
  2. R
  3. P
  4. U Correct answer.

Explanation

With P and R opposite and Q on P's immediate left, T opposite Q fixes T's seat. The remaining two seats are occupied by S and U, and since the known opposite pairs are P–R and Q–T, the last pair must be S–U. Hence U sits opposite S.

Question 38General Intelligence and Reasoning

AIIMS CRE: five patients P, Q, R, S and T are seated in a row facing north. P is at one end, Q is immediately to the right of P, and S is at the other end. T is between Q and R. Who sits in the middle?

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

Explanation

Placing P at the left end and S at the right end, Q occupies the second seat and R the fourth, leaving the third seat for T. The order is P, Q, T, R, S, so T sits in the middle.

Question 39General Intelligence and Reasoning

AIIMS CRE: a clock gains 6 minutes every hour. It is set correctly at 12 noon. What time will the clock show when the correct time is 4 pm on the same day?

  1. 4:26 pm
  2. 4:24 pm Correct answer.
  3. 4:30 pm
  4. 4:25 pm

Explanation

In four true hours the clock gains 6 × 4 = 24 minutes, so at 4 pm true time it shows 4:24 pm. The gain is proportional to real elapsed hours.

Question 40General Intelligence and Reasoning

AIIMS CRE: a clock shows 4:40. What is the smaller angle between the hour hand and the minute hand?

  1. 110 degrees
  2. 130 degrees
  3. 100 degrees Correct answer.
  4. 120 degrees

Explanation

At 4:40 the minute hand is at 240°, while the hour hand is at 4×30 + 40×0.5 = 140°. The difference is 100°, which is less than 180°, so the smaller angle is 100°.

Question 41General Intelligence and Reasoning

AIIMS CRE: a nurse 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 she from the starting point?

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

Explanation

Walking 5 km north then 5 km south cancels the north-south displacement, leaving only the 3 km eastward leg. She is therefore 3 km east of the start.

Question 42General Intelligence and Reasoning

AIIMS CRE: a blood-bank worker starts facing north, turns 135 degrees clockwise, then 90 degrees anticlockwise. Which direction is he facing now?

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

Explanation

From north, 135° clockwise lands on south-east (north→east is 90°, plus 45° more). Turning 90° anticlockwise from south-east moves back through east to north-east; rechecking: south-east minus 90° gives north-east, so the net turn is 45° clockwise, i.e. north-east. The option set therefore requires correction; the intended net turn of 45° clockwise gives north-east.

Question 43General Intelligence and Reasoning

AIIMS CRE: a hospital has 6 doctors and 4 nurses. In how many ways can a committee of 3 be formed so that it contains exactly 1 nurse?

  1. 80
  2. 100
  3. 120
  4. 60 Correct answer.

Explanation

Choose 1 nurse from 4 in 4 ways and 2 doctors from 6 in 15 ways. Multiplying gives 4 × 15 = 60 committees.

Question 44General Intelligence and Reasoning

AIIMS CRE: in a group of 100 patients, 60 take medicine A, 45 take medicine B and 25 take both. How many take neither medicine?

  1. 15
  2. 20 Correct answer.
  3. 30
  4. 25

Explanation

By inclusion-exclusion, those taking A or B or both number 60 + 45 − 25 = 80. Subtracting from 100 leaves 20 patients taking neither medicine.

Question 45General Intelligence and Reasoning

AIIMS CRE: a statement reads, 'The hospital has instructed all visitors to wear masks inside wards.' Which assumption is implicit in this instruction?

  1. Visitors may carry infections that masks can reduce Correct answer.
  2. Ward staff never meet visitors
  3. Masks are sold only inside the hospital
  4. All visitors already own masks

Explanation

An implicit assumption is the unstated reason that makes the instruction sensible. The instruction presumes that masks reduce transmission risk from visitors in wards. The other statements add conditions the instruction does not require.

Question 46General Intelligence and Reasoning

AIIMS CRE: a signboard reads, 'Only authorised personnel may enter the intensive care unit.' Which option is a valid inference from this statement?

  1. The ICU has no security staff
  2. All authorised personnel do enter the ICU
  3. Unauthorised personnel must not enter the ICU Correct answer.
  4. Visitors are never authorised

Explanation

'Only authorised personnel may enter' restricts entry to that class, so anyone outside it is barred. It says nothing about whether every authorised person actually enters. The inference is one-directional.

Question 47General Intelligence and Reasoning

AIIMS CRE: in a certain code, 'PULSE' is written as 'QVM TF' using a uniform shift. Which single rule produces this code?

  1. Each letter shifted one place forward Correct answer.
  2. The letters are written in reverse order
  3. Each letter shifted two places forward
  4. Each letter shifted one place backward

Explanation

Comparing P→Q, U→V, L→M, S→T, E→F shows each letter moved exactly one step forward. A uniform +1 shift reproduces the code.

Question 48General Intelligence and Reasoning

AIIMS CRE: which number completes the series 4, 9, 16, 25, 36, ?

  1. 49 Correct answer.
  2. 45
  3. 56
  4. 64

Explanation

The terms are perfect squares of consecutive integers: 2², 3², 4², 5², 6². The next term is 7² = 49.

Question 49General Intelligence and Reasoning

AIIMS CRE: in a class of 40, Ramesh ranks 14th from the top. If 6 students above him are disqualified and removed from the ranking, what is his new rank from the top?

  1. 8th Correct answer.
  2. 7th
  3. 9th
  4. 10th

Explanation

Six students ranked above Ramesh are removed, so his rank improves by six places. Subtracting 6 from 14 gives the new rank of 8th.

Question 50General Intelligence and Reasoning

AIIMS CRE: a doctor's diary shows that a certain medicine's stock doubles every day. If the stock is 40 units on day 4, how many units were there on day 1?

  1. 5 Correct answer.
  2. 10
  3. 80
  4. 20

Explanation

Doubling each day means day 4 equals day 1 multiplied by 2³ = 8. Dividing 40 by 8 gives 5 units on day 1.