Logical Reasoning Questions with Answers (Series, Coding-Decoding, Calendar)

Reasoning questions from the first round of most campus drives, with the trick explained.

1. Q1. Find the next number: 2, 6, 12, 20, 30, ?

   • A. 42
   • B. 44
   • C. 40
   • D. 36
   Show answerHide answer

   Answer: A. 42
   Differences 4, 6, 8, 10, 12 (n × (n + 1)).

2. Q2. Find the next number: 1, 4, 9, 16, 25, ?

   • A. 35
   • B. 36
   • C. 30
   • D. 49
   Show answerHide answer

   Answer: B. 36
   Squares of 1 to 6.

3. Q3. Find the next number: 3, 9, 27, 81, ?

   • A. 243
   • B. 108
   • C. 162
   • D. 324
   Show answerHide answer

   Answer: A. 243
   Multiply by 3.

4. Q4. Find the next number: 1, 1, 2, 3, 5, 8, 13, ?

   • A. 20
   • B. 21
   • C. 18
   • D. 26
   Show answerHide answer

   Answer: B. 21
   Fibonacci: add the two previous numbers.

5. Q5. Find the next number: 5, 11, 23, 47, ?

   • A. 94
   • B. 95
   • C. 71
   • D. 96
   Show answerHide answer

   Answer: B. 95
   ×2 + 1 each time.

6. Q6. Find the next number: 100, 96, 88, 76, 60, ?

   • A. 36
   • B. 48
   • C. 44
   • D. 40
   Show answerHide answer

   Answer: D. 40
   Subtract 4, 8, 12, 16, 20.

7. Q7. Find the missing number: 2, 3, 5, 7, 11, ?, 17

   • A. 12
   • B. 15
   • C. 14
   • D. 13
   Show answerHide answer

   Answer: D. 13
   Prime numbers.

8. Q8. Find the next number: 1, 8, 27, 64, ?

   • A. 81
   • B. 125
   • C. 100
   • D. 216
   Show answerHide answer

   Answer: B. 125
   Cubes.

9. Q9. Find the next number: 4, 7, 12, 19, 28, ?

   • A. 39
   • B. 38
   • C. 37
   • D. 40
   Show answerHide answer

   Answer: A. 39
   Differences 3, 5, 7, 9, 11.

10. Q10. Find the wrong number: 3, 7, 15, 31, 63, 128

    • A. 63
    • B. 15
    • C. 31
    • D. 128
    Show answerHide answer

    Answer: D. 128
    Each term is ×2 + 1: after 63 comes 127.

11. Q11. Find the next number: 0, 3, 8, 15, 24, ?

    • A. 33
    • B. 30
    • C. 35
    • D. 36
    Show answerHide answer

    Answer: C. 35
    n² − 1.

12. Q12. Find the next number: 6, 12, 10, 20, 18, ?

    • A. 16
    • B. 36
    • C. 24
    • D. 38
    Show answerHide answer

    Answer: B. 36
    Alternately ×2 and −2.

13. Q13. Find the next number: 7, 10, 8, 11, 9, ?

    • A. 10
    • B. 13
    • C. 7
    • D. 12
    Show answerHide answer

    Answer: D. 12
    Alternately +3 and −2.

14. Q14. Find the next number: 2, 5, 10, 17, 26, ?

    • A. 37
    • B. 39
    • C. 36
    • D. 35
    Show answerHide answer

    Answer: A. 37
    n² + 1.

15. Q15. Find the next number: 1, 2, 6, 24, 120, ?

    • A. 240
    • B. 600
    • C. 720
    • D. 840
    Show answerHide answer

    Answer: C. 720
    Factorials: ×2, ×3, ×4, ×5, ×6.

16. Q16. Find the next letters: A, C, F, J, O, ?

    • A. U
    • B. S
    • C. V
    • D. T
    Show answerHide answer

    Answer: A. U
    Gaps of 2, 3, 4, 5, 6.

17. Q17. Find the next term: AZ, BY, CX, DW, ?

    • A. FV
    • B. EV
    • C. EU
    • D. EW
    Show answerHide answer

    Answer: B. EV
    First letter moves forward, second moves back.

18. Q18. Find the next term: B, E, H, K, ?

    • A. M
    • B. O
    • C. L
    • D. N
    Show answerHide answer

    Answer: D. N
    Skip two letters each time.

19. Q19. What is the 18th letter of the English alphabet?

    • A. S
    • B. T
    • C. Q
    • D. R
    Show answerHide answer

    Answer: D. R
    A = 1 … R = 18.

20. Q20. Which letter is 7th to the right of the 12th letter from the left?

    • A. T
    • B. S
    • C. R
    • D. E
    Show answerHide answer

    Answer: B. S
    12 + 7 = 19th letter.

21. Q21. Which letter is 5th from the right end of the alphabet?

    • A. V
    • B. W
    • C. E
    • D. U
    Show answerHide answer

    Answer: A. V
    26 − 5 + 1 = 22nd letter.

22. Q22. Find the next term: ACE, BDF, CEG, ?

    • A. EGI
    • B. CFH
    • C. DFH
    • D. DEF
    Show answerHide answer

    Answer: C. DFH
    Each letter moves one place forward.

23. Q23. Find the next term: Z, X, U, Q, ?

    • A. N
    • B. K
    • C. M
    • D. L
    Show answerHide answer

    Answer: D. L
    Steps back of 2, 3, 4, 5.

24. Q24. If CAT is coded as DBU, how is DOG coded?

    • A. DPH
    • B. EPH
    • C. CNF
    • D. EPG
    Show answerHide answer

    Answer: B. EPH
    Each letter moves one place forward.

25. Q25. If MANGO is coded as OCPIQ, how is APPLE coded?

    • A. BQQMF
    • B. CRRMG
    • C. BRRNG
    • D. CRRNG
    Show answerHide answer

    Answer: D. CRRNG
    Each letter moves two places forward.

26. Q26. If TIGER is coded as SHFDQ, how is LION coded?

    • A. KHNM
    • B. KJNM
    • C. KHNO
    • D. MJPO
    Show answerHide answer

    Answer: A. KHNM
    Each letter moves one place back.

27. Q27. In a code, each letter is replaced by its position number. What is the code for BAD?

    • A. 124
    • B. 241
    • C. 214
    • D. 213
    Show answerHide answer

    Answer: C. 214
    B = 2, A = 1, D = 4.

28. Q28. If the sum of letter positions in ACE is 9, what is the sum for BIG?

    • A. 17
    • B. 18
    • C. 20
    • D. 16
    Show answerHide answer

    Answer: B. 18
    B (2) + I (9) + G (7) = 18.

29. Q29. If PEN is written as NEP, how is BOOK written?

    • A. KOOB
    • B. KBOO
    • C. BKOO
    • D. OOKB
    Show answerHide answer

    Answer: A. KOOB
    The word is reversed.

30. Q30. If each letter is replaced by its opposite (A↔Z, B↔Y …), what is the code for CAT?

    • A. XZH
    • B. XZG
    • C. XYG
    • D. YZG
    Show answerHide answer

    Answer: B. XZG
    C↔X, A↔Z, T↔G.

31. Q31. If a word's code is the sum of its letter positions (A = 1 … Z = 26), what is the code for SKY?

    • A. 53
    • B. 45
    • C. 55
    • D. 54
    Show answerHide answer

    Answer: C. 55
    S (19) + K (11) + Y (25) = 55.

32. Q32. A man walks 5 km north, then 3 km east, then 5 km south. How far is he from the start?

    • A. 5 km
    • B. 13 km
    • C. 3 km
    • D. 8 km
    Show answerHide answer

    Answer: C. 3 km
    North and south cancel, leaving 3 km east.

33. Q33. Ravi walks 6 km east, then 8 km north. How far is he from the start?

    • A. 12 km
    • B. 10 km
    • C. 2 km
    • D. 14 km
    Show answerHide answer

    Answer: B. 10 km
    √(36 + 64) = 10.

34. Q34. Facing north, Priya turns right, then right again, then left. Which direction is she facing?

    • A. South
    • B. North
    • C. East
    • D. West
    Show answerHide answer

    Answer: C. East
    North → East → South → East.

35. Q35. Facing east, a man turns 90° clockwise and then 180°. Which direction does he face?

    • A. West
    • B. South
    • C. North
    • D. East
    Show answerHide answer

    Answer: C. North
    East → South → North.

36. Q36. In the morning, a person's shadow falls to his right. Which direction is he facing?

    • A. East
    • B. South
    • C. North
    • D. West
    Show answerHide answer

    Answer: B. South
    Morning sun is in the east, so shadows point west; west is on the right when facing south.

37. Q37. A walks 10 m south, turns left and walks 20 m, turns left and walks 10 m. In which direction is he from the start?

    • A. West
    • B. East
    • C. North
    • D. South
    Show answerHide answer

    Answer: B. East
    South then east then north: he ends 20 m east of the start.

38. Q38. Starting at a point, Kumar walks 4 km west, 3 km south, 4 km east and 6 km north. How far is he from the start?

    • A. 5 km
    • B. 6 km
    • C. 9 km
    • D. 3 km
    Show answerHide answer

    Answer: D. 3 km
    West and east cancel; net 3 km north.

39. Q39. If south-east becomes north and north-east becomes west, what does west become?

    • A. North-west
    • B. South-east
    • C. East
    • D. South-west
    Show answerHide answer

    Answer: B. South-east
    Everything turns 135° anticlockwise; west becomes south-east.

40. Q40. Asha is 12th from the top and 18th from the bottom in a class. How many students are there?

    • A. 28
    • B. 29
    • C. 30
    • D. 31
    Show answerHide answer

    Answer: B. 29
    12 + 18 − 1.

41. Q41. In a row of 40 students, Bala is 15th from the left. What is his position from the right?

    • A. 24
    • B. 27
    • C. 25
    • D. 26
    Show answerHide answer

    Answer: D. 26
    40 − 15 + 1.

42. Q42. A is taller than B, B is taller than C, and D is taller than A. Who is the shortest?

    • A. D
    • B. B
    • C. A
    • D. C
    Show answerHide answer

    Answer: D. C
    Order: D > A > B > C.

43. Q43. In a queue, there are 7 people ahead of Meena and 12 behind her. How many people are in the queue?

    • A. 21
    • B. 19
    • C. 18
    • D. 20
    Show answerHide answer

    Answer: D. 20
    7 + 1 + 12.

44. Q44. Five friends sit in a row. C is in the middle, A is at the left end, and B is next to A. E is not next to C. Who is at the right end?

    • A. B
    • B. E
    • C. D
    • D. C
    Show answerHide answer

    Answer: B. E
    Order: A B C D E.

45. Q45. Among P, Q, R and S, P scored more than Q, R scored less than S, and Q scored more than S. Who scored the least?

    • A. P
    • B. S
    • C. R
    • D. Q
    Show answerHide answer

    Answer: C. R
    P > Q > S > R.

46. Q46. Pointing to a man, Anu says, 'He is the son of my grandfather's only son.' How is the man related to Anu?

    • A. Father
    • B. Brother
    • C. Cousin
    • D. Uncle
    Show answerHide answer

    Answer: B. Brother
    Her grandfather's only son is her father; his son is her brother.

47. Q47. A is B's brother. C is A's mother. D is C's father. How is D related to B?

    • A. Brother
    • B. Father
    • C. Uncle
    • D. Grandfather
    Show answerHide answer

    Answer: D. Grandfather
    D is the father of B's mother.

48. Q48. If X is the husband of Y, and Y is the sister of Z, how is X related to Z?

    • A. Brother-in-law
    • B. Brother
    • C. Father-in-law
    • D. Cousin
    Show answerHide answer

    Answer: A. Brother-in-law
    X is married to Z's sister.

49. Q49. Pointing to a photo, Ravi says, 'Her mother is the only daughter of my mother.' How is Ravi related to the girl?

    • A. Maternal uncle
    • B. Cousin
    • C. Father
    • D. Brother
    Show answerHide answer

    Answer: A. Maternal uncle
    The only daughter of his mother is his sister; the girl is his sister's daughter.

50. Q50. A's father is B's son. B's only daughter is C. How is C related to A?

    • A. Sister
    • B. Mother
    • C. Grandmother
    • D. Aunt
    Show answerHide answer

    Answer: D. Aunt
    C is the sister of A's father.

51. Q51. P is the mother of Q. Q is the sister of R. R is the father of S. How is P related to S?

    • A. Sister
    • B. Mother
    • C. Grandmother
    • D. Aunt
    Show answerHide answer

    Answer: C. Grandmother
    P is the mother of S's father.

52. Q52. All cats are animals. All animals need food. Which conclusion follows?

    • A. Some animals don't need food
    • B. All animals are cats
    • C. All cats need food
    • D. No cats need food
    Show answerHide answer

    Answer: C. All cats need food
    If every cat is an animal and every animal needs food, every cat needs food.

53. Q53. All roses are flowers. Some flowers fade quickly. Which conclusion definitely follows?

    • A. All roses fade quickly
    • B. No roses fade quickly
    • C. None of the given conclusions
    • D. Some roses fade quickly
    Show answerHide answer

    Answer: C. None of the given conclusions
    The flowers that fade may or may not include roses.

54. Q54. No fish can fly. Some birds can fly. Which conclusion follows?

    • A. No birds are fish
    • B. Some birds are not fish
    • C. Some fish are birds
    • D. All birds are fish
    Show answerHide answer

    Answer: B. Some birds are not fish
    Birds that fly can't be fish.

55. Q55. All engineers are graduates. Some graduates are teachers. Which conclusion follows?

    • A. Some engineers are teachers
    • B. None follows definitely
    • C. All teachers are engineers
    • D. No engineer is a teacher
    Show answerHide answer

    Answer: B. None follows definitely
    The teacher graduates might not overlap with engineers.

56. Q56. Some pens are pencils. All pencils are erasers. Which conclusion follows?

    • A. All pens are erasers
    • B. No pen is an eraser
    • C. Some pens are erasers
    • D. All erasers are pens
    Show answerHide answer

    Answer: C. Some pens are erasers
    The pens that are pencils are also erasers.

57. Q57. Book : Author :: Painting : ?

    • A. Painter
    • B. Brush
    • C. Gallery
    • D. Canvas
    Show answerHide answer

    Answer: A. Painter
    The creator of each.

58. Q58. Doctor : Hospital :: Teacher : ?

    • A. Student
    • B. Book
    • C. Class test
    • D. School
    Show answerHide answer

    Answer: D. School
    Place of work.

59. Q59. 4 : 16 :: 7 : ?

    • A. 14
    • B. 21
    • C. 28
    • D. 49
    Show answerHide answer

    Answer: D. 49
    Square of the number.

60. Q60. 8 : 512 :: 5 : ?

    • A. 25
    • B. 100
    • C. 64
    • D. 125
    Show answerHide answer

    Answer: D. 125
    Cube of the number.

61. Q61. Which is the odd one out? 2, 3, 5, 9, 11

    • A. 5
    • B. 2
    • C. 9
    • D. 11
    Show answerHide answer

    Answer: C. 9
    All others are prime.

62. Q62. Which is the odd one out? 16, 25, 36, 48, 64

    • A. 36
    • B. 48
    • C. 64
    • D. 25
    Show answerHide answer

    Answer: B. 48
    All others are perfect squares.

63. Q63. Which is the odd one out? Apple, Mango, Potato, Banana

    • A. Mango
    • B. Potato
    • C. Banana
    • D. Apple
    Show answerHide answer

    Answer: B. Potato
    The others are fruits.

64. Q64. Which is the odd one out? Python, Java, Oracle, C++

    • A. Python
    • B. C++
    • C. Oracle
    • D. Java
    Show answerHide answer

    Answer: C. Oracle
    The others are programming languages; Oracle is a database/company.

65. Q65. Which is the odd one out? Keyboard, Mouse, Monitor, Scanner

    • A. Keyboard
    • B. Mouse
    • C. Scanner
    • D. Monitor
    Show answerHide answer

    Answer: D. Monitor
    The others are input devices; a monitor is output.

66. Q66. Which pair is different? 3:9, 4:16, 5:25, 6:30

    • A. 6:30
    • B. 3:9
    • C. 5:25
    • D. 4:16
    Show answerHide answer

    Answer: A. 6:30
    The others are n : n².

67. Q67. Which is the odd one out? CEG, FHJ, KMO, PRU

    • A. PRU
    • B. CEG
    • C. KMO
    • D. FHJ
    Show answerHide answer

    Answer: A. PRU
    The others skip one letter each time; PRU skips one then two.

68. Q68. If 5 March is a Monday, what day is 26 March of the same year?

    • A. Saturday
    • B. Monday
    • C. Sunday
    • D. Tuesday
    Show answerHide answer

    Answer: B. Monday
    21 days later is exactly 3 weeks.

69. Q69. If yesterday was Saturday, what day will it be 3 days after tomorrow?

    • A. Friday
    • B. Wednesday
    • C. Thursday
    • D. Tuesday
    Show answerHide answer

    Answer: C. Thursday
    Today is Sunday and tomorrow is Monday; three days after Monday is Thursday.

70. Q70. A clock shows 8:00. How many degrees has the hour hand moved since 12:00?

    • A. 240°
    • B. 120°
    • C. 270°
    • D. 200°
    Show answerHide answer

    Answer: A. 240°
    30° per hour × 8.

71. Q71. What is the mirror image time of 3:15 on a wall clock?

    • A. 8:15
    • B. 9:45
    • C. 8:45
    • D. 9:15
    Show answerHide answer

    Answer: C. 8:45
    Mirror time = 11:60 − 3:15.

72. Q72. In a group of cows and hens, there are 30 heads and 84 legs. How many cows are there?

    • A. 10
    • B. 18
    • C. 12
    • D. 15
    Show answerHide answer

    Answer: C. 12
    4c + 2(30 − c) = 84, so c = 12.

73. Q73. A clock strikes once at 1, twice at 2 and so on. How many times does it strike in 12 hours?

    • A. 72
    • B. 66
    • C. 78
    • D. 144
    Show answerHide answer

    Answer: C. 78
    1 + 2 + … + 12.

74. Q74. How many squares are there on a standard 8 × 8 chessboard (all sizes)?

    • A. 204
    • B. 64
    • C. 256
    • D. 100
    Show answerHide answer

    Answer: A. 204
    1² + 2² + … + 8².

75. Q75. How many triangles are formed by joining 6 points on a circle?

    • A. 30
    • B. 15
    • C. 18
    • D. 20
    Show answerHide answer

    Answer: D. 20
    C(6, 3).

76. Q76. If 6 machines make 6 parts in 6 minutes, how many machines make 100 parts in 100 minutes?

    • A. 60
    • B. 6
    • C. 100
    • D. 10
    Show answerHide answer

    Answer: B. 6
    Each machine makes one part every 6 minutes, so 100 parts in 100 minutes needs 6 machines.

77. Q77. A frog climbs 3 m up a 10 m well each day and slips 2 m each night. On which day does it get out?

    • A. Day 7
    • B. Day 8
    • C. Day 9
    • D. Day 10
    Show answerHide answer

    Answer: B. Day 8
    After 7 days it is at 7 m; on day 8 it climbs 3 m and is out.

78. Q78. How many times does the digit 7 appear when writing the numbers from 1 to 100?

    • A. 11
    • B. 19
    • C. 10
    • D. 20
    Show answerHide answer

    Answer: D. 20
    10 in the units place and 10 in the tens place.

79. Q79. A book's pages are numbered 1 to 120. How many digits are used?

    • A. 246
    • B. 360
    • C. 240
    • D. 252
    Show answerHide answer

    Answer: D. 252
    9 + 180 + 63.

80. Q80. If 1 = 5, 2 = 10, 3 = 15, 4 = 20, then 5 = ?

    • A. 30
    • B. 25
    • C. 1
    • D. 5
    Show answerHide answer

    Answer: C. 1
    The puzzle states 1 = 5, so 5 = 1.

81. Q81. What comes next: J, F, M, A, M, J, J, ?

    • A. O
    • B. S
    • C. N
    • D. A
    Show answerHide answer

    Answer: D. A
    First letters of the months: January … August.

82. Q82. What comes next: M, T, W, T, F, S, ?

    • A. W
    • B. T
    • C. M
    • D. S
    Show answerHide answer

    Answer: D. S
    First letters of the days: … Sunday.

83. Q83. If in a certain language 'pit tok' means 'red apple' and 'tok sim' means 'apple juice', what does 'tok' mean?

    • A. juice
    • B. apple
    • C. sim
    • D. red
    Show answerHide answer

    Answer: B. apple
    tok is the common word, and apple is the common meaning.

84. Q84. Statements: All laptops are computers. Some computers are cheap. Conclusion I: Some laptops are cheap. Conclusion II: All computers are laptops.

    • A. Both follow
    • B. Neither I nor II follows
    • C. Only II follows
    • D. Only I follows
    Show answerHide answer

    Answer: B. Neither I nor II follows
    Neither is guaranteed by the statements.

85. Q85. Which number should replace the question mark? 3, 6, 18, 72, ?

    • A. 288
    • B. 216
    • C. 360
    • D. 144
    Show answerHide answer

    Answer: C. 360
    ×2, ×3, ×4, ×5.

86. Q86. Find the next number: 1, 3, 7, 15, 31, ?

    • A. 63
    • B. 47
    • C. 62
    • D. 64
    Show answerHide answer

    Answer: A. 63
    2ⁿ − 1.

87. Q87. Find the next number: 11, 13, 17, 19, 23, ?

    • A. 27
    • B. 31
    • C. 25
    • D. 29
    Show answerHide answer

    Answer: D. 29
    Prime numbers after 23: 29.

88. Q88. Find the next number: 2, 4, 8, 14, 22, ?

    • A. 34
    • B. 32
    • C. 28
    • D. 30
    Show answerHide answer

    Answer: B. 32
    Differences 2, 4, 6, 8, 10.

89. Q89. Find the next number: 121, 144, 169, 196, ?

    • A. 256
    • B. 225
    • C. 210
    • D. 216
    Show answerHide answer

    Answer: B. 225
    Squares of 11 to 15.

90. Q90. Find the next number: 9, 18, 27, 36, ?

    • A. 42
    • B. 54
    • C. 40
    • D. 45
    Show answerHide answer

    Answer: D. 45
    Multiples of 9.

91. Q91. Find the missing term: AB, DE, GH, ?, MN

    • A. IJ
    • B. JL
    • C. JK
    • D. KL
    Show answerHide answer

    Answer: C. JK
    Each pair starts three letters later.

92. Q92. If ROSE is coded as 6821 and CHAIR as 73456, how is SEARCH coded?

    • A. 214763
    • B. 214637
    • C. 216473
    • D. 214673
    Show answerHide answer

    Answer: D. 214673
    Map each letter: S2 E1 A4 R6 C7 H3.

93. Q93. If '+' means '×', '−' means '+', '×' means '÷' and '÷' means '−', what is 8 + 4 − 6 × 2 ÷ 1?

    • A. 26
    • B. 30
    • C. 36
    • D. 34
    Show answerHide answer

    Answer: D. 34
    Becomes 8 × 4 + 6 ÷ 2 − 1 = 32 + 3 − 1.

94. Q94. Arrange in a meaningful order: 1. Seed 2. Tree 3. Plant 4. Fruit

    • A. 3, 1, 2, 4
    • B. 1, 2, 3, 4
    • C. 4, 1, 3, 2
    • D. 1, 3, 2, 4
    Show answerHide answer

    Answer: D. 1, 3, 2, 4
    Seed → plant → tree → fruit.

95. Q95. Arrange the words in dictionary order: Plan, Planet, Plane, Plain. Which comes third?

    • A. Plane
    • B. Plan
    • C. Planet
    • D. Plain
    Show answerHide answer

    Answer: A. Plane
    Plain, Plan, Plane, Planet.

96. Q96. How many meaningful English words can be made with the letters E, A, T using each once?

    • A. 3
    • B. 1
    • C. 4
    • D. 2
    Show answerHide answer

    Answer: A. 3
    EAT, TEA, ATE.

97. Q97. If all the letters of TALENT are arranged alphabetically, which letter is in the middle (third)?

    • A. E
    • B. N
    • C. L
    • D. T
    Show answerHide answer

    Answer: C. L
    A E L N T T.

98. Q98. A cube painted on all sides is cut into 27 equal smaller cubes. How many small cubes have exactly two painted faces?

    • A. 1
    • B. 8
    • C. 6
    • D. 12
    Show answerHide answer

    Answer: D. 12
    One per edge: 12 edges × (3 − 2).

99. Q99. In the cube puzzle above (27 small cubes), how many have no painted face?

    • A. 8
    • B. 0
    • C. 1
    • D. 6
    Show answerHide answer

    Answer: C. 1
    Only the centre cube: (3 − 2)³.

100. Q100. In the same cube (27 small cubes), how many have exactly three painted faces?

     • A. 8
     • B. 4
     • C. 12
     • D. 6
     Show answerHide answer

     Answer: A. 8
     The corners.

101. Q101. Find the odd one out: 27, 64, 125, 144, 216

     • A. 125
     • B. 27
     • C. 144
     • D. 216
     Show answerHide answer

     Answer: C. 144
     The others are cubes.

102. Q102. Which number is the odd one out? 121, 169, 225, 289, 324, 361, 400

     • A. None: all are perfect squares
     • B. 324
     • C. 225
     • D. 400
     Show answerHide answer

     Answer: A. None: all are perfect squares
     11², 13², 15², 17², 18², 19², 20²: all squares.

103. Q103. A is twice as fast as B. If B takes 30 minutes for a task, how long does A take?

     • A. 10 minutes
     • B. 60 minutes
     • C. 20 minutes
     • D. 15 minutes
     Show answerHide answer

     Answer: D. 15 minutes
     Twice the speed, half the time.

104. Q104. What is the next number in the pattern 3, 5, 9, 17, 33, ?

     • A. 49
     • B. 65
     • C. 64
     • D. 66
     Show answerHide answer

     Answer: B. 65
     ×2 − 1.

105. Q105. If FRIEND is coded as HUMJTK, how is CANDLE coded?

     • A. ECRIRL
     • B. DCQHQK
     • C. EDRIRL
     • D. EDRJRL
     Show answerHide answer

     Answer: C. EDRIRL
     Shifts of +2, +3, +4, +5, +6, +7.

106. Q106. Find the next term: 2Z5, 7Y7, 14X9, 23W11, ?

     • A. 35V12
     • B. 34U13
     • C. 34V13
     • D. 32V13
     Show answerHide answer

     Answer: C. 34V13
     Numbers +5, +7, +9, +11; letters back by one; last numbers +2.

107. Q107. How many 1s are followed immediately by a 3 in: 1 3 5 1 3 7 1 1 3 9 3 1?

     • A. 3
     • B. 2
     • C. 4
     • D. 5
     Show answerHide answer

     Answer: A. 3
     Positions (1,3), (1,3), (1,3).

108. Q108. If 'SKILL' is written as 'LLIKS', how is 'PARK' written?

     • A. PRAK
     • B. KRAP
     • C. KARP
     • D. RKAP
     Show answerHide answer

     Answer: B. KRAP
     The word is reversed.

109. Q109. Five people A, B, C, D and E sit around a round table. In how many distinct ways can they be seated?

     • A. 120
     • B. 24
     • C. 12
     • D. 60
     Show answerHide answer

     Answer: B. 24
     Circular arrangements: (5 − 1)!.

110. Q110. If the day before yesterday was Thursday, what day is the day after tomorrow?

     • A. Tuesday
     • B. Sunday
     • C. Monday
     • D. Saturday
     Show answerHide answer

     Answer: C. Monday
     Today is Saturday; the day after tomorrow is Monday.

111. Q111. What comes next in the series? 13, 21, 29, 37, 45, ?

     • A. 61
     • B. 56
     • C. 53
     • D. 52
     Show answerHide answer

     Answer: C. 53
     The rule is: add 8 each time. So the next number is 53.

112. Q112. What comes next in the series? 16, 25, 36, 49, 64, ?

     • A. 81
     • B. 83
     • C. 80
     • D. 84
     Show answerHide answer

     Answer: A. 81
     The rule is: squares of 4, 5, 6, …. So the next number is 81.

113. Q113. What comes next in the series? 1, 5, 13, 25, 41, ?

     • A. 60
     • B. 59
     • C. 61
     • D. 64
     Show answerHide answer

     Answer: C. 61
     The rule is: the gap grows by 4: +4, +8, +12, …. So the next number is 61.

114. Q114. What comes next in the series? 5, 7, 11, 17, 25, ?

     • A. 43
     • B. 35
     • C. 34
     • D. 33
     Show answerHide answer

     Answer: B. 35
     The rule is: the gap grows by 2: +2, +4, +6, …. So the next number is 35.

115. Q115. What comes next in the series? 3, 6, 12, 24, 48, ?

     • A. 95
     • B. 96
     • C. 97
     • D. 94
     Show answerHide answer

     Answer: B. 96
     The rule is: multiply by 2 each time. So the next number is 96.

116. Q116. In a certain code, CLOUD is written as FORXG. How is DATA written in that code?

     • A. DWDG
     • B. GDWD
     • C. HEXE
     • D. AXQX
     Show answerHide answer

     Answer: B. GDWD
     Each letter moves 3 places forward in the alphabet, so DATA → GDWD.

117. Q117. In a certain code, CODE is written as EQFG. How is BRAIN written in that code?

     • A. PKCTD
     • B. DTCKP
     • C. ZPYGL
     • D. EUDLQ
     Show answerHide answer

     Answer: B. DTCKP
     Each letter moves 2 places forward in the alphabet, so BRAIN → DTCKP.

118. Q118. In a certain code, BRAIN is written as EUDLQ. How is TAMIL written in that code?

     • A. QXJFI
     • B. OLPDW
     • C. XEQMP
     • D. WDPLO
     Show answerHide answer

     Answer: D. WDPLO
     Each letter moves 3 places forward in the alphabet, so TAMIL → WDPLO.

119. Q119. In a certain code, LOGIC is written as MPHJD. How is DATA written in that code?

     • A. CZSZ
     • B. EBUB
     • C. FCVC
     • D. BUBE
     Show answerHide answer

     Answer: B. EBUB
     Each letter moves 1 place forward in the alphabet, so DATA → EBUB.

120. Q120. In a certain code, LOGIC is written as MPHJD. How is TAMIL written in that code?

     • A. SZLHK
     • B. MJNBU
     • C. UBNJM
     • D. VCOKN
     Show answerHide answer

     Answer: C. UBNJM
     Each letter moves 1 place forward in the alphabet, so TAMIL → UBNJM.

121. Q121. 1 January 2012 was a Sunday. What day of the week was 26 April 2012?

     • A. Wednesday
     • B. Tuesday
     • C. Thursday
     • D. Saturday
     Show answerHide answer

     Answer: C. Thursday
     Count the days from 1 January to 26 April (remember it's a leap year), take the remainder when divided by 7, and move forward that many weekdays from Sunday. The answer is Thursday.

122. Q122. 1 January 2026 was a Thursday. What day of the week was 13 December 2026?

     • A. Thursday
     • B. Friday
     • C. Monday
     • D. Sunday
     Show answerHide answer

     Answer: D. Sunday
     Count the days from 1 January to 13 December (remember it isn't a leap year), take the remainder when divided by 7, and move forward that many weekdays from Thursday. The answer is Sunday.

123. Q123. 1 January 2023 was a Sunday. What day of the week was 19 July 2023?

     • A. Thursday
     • B. Monday
     • C. Wednesday
     • D. Sunday
     Show answerHide answer

     Answer: C. Wednesday
     Count the days from 1 January to 19 July (remember it isn't a leap year), take the remainder when divided by 7, and move forward that many weekdays from Sunday. The answer is Wednesday.

124. Q124. 1 January 2016 was a Friday. What day of the week was 23 October 2016?

     • A. Monday
     • B. Saturday
     • C. Sunday
     • D. Friday
     Show answerHide answer

     Answer: C. Sunday
     Count the days from 1 January to 23 October (remember it's a leap year), take the remainder when divided by 7, and move forward that many weekdays from Friday. The answer is Sunday.

125. Q125. 1 January 2024 was a Monday. What day of the week was 8 June 2024?

     • A. Saturday
     • B. Sunday
     • C. Wednesday
     • D. Monday
     Show answerHide answer

     Answer: A. Saturday
     Count the days from 1 January to 8 June (remember it's a leap year), take the remainder when divided by 7, and move forward that many weekdays from Monday. The answer is Saturday.

126. Q126. What is the binary representation of the decimal number 156?

     • A. 10011100
     • B. 10011101
     • C. 10011011
     • D. 00111001
     Show answerHide answer

     Answer: A. 10011100
     Divide by 2 repeatedly and read the remainders from bottom to top: 156 = 10011100 in binary.

127. Q127. What is the decimal value of the binary number 1101000?

     • A. 112
     • B. 104
     • C. 105
     • D. 106
     Show answerHide answer

     Answer: B. 104
     Add the place values of the 1 bits: 64 + 32 + 8 = 104.

128. Q128. What is the binary representation of the decimal number 18?

     • A. 01001
     • B. 10001
     • C. 10010
     • D. 10011
     Show answerHide answer

     Answer: C. 10010
     Divide by 2 repeatedly and read the remainders from bottom to top: 18 = 10010 in binary.

129. Q129. What is the decimal value of the binary number 1110000?

     • A. 112
     • B. 113
     • C. 114
     • D. 111
     Show answerHide answer

     Answer: A. 112
     Add the place values of the 1 bits: 64 + 32 + 16 = 112.

130. Q130. What is the decimal value of the binary number 11000010?

     • A. 202
     • B. 195
     • C. 192
     • D. 194
     Show answerHide answer

     Answer: D. 194
     Add the place values of the 1 bits: 128 + 64 + 2 = 194.