General Intelligence and Reasoning is a high-scoring and critical section in Staff Selection Commission (SSC) exams like CGL, CHSL, MTS, and CPO. This section evaluates a candidate’s logical thinking, analytical abilities, and problem-solving skills through a strategic mix of verbal and non-verbal questions. Key concepts heavily tested include coding-decoding, semantic analogies, number series, syllogism, blood relations, and spatial visualization. Mastering these logic patterns requires consistent practice to identify underlying rules quickly and accurately under strict time constraints. Practicing targeted multiple-choice questions helps candidates familiarize themselves with recurring SSC models, reducing calculation time and maximizing overall scores in the computer-based tests.
1. Find the missing number in the series: 2, 5, 10, 17, 26, ?
Correct Answer: c) 37
Explanation:
The pattern is adding consecutive odd numbers: +3, +5, +7, +9, +11. So, 26 + 11 = 37.
2. Find the missing number in the series: 1, 8, 27, 64, 125, ?
Correct Answer: c) 216
Explanation:
The series consists of cubes of natural numbers: 1^3, 2^3, 3^3, 4^3, 5^3. The next number is 6^3 = 216.
3. Find the next number in the series: 3, 7, 15, 31, ?
Correct Answer: b) 63
Explanation:
The pattern is (previous number * 2) + 1. So, (31 * 2) + 1 = 63.
4. Find the missing term: 120, 99, 80, 63, 48, ?
Correct Answer: a) 35
Explanation:
The series follows n^2 - 1 in decreasing order: 11^2-1, 10^2-1, 9^2-1, 8^2-1, 7^2-1. Next is 6^2-1 = 35.
5. What comes next in the sequence: 5, 11, 24, 51, 106, ?
Correct Answer: c) 217
Explanation:
The pattern is *2+1, *2+2, *2+3, *2+4. Next is 106 * 2 + 5 = 217.
6. Find the missing number: 8, 28, 116, 584, ?
Correct Answer: c) 3508
Explanation:
The pattern is *3+4, *4+4, *5+4. Next is 584 * 6 + 4 = 3508.
7. What is the next prime number in the series: 2, 3, 5, 7, 11, ?
Correct Answer: b) 13
Explanation:
The series consists of consecutive prime numbers. The prime number after 11 is 13.
8. Complete the series: 10, 100, 200, 310, ?
Correct Answer: d) 430
Explanation:
The difference between terms is increasing by 10 each time: +90, +100, +110. The next difference is +120. 310 + 120 = 430.
9. Find the missing number: 0, 3, 8, 15, 24, ?
Correct Answer: b) 35
Explanation:
The series follows n^2 - 1 for natural numbers: 1^2-1=0, 2^2-1=3, 3^2-1=8, etc. Next is 6^2-1 = 35.
10. What comes next in the sequence: 14, 28, 20, 40, 32, ?
Correct Answer: c) 64
Explanation:
The pattern alternates between multiply by 2 and subtract 8: 14*2=28, 28-8=20, 20*2=40, 40-8=32. Next is 32*2 = 64.
11. Find the missing term: 1, 9, 25, 49, 81, ?
Correct Answer: b) 121
Explanation:
The series consists of squares of consecutive odd numbers: 1^2, 3^2, 5^2, 7^2, 9^2. The next is 11^2 = 121.
12. Complete the series: 6, 13, 28, 59, ?
Correct Answer: c) 122
Explanation:
The pattern is (previous number * 2) + 1, *2 + 2, *2 + 3. Next is (59 * 2) + 4 = 122.
13. Find the next number: 7, 10, 8, 11, 9, 12, ?
Correct Answer: b) 10
Explanation:
The pattern alternates: +3, -2, +3, -2. So, 12 - 2 = 10.
14. What is the next number: 36, 34, 30, 28, 24, ?
Correct Answer: b) 22
Explanation:
The pattern is an alternating subtraction of 2 and 4: -2, -4, -2, -4. Next is 24 - 2 = 22.
15. Complete the series: 2, 6, 12, 20, 30, ?
Correct Answer: b) 42
Explanation:
The pattern follows n^2 + n for natural numbers: 1^2+1=2, 2^2+2=6, 3^2+3=12, 4^2+4=20, 5^2+5=30. Next is 6^2+6=42.
16. Find the missing letter: A, C, F, J, O, ?
Correct Answer: c) U
Explanation:
The gap between letters increases by 1 each time: +2, +3, +4, +5. Next is O + 6 = U.
17. Find the next letter in the series: Z, X, V, T, R, ?
Correct Answer: b) P
Explanation:
The series goes backward by skipping one letter each time (-2). R - 2 = P.
18. Complete the series: BMO, EOQ, HQS, ?
Correct Answer: a) KSU
Explanation:
First letter: +3 (B, E, H, K). Second letter: +2 (M, O, Q, S). Third letter: +2 (O, Q, S, U). The result is KSU.
19. Find the missing sequence: QAR, RAS, SAT, TAU, ?
Correct Answer: b) UAV
Explanation:
First letter moves forward by 1 (Q, R, S, T, U). Second letter is always A. Third letter moves forward by 1 (R, S, T, U, V).
20. Complete the series: CMM, EOO, GQQ, ?
Correct Answer: b) ISS
Explanation:
First letter skips one (+2). The last two letters are the same and also skip one forward (+2 from the previous pair). After GQQ comes ISS.
21. Find the missing term: SCD, TEF, UGH, ?
Correct Answer: a) VIJ
Explanation:
First letter: S, T, U, V (+1). The next two letters are consecutive alphabet pairs: CD, EF, GH, IJ.
22. Complete the series: FAG, GAF, HAI, IAH, ?
Correct Answer: a) JAK
Explanation:
First letters: F, G, H, I, J. The middle is always A. Third letters: G, F, I, H, K (alternating +1 and -1 from a sequence). Wait, actually: FAG, GAF are reverses with shift. F(+1)A(same)G(-1)=GAF. H(+1)A(same)I(-1)=IAH. So next is JAK.
23. Find the next string: ELFA, GLHA, ILJA, ?
Correct Answer: a) KLLA
Explanation:
First letter +2: E, G, I, K. Second letter is always L. Third letter +2: F, H, J, L. Fourth letter is always A.
24. Find the missing term: WFB, TGD, QHG, ?
Correct Answer: a) NIK
Explanation:
First letter -3: W, T, Q, N. Second letter +1: F, G, H, I. Third letter +2, +3, +4: B, D, G, K. Result is NIK.
25. Complete the series: AZ, CX, EV, GT, ?
Correct Answer: b) IR
Explanation:
These are pairs of opposite letters. First letter skips one (+2): A, C, E, G, I. Opposite of I is R.
26. Find the next string: YEB, WFD, UHG, SKI, ?
Correct Answer: a) QOL
Explanation:
First letter -2: Y, W, U, S, Q. Second letter +1, +2, +3, +4: E, F, H, K, O. Third letter +2, +3, +2, +3: B, D, G, I, L. Result is QOL.
27. Complete the alphanumeric series: 2Z5, 7Y7, 14X9, 23W11, 34V13, ?
Correct Answer: b) 47U15
Explanation:
First number difference is +5, +7, +9, +11, +13 (34+13=47). Letter is -1: Z, Y, X, W, V, U. Second number is +2: 5, 7, 9, 11, 13, 15.
28. Find the next letter: K, J, L, I, M, ?
Correct Answer: b) H
Explanation:
This is an alternating series. Series 1: K, L, M (+1). Series 2: J, I, H (-1).
29. Complete the series: DEF, HIJ, MNO, ?
Correct Answer: a) STU
Explanation:
The first letter of each group shifts by +4 (D to H), +5 (H to M), +6 (M to S). The rest are consecutive letters. Result is STU.
30. Find the next term: BCB, DED, FGF, HIH, ?
Correct Answer: a) JKJ
Explanation:
The pattern skips one letter for the start of each group (B, D, F, H, J). The middle letter is the next alphabetical letter, and the third mirrors the first.
31. Dog : Bark :: Bird : ?
Correct Answer: b) Chirp
Explanation:
Bark is the sound made by a dog. Chirp is the sound made by a bird.
32. Book : Publisher :: Film : ?
Correct Answer: b) Producer
Explanation:
A publisher is responsible for the financial and organizational backing of a book, just as a producer is for a film.
33. Doctor : Hospital :: Teacher : ?
Correct Answer: b) School
Explanation:
A hospital is the primary workplace of a doctor. A school is the primary workplace of a teacher.
34. Thermometer : Temperature :: Odometer : ?
Correct Answer: b) Distance
Explanation:
A thermometer measures temperature. An odometer measures distance traveled by a vehicle.
35. Ocean : Water :: Glacier : ?
Correct Answer: a) Ice
Explanation:
An ocean is made of a large body of water. A glacier is made of a large body of dense ice.
36. Pen : Write :: Knife : ?
Correct Answer: b) Cut
Explanation:
A pen is a tool used for writing. A knife is a tool used for cutting.
37. Clock : Time :: Compass : ?
Correct Answer: b) Direction
Explanation:
A clock indicates time, whereas a compass indicates direction.
38. Eye : See :: Ear : ?
Correct Answer: a) Hear
Explanation:
The eye is the sensory organ for seeing. The ear is the sensory organ for hearing.
39. Car : Garage :: Aeroplane : ?
Correct Answer: b) Hangar
Explanation:
A car is parked and stored in a garage. An aeroplane is parked and stored in a hangar.
40. Lion : Den :: Rabbit : ?
Correct Answer: c) Burrow
Explanation:
A lion lives in a den. A rabbit lives in a burrow.
41. Moon : Satellite :: Earth : ?
Correct Answer: c) Planet
Explanation:
The Moon is classified as a satellite. The Earth is classified as a planet.
42. Cobbler : Leather :: Carpenter : ?
Correct Answer: b) Wood
Explanation:
A cobbler works primarily with leather. A carpenter works primarily with wood.
43. Bird : Wing :: Fish : ?
Correct Answer: b) Fin
Explanation:
A bird uses wings to move (fly). A fish uses fins to move (swim).
44. Circle : Circumference :: Square : ?
Correct Answer: b) Perimeter
Explanation:
The outer boundary of a circle is its circumference. The outer boundary of a square is its perimeter.
45. Good : Bad :: Roof : ?
Correct Answer: b) Floor
Explanation:
Good is the antonym of Bad. Roof is structurally the opposite of Floor.
46. 5 : 25 :: 7 : ?
Correct Answer: c) 49
Explanation:
The relationship is x : x^2. So, 5^2 is 25, and 7^2 is 49.
47. 8 : 64 :: 11 : ?
Correct Answer: a) 121
Explanation:
The relationship is x : x^2. 8^2 is 64, and 11^2 is 121.
48. 4 : 20 :: 6 : ?
Correct Answer: c) 42
Explanation:
The relationship is x : x^2 + x. 4^2 + 4 = 20. Thus, 6^2 + 6 = 42.
49. 12 : 144 :: 15 : ?
Correct Answer: b) 225
Explanation:
The relationship is x : x^2. 12^2 is 144, and 15^2 is 225.
50. 9 : 80 :: 100 : ?
Correct Answer: c) 9999
Explanation:
The relationship is x : x^2 - 1. 9^2 - 1 = 80. Thus, 100^2 - 1 = 9999.
51. ABCD : WXYZ :: EFGH : ?
Correct Answer: b) STUV
Explanation:
The corresponding letters are reverse alphabetical pairs. A-Z, B-Y, C-X, D-W (reversed to WXYZ). E-V, F-U, G-T, H-S (reversed to STUV).
52. ACE : GIK :: MOQ : ?
Correct Answer: a) SUW
Explanation:
Each letter is shifted by +6. A+6=G, C+6=I, E+6=K. M+6=S, O+6=U, Q+6=W.
53. EGIK : FILO :: FHJL : ?
Correct Answer: a) GJMP
Explanation:
E+1=F, G+2=I, I+3=L, K+4=O. Applying the same to FHJL: F+1=G, H+2=J, J+3=M, L+4=P.
54. TRACTOR : 14 :: TROLLEY : ?
Correct Answer: b) 14
Explanation:
The number represents (Number of letters in the word) * 2. TRACTOR has 7 letters, 7*2=14. TROLLEY has 7 letters, 7*2=14.
55. PALE : LEPA :: PUSH : ?
Correct Answer: c) SHPU
Explanation:
The order of letters is changed from 1234 (PALE) to 3412 (LEPA). PUSH (1234) becomes SHPU (3412).
56. Find the odd one out among the following words.
Correct Answer: c) Potato
Explanation:
Apple, Mango, and Orange are fruits, whereas Potato is a root vegetable (tuber).
57. Find the odd one out.
Correct Answer: c) Brass
Explanation:
Copper, Zinc, and Iron are basic chemical elements (metals), whereas Brass is an alloy (mixture of copper and zinc).
58. Which of the following animals does not belong with the others?
Correct Answer: d) Cow
Explanation:
Tiger, Lion, and Leopard are wild carnivorous animals belonging to the cat family. A cow is a domestic herbivore.
59. Identify the odd month.
Correct Answer: c) June
Explanation:
March, May, and December all have 31 days. June has 30 days.
60. Find the odd geometric shape out.
Correct Answer: c) Circle
Explanation:
Triangle, Square, and Rectangle are polygons made entirely of straight lines. A circle is formed by a curved line.
61. Which subject is the odd one out?
Correct Answer: c) Geography
Explanation:
Physics, Chemistry, and Botany are branches of pure natural science. Geography is a social science / earth science.
62. Find the odd one out.
Correct Answer: c) Tomato
Explanation:
Carrot, Potato, and Beetroot grow underground (roots/tubers). Tomato grows above the ground.
63. Identify the odd object.
Correct Answer: c) Notebook
Explanation:
Pen, Pencil, and Marker are instruments used for writing. A Notebook is an object to be written upon.
64. Which instrument is the odd one out?
Correct Answer: c) Flute
Explanation:
Guitar, Violin, and Cello are stringed instruments. The Flute is a wind instrument.
65. Find the odd word.
Correct Answer: b) Argentina
Explanation:
Asia, Africa, and Australia are continents. Argentina is a country.
66. Find the odd number in the given group.
Correct Answer: d) 210
Explanation:
144 (12^2), 169 (13^2), and 196 (14^2) are perfect squares. 210 is not.
67. Identify the odd number.
Correct Answer: d) 144
Explanation:
27 (3^3), 64 (4^3), and 125 (5^3) are perfect cubes. 144 is a perfect square, not a perfect cube.
68. Which number does not belong in the group?
Correct Answer: d) 27
Explanation:
13, 17, and 23 are prime numbers. 27 is a composite number (divisible by 3 and 9).
69. Find the odd pair of letters.
Correct Answer: d) CD
Explanation:
AE, IO, and OU are pairs of vowels. CD is a pair of consonants.
70. Identify the odd pair of letters.
Correct Answer: d) ML
Explanation:
In ZX, VT, and RP, the gap between the letters is 1 (backward skip of 2). In ML, they are consecutive letters.
71. If APPLE is coded as 1-16-16-12-5, how is MAN coded?
Correct Answer: b) 13-1-14
Explanation:
The code uses the numerical alphabetical position of each letter. M=13, A=1, N=14.
72. If CAT = 24, DOG = 26, then BIRD = ?
Correct Answer: c) 33
Explanation:
The value is the sum of alphabetical positions. C(3)+A(1)+T(20)=24. B(2)+I(9)+R(18)+D(4) = 33.
73. If WATER is written as YCVGT, how is FIRE written?
Correct Answer: a) HKTG
Explanation:
Each letter is shifted forward by 2 (+2). F+2=H, I+2=K, R+2=T, E+2=G.
74. If GO = 32, SHE = 49, then SOME = ?
Correct Answer: a) 56
Explanation:
The code is the sum of the reverse alphabetical positions (A=26...Z=1). G=20, O=12 (sum=32). S=8, O=12, M=14, E=22. Sum = 8+12+14+22 = 56.
75. In a certain code, 'sky is blue' is '815', 'blue is color' is '516', what number stands for 'sky'?
Correct Answer: d) 8
Explanation:
Common word in both is 'blue' and 'is', matching '1' and '5'. The only unique word left for 'sky' in the first statement is '8'.
76. If A=1, B=3, C=5, D=7, what is the numerical value of PEN?
Correct Answer: a) 67
Explanation:
The letter positions (x) are mapped as 2x - 1. P(16) -> 31, E(5) -> 9, N(14) -> 27. Sum = 31 + 9 + 27 = 67.
77. In a certain code, MONKEY is XDJMNL. How is TIGER written in that code?
Correct Answer: a) QDFHS
Explanation:
The word is written backward and then each letter is shifted by -1. Y-1=X, E-1=D, K-1=J, etc. For TIGER: R-1=Q, E-1=D, G-1=F, I-1=H, T-1=S.
78. If DELHI is coded as 73541 and CALCUTTA as 82589662, how is CALICUT coded?
Correct Answer: a) 8251896
Explanation:
By direct substitution from the given words: C=8, A=2, L=5, I=1, C=8, U=9, T=6. Result is 8251896.
79. If M = 13, PEN = 35, then HOTEL = ?
Correct Answer: b) 60
Explanation:
The code is the simple sum of the alphabetical positions. P(16)+E(5)+N(14) = 35. H(8)+O(15)+T(20)+E(5)+L(12) = 60.
80. If POUND is written as MLRKA, how is ENGLISH written in that code?
Correct Answer: a) BKDIFPE
Explanation:
Each letter is shifted backward by 3 (-3). P-3=M... E-3=B, N-3=K, G-3=D, L-3=I, I-3=F, S-3=P, H-3=E.
81. Pointing to a photograph, a man said, 'I have no brother or sister but that man's father is my father's son.' Whose photograph was it?
Correct Answer: b) His son's
Explanation:
Since he has no brother or sister, 'my father's son' is the man himself. Therefore, the man in the photograph's father is the speaker. The photograph is of his son.
82. A is B's brother. C is A's mother. D is C's father. E is B's son. How is D related to A?
Correct Answer: b) Grandfather
Explanation:
C is A's mother, and D is C's father. Therefore, D is the father of A's mother, which makes D the maternal grandfather of A.
83. Introducing a girl, Vipin said, 'Her mother is the only daughter of my mother-in-law.' How is Vipin related to the girl?
Correct Answer: b) Father
Explanation:
The 'only daughter of my mother-in-law' refers to Vipin's wife. Therefore, the girl's mother is Vipin's wife, meaning Vipin is the girl's father.
84. A man said to a woman, 'Your mother's husband's sister is my aunt.' How is the woman related to the man?
Correct Answer: a) Sister
Explanation:
'Your mother's husband' means your father. His sister is the woman's aunt. If the woman's aunt is also the man's aunt, the man and the woman are siblings.
85. Pointing to a gentleman, Deepak said, 'His only brother is the father of my daughter's father.' How is the gentleman related to Deepak?
Correct Answer: b) Uncle
Explanation:
'My daughter's father' is Deepak himself. Therefore, the gentleman's only brother is Deepak's father. This makes the gentleman Deepak's uncle.
86. A man walks 5 km South, turns right and walks 3 km, turns right again and walks 5 km. Which direction is he from the starting point?
Correct Answer: d) West
Explanation:
He goes 5 km South. Turning right (facing West) he goes 3 km. Turning right again (facing North), he goes 5 km. He is now exactly 3 km West of his starting point.
87. Rahul travels 10 km North, turns left and travels 4 km, then again turns right and covers another 5 km. He then turns right and travels another 4 km. How far is he from the starting point?
Correct Answer: c) 15 km
Explanation:
He moves 10 km North, 4 km West, 5 km North, and 4 km East. The West and East movements cancel out. Total North distance = 10 + 5 = 15 km.
88. I am facing East. I turn 100 degrees in the clockwise direction and then 145 degrees in the anti-clockwise direction. Which direction am I facing now?
Correct Answer: b) North-East
Explanation:
Net movement = 145° (anti-clockwise) - 100° (clockwise) = 45° anti-clockwise. 45° anti-clockwise from East is North-East.
89. A walks 10m towards East, turns right and walks 10m. Then he turns left and walks 5m, again turns left and walks 10m. How far is he from the starting point?
Correct Answer: c) 15m
Explanation:
10m East, 10m South, 5m East, 10m North. The South and North movements cancel out. Total East movement = 10m + 5m = 15m.
90. If South-East becomes North, North-East becomes West and so on. What will West become?
Correct Answer: c) South-East
Explanation:
The compass has shifted 135 degrees anti-clockwise (South-East to North). Therefore, West shifts 135 degrees anti-clockwise to become South-East.
91. Statements: All cats are dogs. Some dogs are rats. Conclusions: I. Some cats are rats. II. Some rats are dogs.
Correct Answer: b) Only Conclusion II follows
Explanation:
From 'Some dogs are rats', its converse 'Some rats are dogs' directly follows. We cannot establish a definite link between cats and rats.
92. Statements: All pens are pencils. No pencil is a monkey. Conclusions: I. No pen is a monkey. II. Some pens are monkeys.
Correct Answer: a) Only Conclusion I follows
Explanation:
Since all pens are contained within pencils, and no pencil touches the monkey group, no pen can be a monkey. Conclusion I is strictly true.
93. Statements: Some books are magazines. Some magazines are novels. Conclusions: I. Some books are novels. II. Some novels are magazines.
Correct Answer: b) Only Conclusion II follows
Explanation:
'Some magazines are novels' directly implies 'Some novels are magazines'. There is no guaranteed intersection between books and novels.
94. Statements: All trees are forests. All forests are woods. Conclusions: I. All trees are woods. II. All woods are trees.
Correct Answer: a) Only Conclusion I follows
Explanation:
A chain of 'All' implies the subset belongs to the largest set (trees -> forests -> woods), so all trees are woods. The reverse is not necessarily true.
95. Statements: All birds are animals. All fishes are animals. Conclusions: I. All birds are fishes. II. Some fishes are birds.
Correct Answer: d) Neither Conclusion I nor II follows
Explanation:
Both birds and fishes are subsets of animals, but their circles do not have to overlap. Therefore, neither conclusion logically follows with certainty.
96. If '+' means '-', '-' means '*', '*' means '/', and '/' means '+', what is the value of 10 * 5 / 3 - 2 + 3?
Correct Answer: a) 5
Explanation:
Substituting signs: 10 / 5 + 3 * 2 - 3. Applying BODMAS: 2 + 6 - 3 = 5.
97. Arrange the following words in a logical sequence: 1. Birth 2. Death 3. Funeral 4. Marriage 5. Education.
Correct Answer: a) 1, 5, 4, 2, 3
Explanation:
The chronological order of life events is: Birth (1), Education (5), Marriage (4), Death (2), and finally Funeral (3).
98. If in a row of students, Ravi is 9th from the left and 14th from the right, how many students are there in the row?
Correct Answer: b) 22
Explanation:
Total number of students = (Position from left + Position from right) - 1. So, 9 + 14 - 1 = 22.
99. In a certain code, '253' means 'books are old', '546' means 'man is old' and '378' means 'buy good books'. What digit stands for 'are'?
Correct Answer: a) 2
Explanation:
Comparing '253' and '546', 'old' is '5'. Comparing '253' and '378', 'books' is '3'. Therefore, 'are' is the remaining digit '2'.
100. Choose the word which cannot be formed from the letters of the word 'CHARACTER'.
Correct Answer: c) HEARTY
Explanation:
The word HEARTY cannot be formed because the letter 'Y' is not present in the word CHARACTER.
