200 One-Liner Questions on Reasoning and Puzzles
This file contains 200 one-liner questions and their answers, designed for quick practice and revision for competitive exams.
1. Question: If A is to the immediate left of B in a line, who is on B’s right?
Answer: A is on B’s left, so there is no one immediately on B’s right from A’s perspective. The question is based on relative position.
2. Question: Eight people sit in a circle. If A is opposite B, and B is opposite C, who is opposite A?
Answer: C
3. Question: If you face East and turn 90° clockwise, what direction are you facing?
Answer: South
4. Question: Complete the series: 2, 4, 8, 16, ?
Answer: 32 (Each number is doubled)
5. Question: What is the opposite of ‘Black’ according to coding rules?
Answer: White (This is a simple analogy)
6. Question: If ‘CAT’ is coded as ‘3120’, what is ‘DOG’?
Answer: 4157 (D=4, O=15, G=7)
7. Question: If A is the father of B, and B is the sister of C, how is C related to A?
Answer: Son or Daughter
8. Question: Find the odd one out: 2, 3, 5, 8, 11
Answer: 8 (It is a composite number, all others are prime)
9. Question: A walks 10m North, then turns right and walks 5m. In which direction is A from the starting point?
Answer: North-East
10. Question: If all books are pens, and some pens are pencils, are all books pencils?
Answer: No
11. Question: In a row, A is 10th from the left, B is 15th from the right. If they swap positions, A is 20th from the left. What is the total number of people in the row?
Answer: 34
12. Question: If 5 people are on different floors from 1 to 5, and A is on the top floor, what floor is A on?
Answer: 5th Floor
13. Question: What comes next in the sequence: A, C, E, G, ?
Answer: I
14. Question: If ‘Monday’ is a code for ‘Sunday’, then ‘Friday’ is a code for what?
Answer: Thursday (One day before)
15. Question: A is the brother of B, and B is the wife of C. How is A related to C?
Answer: Brother-in-law
16. Question: A is sitting between B and C. In which direction is B sitting with respect to C?
Answer: Not enough information to determine.
17. Question: If ‘Z’ is coded as ‘A’, ‘Y’ as ‘B’, what is ‘Coded’ as?
Answer: WNBWJ (Reverse Alphabetical Order)
18. Question: Find the odd one out: Car, Bus, Train, Helicopter
Answer: Helicopter (It travels in the air)
19. Question: A walks 10m South, turns left and walks 10m. He then turns right. What direction is he facing?
Answer: West
20. Question: If some apples are bananas, and all bananas are fruits, are all apples fruits?
Answer: No, some apples are fruits.
21. Question: Complete the series: 1, 3, 6, 10, ?
Answer: 15 (Add 2, 3, 4, 5)
22. Question: What is the relation between a grandfather’s son and you?
Answer: Father or Uncle
23. Question: Find the odd one out: 1, 4, 9, 16, 20
Answer: 20 (It is not a perfect square)
24. Question: A faces South and turns 135° anti-clockwise. Which direction is A facing now?
Answer: North-East
25. Question: In a row, A is 5th from the left and B is 6th from the right. If they are adjacent, what is the total number of people?
Answer: 11 or 9
26. Question: If ‘123’ means ‘Cold Day’, and ‘456’ means ‘Hot Water’, what does ’14’ mean?
Answer: Cold Water (Combining the first word from ‘123’ and the second from ‘456’)
27. Question: What comes next in the series: Z, X, V, T, ?
Answer: R
28. Question: A lives on the 3rd floor. B lives two floors above A. What floor is B on?
Answer: 5th Floor
29. Question: A is the son of B. B is the mother of C. C is the brother of D. How is D related to A?
Answer: Brother or Sister
30. Question: Find the odd one out: Square, Circle, Triangle, Rectangle
Answer: Circle (It has no straight lines or angles)
31. Question: If ‘Sun’ is coded as ‘211114’, what is ‘Moon’?
Answer: 13151514
32. Question: A is to the left of B, B is to the left of C. Who is in the middle?
Answer: B
33. Question: If all men are tall, and A is a man, is A tall?
Answer: Yes
34. Question: A walks 5m East, turns right, and walks 5m. In what direction is he heading now?
Answer: South
35. Question: Complete the series: 1, 2, 4, 7, 11, ?
Answer: 16 (Add 1, 2, 3, 4, 5)
36. Question: Find the odd one out: January, February, July, December
Answer: February (It has 28 or 29 days)
37. Question: If ‘Brother’ is ‘Sister’, and ‘Father’ is ‘Mother’, what is ‘Son’?
Answer: Daughter (Based on gender reversal)
38. Question: A is taller than B. C is shorter than B. Who is the tallest?
Answer: A
39. Question: In a circle, A is sitting between B and C. If A is facing the center, what is the relative position?
Answer: B and C are on either side of A.
40. Question: What is the relation between a sister’s husband and you?
Answer: Brother-in-law
41. Question: If a clock shows 3:00, what is the angle between the hour and minute hands?
Answer: 90°
42. Question: Find the odd one out: Lion, Tiger, Leopard, Elephant
Answer: Elephant (It is a herbivore, others are carnivores)
43. Question: If ‘Delhi’ is coded as ‘IDLHE’, what is ‘Bombay’?
Answer: YABOM (Reverse the letters of the word)
44. Question: A is to the immediate right of B. C is to the immediate left of B. Who is in the middle?
Answer: B
45. Question: If ‘Some animals are birds’, what is the negation?
Answer: ‘No animals are birds’ or ‘All animals are not birds’
46. Question: What comes next in the series: AB, DE, GH, JK, ?
Answer: MN
47. Question: If A is 10th from the left in a row of 20 people, what is A’s position from the right?
Answer: 11th
48. Question: Find the odd one out: 2, 5, 10, 17, 26
Answer: None, it’s a series: n2+1
49. Question: A walks 10m West, turns left, and walks 10m. He then turns right. What direction is he facing?
Answer: West
50. Question: If ‘Sun’ is related to ‘Day’, what is ‘Moon’ related to?
Answer: Night
51. Question: A is the son of B. C is the father of B. How is A related to C?
Answer: Grandson
52. Question: Complete the series: 5, 10, 15, 20, ?
Answer: 25
53. Question: Find the odd one out: Sparrow, Pigeon, Crow, Duck
Answer: Duck (It lives in water)
54. Question: A is 20m from B. B is 10m from C. C is 5m from A. Are they in a straight line?
Answer: Not necessarily.
55. Question: A lives on a floor below B, and above C. Who lives on the middle floor?
Answer: A
56. Question: If ‘Apple’ is ‘Banana’, what is ‘Orange’?
Answer: Banana (Assuming the analogy is simple substitution)
57. Question: What comes next in the series: B, D, G, K, P, ?
Answer: V
58. Question: A is to the left of B, B is to the left of C. If they are in a circle, who is to the left of A?
Answer: C
59. Question: What is the relation between a sister’s daughter and you?
Answer: Niece
60. Question: If ‘RED’ is coded as ’20’, what is ‘BLUE’?
Answer: 24 (Sum of positions of the letters in the alphabet)
61. Question: A walks 5m East, then turns 45° left. In which direction is he heading now?
Answer: North-East
62. Question: Find the odd one out: Jupiter, Mars, Venus, Sun
Answer: Sun (It is a star, others are planets)
63. Question: If ‘All A are B’, what is the conversion?
Answer: ‘Some B are A’
64. Question: What comes next in the series: 3, 7, 13, 21, ?
Answer: 31 (Add 4, 6, 8, 10)
65. Question: A is the husband of B, and B is the mother of C. How is C related to A?
Answer: Son or Daughter
66. Question: If 4 people are sitting in a straight line and A is at one end, how many people are sitting between A and the person at the other end?
Answer: 2
67. Question: If ‘Cat’ is ‘Dog’, and ‘Dog’ is ‘Lion’, what is ‘Lion’?
Answer: Cat (The question is a cycle: Cat -> Dog, Dog -> Lion, Lion -> Cat)
68. Question: Find the odd one out: 1, 8, 27, 64, 100
Answer: 100 (It is not a perfect cube)
69. Question: A walks 15m North. Turns right and walks 10m. He then turns right again and walks 15m. In which direction is he from the starting point?
Answer: East
70. Question: What is the relation between a maternal uncle’s son and you?
Answer: Cousin
71. Question: A, B, C, D, E are sitting in a circle. If A is opposite B, and B is opposite C, who is opposite D?
Answer: E
72. Question: Complete the series: 1, 4, 9, 16, 25, ?
Answer: 36 (Perfect squares)
73. Question: If ‘Monday’ is ‘Sunday’, what is ‘Tuesday’?
Answer: Monday
74. Question: Find the odd one out: Red, Blue, Green, Yellow, Black
Answer: Black (It is not a primary or secondary color)
75. Question: A is taller than B, B is taller than C, and C is taller than A. Is this possible?
Answer: No
76. Question: If ‘LIGHT’ is coded as ‘GTHIL’, what is ‘WATER’?
Answer: ERWAT
77. Question: What comes next in the series: 1, 1, 2, 3, 5, 8, ?
Answer: 13 (Fibonacci sequence)
78. Question: A is B’s sister. C is A’s father. D is C’s wife. How is A related to D?
Answer: Daughter
79. Question: Find the odd one out: 12, 14, 16, 18, 21
Answer: 21 (It is not an even number)
80. Question: A walks 5m North. Turns left and walks 5m. Turns left again and walks 5m. In which direction is A from the starting point?
Answer: West
81. Question: If ‘Dog’ is ‘Cat’ and ‘Cat’ is ‘Mouse’, what is ‘Mouse’?
Answer: Cat
82. Question: A is sitting 3rd to the left of B in a circle of 6 people. Where is A with respect to B?
Answer: 3rd to the right of B (Opposite)
83. Question: Complete the series: 1, 8, 27, 64, ?
Answer: 125 (Perfect cubes)
84. Question: If ‘Apple’ is ‘Orange’, and ‘Orange’ is ‘Grape’, what is ‘Grape’?
Answer: Apple
85. Question: What is the relation between your father’s brother and you?
Answer: Uncle
86. Question: A is shorter than B, and B is shorter than C. Who is the shortest?
Answer: A
87. Question: Find the odd one out: 7, 11, 13, 17, 21
Answer: 21 (It is not a prime number)
88. Question: A walks 10m East, then turns right. What is his direction?
Answer: South
89. Question: A is the son of B. C is the daughter of B. D is the mother of C. What is the relation between A and D?
Answer: Son and Mother
90. Question: What comes next in the series: 10, 9, 7, 4, ?
Answer: 0 (Subtract 1, 2, 3, 4)
91. Question: A, B, C, D are in a line. A is at one end. B is between C and D. Who is at the other end?
Answer: C or D
92. Question: Find the odd one out: Grapes, Apple, Banana, Potato
Answer: Potato (It is a vegetable, others are fruits)
93. Question: If ‘123’ means ‘Cold Day’, and ‘345’ means ‘Hot Day’, what is ‘3’?
Answer: Day
94. Question: A is 5m West of B. B is 5m North of C. C is 5m East of D. In what direction is D from A?
Answer: South
95. Question: What is the relation between your mother’s brother’s daughter and you?
Answer: Cousin
96. Question: Find the odd one out: 25, 36, 49, 64, 80
Answer: 80 (It is not a perfect square)
97. Question: If A is 5th from the left, and there are 10 people in the row, what is B’s position if B is 2nd to the right of A?
Answer: 7th from the left
98. Question: Complete the series: 2, 6, 12, 20, 30, ?
Answer: 42 (Add 4, 6, 8, 10, 12)
99. Question: A is the son of B. B is the father of C. How are A and C related?
Answer: Brothers or Brother and Sister
100. Question: If ‘ABC’ is ‘DEF’, what is ‘GHI’?
Answer: JKL (Each letter is shifted by 3)
101. Question: Find the odd one out: Jupiter, Earth, Moon, Mars
Answer: Moon (It is a satellite, others are planets)
102. Question: A walks 10m East. Turns right and walks 10m. He then turns left and walks 5m. In which direction is he from the starting point?
Answer: South-East
103. Question: If a clock shows 6:00, what is the angle between the hour and minute hands?
Answer: 180°
104. Question: What is the relation between your father’s sister’s husband and you?
Answer: Uncle
105. Question: Complete the series: 1, 2, 6, 24, ?
Answer: 120 (Multiply by 2, 3, 4, 5)
106. Question: If ‘Sun’ is coded as ‘2114’, what is ‘Rain’?
Answer: 181914
107. Question: Find the odd one out: Eye, Ear, Nose, Hand
Answer: Hand (It is a limb, others are facial organs)
108. Question: A is 5m West of B, B is 10m West of C. How far is A from C?
Answer: 15m West
109. Question: If ‘Monday’ is ‘Tuesday’, and ‘Tuesday’ is ‘Wednesday’, what is ‘Sunday’?
Answer: Monday
110. Question: What is the relation between your mother’s father and you?
Answer: Maternal Grandfather
111. Question: Complete the series: 2, 3, 5, 7, 11, ?
Answer: 13 (Prime numbers)
112. Question: Find the odd one out: 1, 8, 27, 64, 100
Answer: 100 (It’s not a perfect cube)
113. Question: A is taller than B. C is taller than A. Who is the tallest?
Answer: C
114. Question: If all men are tall, and some tall people are thin, are all men thin?
Answer: No
115. Question: A walks 10m North. Turns right and walks 10m. Turns left and walks 10m. He then turns right and walks 10m. In which direction is he from the starting point?
Answer: North-East
116. Question: If ‘A’ is ‘Z’, what is ‘B’?
Answer: Y
117. Question: What comes next in the series: Z, Y, X, W, ?
Answer: V
118. Question: A is 10th from the left. B is 10th from the right. In a row of 10 people, what is their relation?
Answer: The row is not possible.
119. Question: Find the odd one out: 12, 16, 20, 24, 25
Answer: 25 (It is a perfect square)
120. Question: What is the relation between your father’s brother’s daughter and you?
Answer: Cousin
121. Question: A is the son of B. C is the brother of A. D is the mother of C. What is the relation between B and D?
Answer: Husband and Wife
122. Question: If ‘Cat’ is ‘Dog’, and ‘Dog’ is ‘Lion’, what is ‘Cat’?
Answer: Dog
123. Question: Find the odd one out: 121, 144, 169, 196, 225, 230
Answer: 230 (It is not a perfect square)
124. Question: A walks 10m East, turns left and walks 10m. What direction is he facing?
Answer: North
125. Question: What comes next in the series: A, E, I, O, ?
Answer: U (Vowels)
126. Question: A is sitting between B and C. D is to the right of C. Who is at the extreme right end?
Answer: D
127. Question: If ‘Chair’ is ‘Table’, and ‘Table’ is ‘Fan’, what is ‘Chair’?
Answer: Table
128. Question: What is the relation between a sister’s son and you?
Answer: Nephew
129. Question: Complete the series: 1, 3, 5, 7, 9, ?
Answer: 11 (Odd numbers)
130. Question: Find the odd one out: Jupiter, Venus, Earth, Sun, Moon
Answer: Sun (It is a star)
131. Question: A lives on the 5th floor. B lives on a floor below A. C lives on a floor above B. Who is on the highest floor?
Answer: A
132. Question: A walks 10m North, then turns right and walks 10m. What is his direction from the starting point?
Answer: North-East
133. Question: If ‘Sun’ is coded as ’21’, what is ‘Rain’?
Answer: 20
134. Question: What is the relation between your mother’s mother and you?
Answer: Maternal Grandmother
135. Question: Complete the series: 4, 9, 16, 25, 36, ?
Answer: 49 (Perfect squares)
136. Question: Find the odd one out: 2, 4, 6, 8, 9
Answer: 9 (It is an odd number)
137. Question: A is the daughter of B. B is the son of C. How is C related to A?
Answer: Grandfather or Grandmother
138. Question: A walks 10m East, turns left, and walks 10m. What direction is he facing?
Answer: North
139. Question: If ‘Apple’ is ‘Orange’, and ‘Orange’ is ‘Grape’, what is ‘Apple’?
Answer: Orange
140. Question: What is the relation between your father’s brother’s wife and you?
Answer: Aunt
141. Question: Find the odd one out: Book, Pen, Pencil, Table
Answer: Table (It is furniture, others are stationery)
142. Question: A, B, C, D, E are sitting in a circle. A is to the left of B, B is to the left of C. Who is to the left of D?
Answer: E
143. Question: If ‘123’ means ‘Cold Day’, and ‘145’ means ‘Cold Night’, what is ‘1’?
Answer: Cold
144. Question: A is 5m North of B, B is 5m North of C. How far is A from C?
Answer: 10m North
145. Question: What comes next in the series: A, B, D, G, K, ?
Answer: P (Add 1, 2, 3, 4, 5)
146. Question: A is the mother of B, and B is the son of C. How is A related to C?
Answer: Wife
147. Question: Find the odd one out: Lion, Tiger, Cat, Dog
Answer: Cat or Dog (They are domesticated)
148. Question: A walks 5m East, turns right, and walks 5m. In what direction is he heading now?
Answer: South
149. Question: If ‘Sun’ is ‘Mon’, and ‘Mon’ is ‘Tue’, what is ‘Tue’?
Answer: Wed
150. Question: What is the relation between your mother’s sister and you?
Answer: Aunt
151. Question: Complete the series: 1, 1, 2, 3, 5, 8, 13, ?
Answer: 21 (Fibonacci sequence)
152. Question: Find the odd one out: 1, 4, 9, 16, 25, 30
Answer: 30 (Not a perfect square)
153. Question: A is taller than B. B is shorter than C. Who is the tallest?
Answer: Not enough information.
154. Question: If some animals are dogs, and all dogs are mammals, are some animals mammals?
Answer: Yes
155. Question: A walks 10m West, turns left and walks 10m. In which direction is A from the starting point?
Answer: South-West
156. Question: If ‘Cat’ is coded as ’24’, what is ‘Dog’?
Answer: 26 (Sum of position of letters)
157. Question: What comes next in the series: J, L, N, P, ?
Answer: R
158. Question: A is 5m East of B, B is 10m North of C. In what direction is A from C?
Answer: North-East
159. Question: A is the daughter of B. C is the son of B. How are A and C related?
Answer: Sister and Brother
160. Question: Find the odd one out: Cow, Goat, Horse, Bear
Answer: Bear (It is omnivore, others are herbivores)
161. Question: A is sitting 3rd to the left of B in a line. What is their relative position?
Answer: A is 3 positions to the left of B.
162. Question: If ‘Monday’ is ‘Sunday’, what is ‘Saturday’?
Answer: Friday
163. Question: What is the relation between your father’s sister and you?
Answer: Aunt
164. Question: Find the odd one out: 1, 8, 64, 125
Answer: 64 (It is a perfect square and a perfect cube)
165. Question: A walks 10m North. Turns left and walks 10m. He then turns right and walks 5m. In which direction is he heading now?
Answer: North
166. Question: Complete the series: 2, 5, 10, 17, 26, ?
Answer: 37 (n2+1)
167. Question: If ‘Car’ is coded as ’24’, what is ‘Bus’?
Answer: 20 (Sum of positions)
168. Question: A is the husband of B. C is the sister of B. How is A related to C?
Answer: Brother-in-law
169. Question: A is sitting between B and C. D is to the left of B. Who is at the extreme left end?
Answer: D
170. Question: Find the odd one out: 12, 14, 16, 18, 20, 22, 23
Answer: 23 (It is not an even number)
171. Question: If a clock shows 9:00, what is the angle between the hands?
Answer: 90°
172. Question: What is the relation between your grandfather’s daughter and you?
Answer: Aunt or Mother
173. Question: Complete the series: 1, 2, 4, 8, 16, ?
Answer: 32 (Doubling)
174. Question: Find the odd one out: A, E, I, O, K
Answer: K (It is not a vowel)
175. Question: A walks 10m South. Turns left and walks 10m. In which direction is he from the starting point?
Answer: South-East
176. Question: If ‘Dog’ is ‘Cat’ and ‘Cat’ is ‘Lion’, what is ‘Dog’?
Answer: Cat
177. Question: A is 10th from the left, B is 10th from the right. In a row of 20 people, how many people are between them?
Answer: 0
178. Question: What comes next in the series: A, C, F, J, ?
Answer: O (Add 2, 3, 4, 5)
179. Question: A is the son of B. B is the father of C. D is the mother of C. How is D related to A?
Answer: Mother
180. Question: Find the odd one out: 12, 18, 24, 30, 35
Answer: 35 (Not a multiple of 6)
181. Question: If ‘Sun’ is coded as ‘192114’, what is ‘Rain’?
Answer: 181914
182. Question: A is 5m East of B, B is 5m North of C. How far is A from C?
Answer: 7.07m (Pythagorean theorem)
183. Question: If all books are pens, and some pens are pencils, are all pens pencils?
Answer: No
184. Question: A is to the immediate right of B. B is to the immediate right of C. Who is in the middle?
Answer: B
185. Question: A walks 5m North, then turns 90° right. What direction is he heading now?
Answer: East
186. Question: What is the relation between your mother’s brother’s wife and you?
Answer: Aunt
187. Question: Complete the series: 3, 5, 8, 12, 17, ?
Answer: 23 (Add 2, 3, 4, 5, 6)
188. Question: Find the odd one out: January, June, July, August, November
Answer: November (It has 30 days)
189. Question: A lives on a floor below B and above C. What is the order from top to bottom?
Answer: B, A, C
190. Question: What is the relation between your father’s father and you?
Answer: Paternal Grandfather
191. Question: Complete the series: 10, 20, 30, 40, ?
Answer: 50
192. Question: Find the odd one out: 1, 16, 81, 256, 300
Answer: 300 (Not a perfect fourth power)
193. Question: If ‘Table’ is coded as ‘201211125’, what is ‘Chair’?
Answer: 3819118 (Based on letter positions)
194. Question: A is 10m North of B, B is 10m West of C. In what direction is A from C?
Answer: North-West
195. Question: A is the daughter of B. C is the mother of A. D is the husband of C. How is D related to B?
Answer: D and B are the same person.
196. Question: If a clock shows 12:00, what is the angle between the hands?
Answer: 0°
197. Question: Find the odd one out: Square, Rectangle, Rhombus, Circle
Answer: Circle (No straight lines)
198. Question: A walks 10m North. Turns left and walks 10m. He then turns left again and walks 10m. How far is A from the starting point?
Answer: 10m
199. Question: What is the relation between your father’s sister’s daughter and you?
Answer: Cousin
200. Question: Complete the series: 100, 81, 64, 49, ?
Answer: 36 (Perfect squares in descending order)