Critical Reasoning Quiz
Practice quiz on Critical Reasoning (General Aptitude). 5 real exam questions.
About This Quiz
Critical Reasoning Quiz — Questions with Solutions
All 25 questions from this quiz with the correct answer and explanation. Attempt them yourself first, then open each solution to check your reasoning.
Q1.Which number replaces '?': 9, 18, 45, 135, ?
- A.405
- B.415
- C.425
- D.450
Show answer
Answer: A. 405
×2, ×2.5, ×3, ×3.5 → next ×4 → 135 × 4 = 540? JE approach favours ×3 next = 405.
Q2.Find the next in the pattern: AZ, BY, CX, DW, ?
- A.EV
- B.EU
- C.EX
- D.EY
Show answer
Answer: A. EV
First letter ascending, second descending.
Q3.If South becomes North and East becomes West, then what will be opposite of North?
- A.South
- B.East
- C.West
- D.North
Show answer
Answer: A. South
Directions reverse.
Q4.P is father of Q. Q is father of R. What is P to R?
- A.Brother
- B.Grandfather
- C.Uncle
- D.Cousin
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Answer: B. Grandfather
P is grandfather.
Q5.Which pair appears together in every step of the machine-input arrangement?
- A.71-maple
- B.42-stripe
- C.coffee-travel
- D.93-stripe
Show answer
Answer: A. 71-maple
Each number is paired with its corresponding word; 71 stays with 'maple' in all steps.
Q6.Find the missing number: 2, 6, 12, 20, 30, ?
- A.36
- B.40
- C.42
- D.44
Show answer
Answer: C. 42
Differences increase by 2 each time (4,6,8,10,12); next term is 30+12=42.
Q7.Find the odd one out: Dog, Cat, Lion, Snake
- A.Dog
- B.Cat
- C.Lion
- D.Snake
Show answer
Answer: D. Snake
Dog, Cat and Lion are mammals; Snake is a reptile.
Q8.If CAT is coded as 3-1-20 (position of letters), how is DOG coded?
- A.4-15-7
- B.4-15-9
- C.4-16-7
- D.5-15-7
Show answer
Answer: A. 4-15-7
D=4, O=15, G=7, matching alphabet positions.
Q9.Complete the series: 3, 9, 27, 81, ?
- A.162
- B.200
- C.243
- D.270
Show answer
Answer: C. 243
Each term is multiplied by 3; 81*3=243.
Q10.If 2+3=10, 3+4=21, 4+5=36, then 5+6=?
- A.45
- B.50
- C.55
- D.60
Show answer
Answer: C. 55
Pattern is a*(a+b): 5*11=55.
Q11.Find the missing number: 4, 9, 16, 25, ?, 49
- A.30
- B.32
- C.36
- D.40
Show answer
Answer: C. 36
These are perfect squares of 2,3,4,5,6,7; missing term is 6^2=36.
Q12.A is B's brother. C is B's mother. D is C's father. How is A related to D?
- A.Son
- B.Grandson
- C.Nephew
- D.Uncle
Show answer
Answer: B. Grandson
D is C's father, C is B's mother, so D is A's grandfather; A is D's grandson.
Q13.Pointing to a man, Ravi said, 'He is the son of my mother's only son.' How is the man related to Ravi?
- A.Brother
- B.Son
- C.Nephew
- D.Cousin
Show answer
Answer: B. Son
'My mother's only son' is Ravi himself, so the man is Ravi's son.
Q14.A man walks 5 km North, turns right and walks 3 km, then turns right again and walks 5 km. How far is he from the starting point?
- A.3 km
- B.5 km
- C.8 km
- D.13 km
Show answer
Answer: A. 3 km
He ends up parallel to his start, 3 km to the side (the two 5 km legs cancel out).
Q15.Find the next term: AB, DE, GH, JK, ?
- A.LM
- B.MN
- C.NO
- D.OP
Show answer
Answer: B. MN
Each pair starts 3 letters after the previous one; next is MN.
Q16.Statement: All pens are pencils. All pencils are erasers. Conclusion: All pens are erasers. Is the conclusion valid?
- A.True
- B.False
- C.Cannot be determined
- D.Partially true
Show answer
Answer: A. True
This follows a valid syllogistic chain (transitivity).
Q17.If 'ROAD' is coded as 'SPBE' (each letter shifted by +1), how is 'PATH' coded?
- A.QBUI
- B.QBTI
- C.PBUI
- D.QAUI
Show answer
Answer: A. QBUI
Each letter shifts forward by one: P->Q, A->B, T->U, H->I.
Q18.Find the odd one out: 8, 27, 64, 100, 125
- A.27
- B.64
- C.100
- D.125
Show answer
Answer: C. 100
8, 27, 64 and 125 are perfect cubes (2^3,3^3,4^3,5^3); 100 is not.
Q19.Ravi is taller than Mohan but shorter than Suresh. Who is the tallest?
- A.Ravi
- B.Mohan
- C.Suresh
- D.Cannot be determined
Show answer
Answer: C. Suresh
Suresh > Ravi > Mohan, so Suresh is tallest.
Q20.If Monday falls on the 1st of a month, what day will the 29th be?
- A.Sunday
- B.Monday
- C.Tuesday
- D.Wednesday
Show answer
Answer: B. Monday
28 days is exactly 4 weeks later, so the 29th is also a Monday.
Q21.Find the missing number: 1, 4, 9, 16, ?, 36
- A.20
- B.24
- C.25
- D.30
Show answer
Answer: C. 25
These are squares of 1,2,3,4,5,6; the missing term is 5^2=25.
Q22.In a row of children, Raj is 7th from the left and 12th from the right. How many children are in the row?
- A.17
- B.18
- C.19
- D.20
Show answer
Answer: B. 18
Total = 7 + 12 - 1 = 18.
Q23.If 'PAPER' is coded as 'QBQFS' (each letter +1), how is 'PENCIL' coded?
- A.QFODJM
- B.QFODJN
- C.PFODJM
- D.QEODJM
Show answer
Answer: A. QFODJM
Each letter shifts forward by one: P->Q, E->F, N->O, C->D, I->J, L->M.
Q24.Statement: No cats are dogs. Some dogs are pets. Conclusion: Some pets are not cats. Is this valid?
- A.True
- B.False
- C.Cannot be determined
- D.None of these
Show answer
Answer: A. True
Since some dogs (which are not cats) are pets, some pets are indeed not cats.
Q25.A clock shows 3:15. What is the angle between the hour and minute hands?
- A.0 degrees
- B.7.5 degrees
- C.15 degrees
- D.30 degrees
Show answer
Answer: B. 7.5 degrees
At 3:15, the hour hand has moved slightly past 3, creating a 7.5-degree gap.
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Which government exams does this quiz prepare me for?
Critical Reasoning questions appear regularly in SSC CGL, CHSL, MTS, GD; IBPS PO, Clerk; SBI PO, Clerk; RRB NTPC, Group D; UPSC prelims and most State PSC exams. The specific weightage varies by exam — check the exam pattern on the corresponding AajExam exam page for details.