Logical sample questions

18 logical items with the correct answer and explanation.

1. Q1. What comes next? 2, 4, 8, 16, ?

   • A. 20
   • B. 24
   • C. 30
   • D. 32correct

   Each term doubles.

2. Q2. If all A are B, and some B are C, which MUST be true?

   • A. All A are C
   • B. Some A are C
   • C. No A are C
   • D. Cannot be determinedcorrect

   No certain link from A to C.

3. Q3. Sequence: 3, 6, 11, 18, 27, ?

   • A. 36
   • B. 38correct
   • C. 40
   • D. none of these

   Differences: 3, 5, 7, 9 → next difference 11 → 27 + 11 = 38.

4. Q4. Box A is heavier than B. C is lighter than B. Which is heaviest?

   • A. Acorrect
   • B. B
   • C. C
   • D. Cannot tell

   A > B > C.

5. Q5. A clock shows 3:15. The angle between the hands is?

   • A. 0°
   • B. 7.5°correct
   • C. 15°
   • D. 30°

   Hour hand at 3:15 is 7.5° past 3; minute hand on 3. → 7.5°

6. Q6. Five friends sit in a row. A is left of B. C is right of B. D is left of A. E is right of C. Who is in the middle?

   • A. A
   • B. Bcorrect
   • C. C
   • D. D

   Order: D, A, B, C, E

7. Q7. All bankers wear suits. Some suits are blue. Therefore:

   • A. All bankers wear blue suits
   • B. Some bankers wear blue suits
   • C. Some bankers might wear blue suitscorrect
   • D. No bankers wear blue suits

   Conclusion is only possible, not necessary.

8. Q8. If A>B and B>C, then:

   • A. C>A
   • B. A=C
   • C. A>Ccorrect
   • D. Cannot tell

   Transitive.

9. Q9. Next in series: 3, 6, 12, 24, ?

   • A. 36
   • B. 48correct
   • C. 52
   • D. 60

   Doubles each step.

10. Q10. Five friends sit in seats 1–5 in a row. A sits immediately left of B, B sits immediately left of C, and D sits immediately right of C. If A is in seat 1, who is in seat 5?

    • A. A
    • B. B
    • C. C
    • D. D
    • E. Ecorrect

    A=1, B=2, C=3, D=4 (immediately right of C). Only E is left for seat 5.

11. Q11. Series: 2, 5, 11, 23, ?

    • A. 41
    • B. 45
    • C. 47correct
    • D. 50

    n×2+1: 23×2+1=47.

12. Q12. If 'all cats are mammals' and 'no mammals lay eggs', then:

    • A. Some cats lay eggs
    • B. No cats lay eggscorrect
    • C. Cats might lay eggs
    • D. Cannot tell

    Valid syllogism.

13. Q13. Odd one out: Circle, Triangle, Sphere, Square.

    • A. Circle
    • B. Triangle
    • C. Spherecorrect
    • D. Square

    Sphere is 3D; others 2D.

14. Q14. Next: A, C, F, J, ?

    • A. M
    • B. N
    • C. Ocorrect
    • D. P

    Gaps grow: +2,+3,+4,+5 → O.

15. Q15. If today is Wednesday, what day will it be 100 days from now?

    • A. Fridaycorrect
    • B. Saturday
    • C. Sunday
    • D. Monday

    100 mod 7 = 2; Wed + 2 = Fri.

16. Q16. All Xs are Ys. Some Ys are Zs. Therefore:

    • A. Some Xs are Zs
    • B. No Xs are Zs
    • C. Some Xs might be Zscorrect
    • D. All Xs are Zs

    Only possible.

17. Q17. Code: APPLE = 1-16-16-12-5. Then PEAR = ?

    • A. 16-5-1-18correct
    • B. 16-5-1-17
    • C. 17-5-1-18
    • D. 16-5-2-18

    Letter→position.

18. Q18. Next number: 1, 4, 9, 16, ?

    • A. 20
    • B. 23
    • C. 25correct
    • D. 27

    Squares: 5² = 25.