20 Logical Reasoning Questions for Class 6 (Foundation for IIT Aspirants)

By Sandeep -

Logical reasoning helps students develop thinking skills needed for exams like Olympiads and future competitive exams such as IIT-JEE.

In this post, you will learn 20 important reasoning questions with easy explanations.

🔢 Section 1: Number Series

Q1. What comes next?
2, 4, 6, 8, ___

Answer: 10
Explanation: Numbers increase by +2 each time.

Q2. Find the missing number
5, 10, 20, 40, ___

Answer: 80
Explanation: Each number is multiplied by 2.

Q3. What comes next?
1, 3, 6, 10, ___

Answer: 15
Explanation: Pattern is +2, +3, +4, +5.

Q4. Find the missing number
7, 14, 28, ___

Answer: 56
Explanation: Multiply by 2.

Q5. What comes next?
9, 18, 27, ___

Answer: 36
Explanation: Add 9 each time.

🔠 Section 2: Alphabet Series

Q6. A, C, E, G, ___

Answer: I
Explanation: Skipping one letter each time.

Q7. B, D, F, H, ___

Answer: J
Explanation: +2 letters pattern.

Q8. Z, X, V, T, ___

Answer: R
Explanation: Reverse order (-2 letters).

Q9. A, D, G, ___

Answer: J
Explanation: Jump of 3 letters.

Q10. M, O, Q, ___

Answer: S
Explanation: +2 letters pattern.

🔢 Section 3: Odd One Out

Q11. Find the odd number
2, 4, 6, 9, 8

Answer: 9
Explanation: All are even except 9.

Q12. Find the odd word
Cat, Dog, Tiger, Car

Answer: Car
Explanation: Others are animals.

Q13. 5, 10, 15, 22, 20

Answer: 22
Explanation: Others are multiples of 5.

Q14. Apple, Mango, Potato, Banana

Answer: Potato
Explanation: Others are fruits.

Q15. 3, 6, 9, 12, 14

Answer: 14
Explanation: Not a multiple of 3.

🔄 Section 4: Coding-Decoding

Q16. If CAT = DBU, then DOG = ?

Answer: EPH
Explanation: Each letter moves +1 forward.

Q17. If BAT = CBU, then BALL = ?

Answer: CBMM
Explanation: Each letter shifts +1.

Q18. If SUN = TVO, then MOON = ?

Answer: NPP O
Explanation: Each letter +1.

Q19. If PEN = QFO, then BOOK = ?

Answer: CPPL
Explanation: Each letter +1.

Q20. If CAR = DZS, then BUS = ?

Answer: CVT
Explanation: Mixed pattern (+1 or reverse shift).

🎯 Conclusion

These questions help improve:

  • Logical thinking
  • Pattern recognition
  • Problem-solving skills

👉 Practice daily to build a strong foundation for future competitive exams like IIT.

📌 Keywords (for SEO)

Reasoning questions for Class 6, Logical reasoning for kids, IIT foundation questions, Number series questions, Coding decoding for beginners

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