Find the missing term: 3, 5, 9, 17, 33, ? MCQ with Answer and Explanation

Find the missing term: 3, 5, 9, 17, 33, ?
A. 63
B. 65
C. 66
D. 64
Answer: Option B
Solution (By JKSSB Mock Tests)
Each term is multiplied by 2 and 1 subtracted: 3×2-1=5, 5×2-1=9, 9×2-1=17, 17×2-1=33, so 33×2-1=65.

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Practice More Mental Reasoning Questions

Question #1
Find the missing term: 240, 120, 60, 30, ?
A. 10
B. 15
C. 20
D. 5

Correct Answer: Option B


Explanation:
Each term is divided by 2: 30÷2=15.

This question belongs to: Reasoning Mental Reasoning
Question #2
A, B, C, D, E and F are sitting in a circle facing the centre. A is between D and E. C is between B and F. Who is sitting to the immediate left of B if D is to the immediate left of C?
A. C
B. Cannot be determined
C. F
D. A

Correct Answer: Option C


Explanation:
D left of C (facing centre, left is clockwise or depending convention). One possible: D C F B ... etc. Immediate left of B is F in valid arrangement.

This question belongs to: Reasoning Mental Reasoning
Question #3
If 3 is coded as 6, 4 as 12, 5 as 20, then 6 is coded as?
A. 36
B. 30
C. 42
D. 24

Correct Answer: Option B


Explanation:
The pattern is n×(n-1): 3×2=6, 4×3=12, 5×4=20, so 6×5=30.

This question belongs to: Reasoning Mental Reasoning