Find the odd one out: 2, 9, 28, 65, 126, 217 MCQ with Answer and Explanation

Find the odd one out: 2, 9, 28, 65, 126, 217
A. 9
B. 28
C. 65
D. 126
Answer: Option A
Solution (By JKSSB Mock Tests)
Pattern n³+1: 1³+1=2, 2³+1=9, 3³+1=28, 4³+1=65, 5³+1=126, 6³+1=217. All fit. No odd. Wait, all follow. Perhaps 2=1³+1,9=2³+1 yes. Maybe different series. For odd, perhaps one that does not fit a different pattern.

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Practice More Mental Reasoning Questions

Question #1
Find the missing number: 2, 4, 12, 48, ?
A. 144
B. 288
C. 192
D. 240

Correct Answer: Option D


Explanation:
Pattern multiplies by 2, 3, 4, 5 successively. Next term = 48 × 5 = 240.

This question belongs to: Reasoning Mental Reasoning
Question #2
BDFH : EGIK :: JLNP : ?
A. MOPR
B. MOQS
C. LNPR
D. MOQR

Correct Answer: Option B


Explanation:
Each letter is shifted 3 places forward. J+3=M, L+3=O, N+3=Q, P+3=S, so JLNP becomes MOQS.

This question belongs to: Reasoning Mental Reasoning
Question #3
Statements: Some books are novels. All novels are magazines. Conclusions: I. Some books are magazines. II. All magazines are novels.
A. Only I follows
B. Neither follows
C. Only II follows
D. Both follow

Correct Answer: Option A


Explanation:
Some books are novels and all novels are magazines ⇒ Some books are magazines. All magazines are novels does not follow. Only I.

This question belongs to: Reasoning Mental Reasoning