Find the odd one out: 3, 5, 7, 9, 11 MCQ with Answer and Explanation

Find the odd one out: 3, 5, 7, 9, 11
A. 11
B. 9
C. 3
D. 5
Answer: Option B
Solution (By JKSSB Mock Tests)
All others are prime numbers; 9 is a composite number.

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Practice More Mental Reasoning Questions

Question #1
If IN is coded as JO and AT as BU, then TO is coded as?
A. VP
B. TP
C. UP
D. UQ

Correct Answer: Option C


Explanation:
The rule is shifting each letter forward by 1: I→J, N→O and A→B, T→U; so T→U, O→P, giving UP.

This question belongs to: Reasoning Mental Reasoning
Question #2
Find the missing term: 3, 6, 9, 12, 15, ?
A. 20
B. 18
C. 16
D. 21

Correct Answer: Option B


Explanation:
The terms increase by 3 each time: 15+3=18.

This question belongs to: Reasoning Mental Reasoning
Question #3
How many pairs of letters are there in the word 'SCHEDULE' which have as many letters between them in the word as in the alphabet?
A. None
B. Three
C. One
D. Two

Correct Answer: Option D


Explanation:
S-C-H-E-D-U-L-E. Pairs: C and E (one letter H between, in alphabet D between? No. D and E consecutive. E and L? Looking carefully: S and U have T between in alphabet and H E D between in word no. Standard for SCHEDULE: pairs are C-E, D-E, E-L? C to E: positions in word 2 and 4, one letter between; in alphabet C D E one between. Yes. Another is D and L? Perhaps two pairs: CE and DE (consecutive in both).

This question belongs to: Reasoning Mental Reasoning