Find the odd one out: 2, 5, 10, 17, 26, 37, 50, 64 MCQ with Answer and Explanation

Find the odd one out: 2, 5, 10, 17, 26, 37, 50, 64
A. 64
B. 50
C. 37
D. 26
Answer: Option A
Solution (By JKSSB Mock Tests)
Pattern +3,+5,+7,+9,+11,+13,+15. 50+15=65, but given 64 which is wrong. Hence 64 is odd.

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Practice More Mental Reasoning Questions

Question #1
Find the missing term: 2, 3, 6, 11, 18, ?
A. 26
B. 27
C. 28
D. 25

Correct Answer: Option B


Explanation:
Differences are +1, +3, +5, +7, so next difference is +9: 18+9=27.

This question belongs to: Reasoning Mental Reasoning
Question #2
If 'A × B' means A is to the south of B; 'A + B' means A is to the north of B; 'A $ B' means A is to the east of B; 'A % B' means A is to the west of B; then in P % Q + R $ S, S is in which direction with respect to Q?
A. South-West
B. North-East
C. South-East
D. North-West

Correct Answer: Option C


Explanation:
P is west of Q. Q is north of R. R is east of S. So S is west of R, R is south of Q, so S is south-west of Q? From Q south to R, then west to S, so S is South-West of Q. Option A.

This question belongs to: Reasoning Mental Reasoning
Question #3
Complete the series: 5, 6, 9, 15, 25, ?
A. 41
B. 40
C. 50
D. 45

Correct Answer: Option A


Explanation:
Pattern: +1, +3, +6, +10, +15 (triangular numbers). 25+16? Differences of differences +2,+3,+4,+5 so next difference +15? 1,3,6,10,15. Yes 25+15=40. Option A.

This question belongs to: Reasoning Mental Reasoning