5 : 125 :: 6 : ? MCQ with Answer and Explanation

5 : 125 :: 6 : ?
A. 216
B. 180
C. 196
D. 256
Answer: Option A
Solution (By JKSSB Mock Tests)
The relation is n^3. 5^3 = 125; 6^3 = 216.

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Practice More Mental Reasoning Questions

Question #1
Statements: All books are pens. Some pens are pencils. Conclusions: I. Some pencils are books. II. Some pens are books.
A. Either I or II follows
B. Neither I nor II follows
C. Only I follows
D. Only II follows

Correct Answer: Option D


Explanation:
All books are pens ⇒ Some pens are books (conversion). Some pens are pencils does not imply any relation between pencils and books. Hence only II follows.

This question belongs to: Reasoning Mental Reasoning
Question #2
Find the missing term: 9, 16, 25, 36, ?
A. 47
B. 64
C. 81
D. 49

Correct Answer: Option D


Explanation:
The terms are consecutive squares: 3²=9, 4²=16, 5²=25, 6²=36, so next is 7²=49.

This question belongs to: Reasoning Mental Reasoning
Question #3
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. North-West
B. North-East
C. South-East
D. South-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