Find the next number in the series: 2, 6, 12, 20, 30, 42, ? MCQ with Answer and Explanation

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Find the next number in the series: 2, 6, 12, 20, 30, 42, ?

A. 50

B. 60

C. 56

D. 52

Answer: Option C

Solution (By JKSSB Mock Tests)

Differences are +4, +6, +8, +10, +12; next difference is +14. 42+14=56.

This question belongs to: Reasoning Logical Reasoning

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Question #1

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Statements: All books are pens. Some pens are erasers. Conclusions: I. Some books are erasers. II. Some erasers are pens.

A. Either I or II follows

B. Only I follows

C. Neither I nor II follows

D. Only II follows

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Correct Answer: Option D

Explanation:
From All books are pens and Some pens are erasers, the some pens that are erasers may or may not include books. So I does not follow. II is the conversion of the second statement and follows.

This question belongs to: Reasoning Logical Reasoning

Question #2

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A is the sister of B. B is the brother of C. C is the son of D. How is A related to D?

A. Mother

B. Son

C. Daughter

D. Sister

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Correct Answer: Option C

Explanation:
A, B, C children of D. A is daughter of D.

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Question #3

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Statements: All tigers are animals. Some animals are wild. Conclusions: I. Some tigers are wild. II. Some wild are animals.

A. Only I follows

B. Neither follows

C. Only II follows

D. Both follow

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Correct Answer: Option C

Explanation:
The term 'tigers' is not distributed with wild in the premises, so I does not follow. Conversion of 'Some animals are wild' gives II.

This question belongs to: Reasoning Logical Reasoning

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