Find the next number in the series: 1, 3, 7, 15, 31, ? MCQ with Answer and Explanation

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Find the next number in the series: 1, 3, 7, 15, 31, ?

A. 65

B. 62

C. 63

D. 64

Answer: Option C

Solution (By JKSSB Mock Tests)

Pattern: double and add 1. 31×2+1=63.

This question belongs to: Reasoning Logical Reasoning

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Practice More Logical Reasoning Questions

Question #1

Find the next number: 6, 11, 21, 40, 76, ?

A. 150

B. 152

C. 148

D. 146

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Correct Answer: Option D

Explanation:
6×2−1=11, 11×2−1=21, 21×2−2=40, 40×2−4=76, 76×2−6=146.

This question belongs to: Reasoning Logical Reasoning

Question #2

A man walks 3 km North, then turns right and walks 2 km, then turns right and walks 3 km, then turns left and walks 1 km. In which direction is he from the starting point?

A. West

B. North

C. East

D. South

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Correct Answer: Option C

Explanation:
North 3, right East 2, right South 3, left East 1. Net East 3 km.

This question belongs to: Reasoning Logical Reasoning

Question #3

If 'NORTH' is coded as 'OPSUI', then 'SOUTH' is coded as ?

A. TPVUJ

B. TPVTI

C. TPWUI

D. TPVUI

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Correct Answer: Option D

Explanation:
Each letter is shifted one place forward: S→T, O→P, U→V, T→U, H→I = TPVUI.

This question belongs to: Reasoning Logical Reasoning

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