Find the missing term: 1, 4, 13, 40, ? MCQ with Answer and Explanation

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Find the missing term: 1, 4, 13, 40, ?

A. 122

B. 121

C. 119

D. 120

Answer: Option B

Solution (By JKSSB Mock Tests)

Each term is multiplied by 3 and 1 added: 1×3+1=4, 4×3+1=13, 13×3+1=40, so 40×3+1=121.

This question belongs to: Reasoning Mental Reasoning

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Practice More Mental Reasoning Questions

Question #1

If 1st January 2008 is Tuesday, what day of the week will be 1st January 2009?

A. Thursday

B. Saturday

C. Wednesday

D. Friday

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Correct Answer: Option A

Explanation:
2008 is a leap year. From 1 Jan 2008 to 1 Jan 2009 is 366 days = 52 weeks + 2 days. Tuesday +2 = Thursday.

This question belongs to: Reasoning Mental Reasoning

Question #2

Find the missing term: 80, 40, 20, 10, ?

A. 5

B. 4

C. 2

D. 8

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Correct Answer: Option A

Explanation:
Each term is divided by 2: 80÷2=40, 40÷2=20, 20÷2=10, so next is 10÷2=5.

This question belongs to: Reasoning Mental Reasoning

Question #3

Find the odd one out: 3, 7, 11, 15, 19

A. 11

B. 15

C. 7

D. 19

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Correct Answer: Option B

Explanation:
All others are prime numbers; 15 is composite.

This question belongs to: Reasoning Mental Reasoning

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