What is the next number in the series: 6, 11, 21, 40, 77, ? MCQ with Answer and Explanation

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What is the next number in the series: 6, 11, 21, 40, 77, ?

A. 152

B. 149

C. 150

D. 151

Answer: Option B

Solution (By JKSSB Mock Tests)

Pattern: ×2 −1, ×2 −1, ×2 −2, ×2 −3, ×2 −5? 6×2−1=11, 11×2−1=21, 21×2−2=40, 40×2−3=77, 77×2−5=149 (subtracted numbers 1,1,2,3,5 Fibonacci).

This question belongs to: Reasoning Mental Reasoning

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Question #1

A is taller than B. C is taller than A. D is taller than E but shorter than B. Who is the tallest?

A. C

B. A

C. D

D. B

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Correct Answer: Option A

Explanation:
C > A > B > D > E. C is tallest.

This question belongs to: Reasoning Mental Reasoning

Question #2

A is taller than B but shorter than C. D is taller than A but shorter than C. E is taller than C. Who is the tallest?

A. A

B. D

C. C

D. E

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Correct Answer: Option D

Explanation:
E > C > D > A > B or E > C > A, D between A and C. In both cases E is tallest.

This question belongs to: Reasoning Mental Reasoning

Question #3

In a row, Anil is 7th from left and 12th from right. How many people are in the row?

A. 17

B. 18

C. 20

D. 19

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Correct Answer: Option B

Explanation:
Total = left position + right position - 1 = 7+12-1=18.

This question belongs to: Reasoning Mental Reasoning

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