Find the missing number in the series: 8, 24, 12, 36, 18, 54, ? MCQ with Answer and Explanation

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Find the missing number in the series: 8, 24, 12, 36, 18, 54, ?

A. 27

B. 68

C. 72

D. 108

Answer: Option A

Solution (By JKSSB Mock Tests)

Pattern: ×3, ÷2, ×3, ÷2, ×3, ÷2. 8×3=24, 24÷2=12, 12×3=36, 36÷2=18, 18×3=54, 54÷2=27.

This question belongs to: Reasoning Mental Reasoning

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Question #1

6 : 222 :: 8 : ?

A. 512

B. 510

C. 528

D. 520

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Correct Answer: Option D

Explanation:
The relation is n^3 + n. 6^3 + 6 = 216 + 6 = 222; 8^3 + 8 = 512 + 8 = 520.

This question belongs to: Reasoning Mental Reasoning

Question #2

3 : 27 :: 4 : ?

A. 48

B. 64

C. 32

D. 60

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Correct Answer: Option B

Explanation:
The relation is n^3. 3^3 = 27; therefore 4^3 = 64.

This question belongs to: Reasoning Mental Reasoning

Question #3

Find the missing term: 11, 17, 23, 29, ?

A. 34

B. 35

C. 33

D. 36

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Correct Answer: Option B

Explanation:
Arithmetic progression with common difference 6: 29+6=35.

This question belongs to: Reasoning Mental Reasoning

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