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

Find the missing number in the series: 8, 24, 12, 36, 18, 54, ?
A. 108
B. 72
C. 27
D. 68
Answer: Option C
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.

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Practice More Mental Reasoning Questions

Question #1
In a certain code language, 'pit na sa' means 'you are welcome', 'na ho pa la' means 'they are very good' and 'ka da la' means 'who is good'. Which of the following means 'very' in that code language?
A. ho
B. na
C. Cannot be determined
D. pa

Correct Answer: Option C


Explanation:
From second and third, 'la' = good. From first and second, 'na' = are. Remaining in second 'ho pa' = they very. Cannot determine which is very.

This question belongs to: Reasoning Mental Reasoning
Question #2
What is the angle between the hands of a clock at 3:15?
A.
B. 15°
C.
D. 7.5°

Correct Answer: Option D


Explanation:
Hour hand moves 0.5° per minute: at 3:15 it is at 97.5°. Minute hand is at 90°. Difference = 7.5°.

This question belongs to: Reasoning Mental Reasoning
Question #3
Find the odd one out: 11, 22, 33, 44, 45
A. 44
B. 33
C. 11
D. 45

Correct Answer: Option D


Explanation:
11, 22, 33 and 44 are multiples of 11, but 45 is not.

This question belongs to: Reasoning Mental Reasoning