The average of 9,18,27,36 is MCQ with Answer and Explanation

The average of 9,18,27,36 is

A. 25

B. 24

C. 20

D. 22.5

Answer: Option D

90/4=22.5.

This question belongs to: Maths Average

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Question #1 Report Error

The average of first 9 natural numbers is:

A. 4.5

B. 5.5

C. 5

D. 4

Correct Answer: Option C

Explanation:
Average of first n natural numbers = (n+1)/2. For n=9, average = 5.

This question belongs to: Maths Average

Question #2 Report Error

The average age of father and son is 30. If father is 45, son's age?

A. 15

B. 10

C. 20

D. 25

Correct Answer: Option A

Explanation:
Sum =60. Son=60-45=15.

This question belongs to: Maths Average

Question #3 Report Error

Average of 9 numbers 40. If average of 6 is 38, average of remaining 3?

A. 46

B. 44

C. 45

D. 42

Correct Answer: Option B

Explanation:
Sum9=360. Sum6=228. Remaining=132. Average=44.

This question belongs to: Maths Average