What is the average of the cubes of first 3 natural numbers? MCQ with Answer and Explanation

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What is the average of the cubes of first 3 natural numbers?

A. 12

B. 14

C. 10

D. 18

Answer: Option A

Solution (By JKSSB Mock Tests)

Cubes:1,8,27 sum=36, avg=36/3=12.

This question belongs to: Maths Average

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Practice More Average Questions

Question #1

What is average of all multiples of 7 from 7 to 70?

A. 38

B. 39

C. 35

D. 38.5

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Correct Answer: Option D

Explanation:
Multiples: 7,14,...,70 (10 numbers). Average=(7+70)/2=38.5.

This question belongs to: Maths Average

Question #2

Average of 9 numbers 1390. If average of 6 is 1385, average of remaining 3?

A. 1405

B. 1400

C. 1395

D. 1398

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Correct Answer: Option B

Explanation:
Sum9=12510. Sum6=8310. Remaining=4200. Average=1400.

This question belongs to: Maths Average

Question #3

The average of 6 numbers is 28. If two numbers are 22 and 30, find the average of the remaining four.

A. 29

B. 29.5

C. 28.5

D. 28

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Correct Answer: Option A

Explanation:
Sum=6×28=168. Sum of two=22+30=52. Sum of four=116. Avg=116/4=29.

This question belongs to: Maths Average

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