Find the average of the squares of first 4 natural numbers. MCQ with Answer and Explanation

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Find the average of the squares of first 4 natural numbers.

A. 6.5

B. 7

C. 8

D. 7.5

Answer: Option D

Solution (By JKSSB Mock Tests)

Squares:1,4,9,16 sum=30, avg=30/4=7.5.

This question belongs to: Maths Average

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Question #1

Average of a,b,c,d is 25. If a=20, b=30, c=25, d=?

A. 30

B. 22

C. 25

D. 20

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Correct Answer: Option C

Explanation:
d=100-75=25.

This question belongs to: Maths Average

Question #2

What is the average of all numbers from 1 to 50 that are divisible by 7?

A. 28

B. 28.5

C. 27.5

D. 29

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Correct Answer: Option A

Explanation:
Numbers: 7,14,21,28,35,42,49. Sum=196, count=7, avg=28.

This question belongs to: Maths Average

Question #3

The average of 4 numbers is 14. If each number is divided by 2, what is the new average?

A. 6

B. 7

C. 8

D. 9

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Correct Answer: Option B

Explanation:
New average =14/2=7.

This question belongs to: Maths Average

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