What is the average of the squares of first 5 natural numbers? MCQ with Answer and Explanation

What is the average of the squares of first 5 natural numbers?

A. 12

B. 9

C. 10

D. 11

Answer: Option D

Squares: 1,4,9,16,25 sum=55, average=55/5=11.

This question belongs to: Maths Average

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Question #1 Report Error

The average of 7 consecutive numbers is 33. What is the sum of the numbers?

A. 210

B. 231

C. 240

D. 220

Correct Answer: Option B

Explanation:
Sum = average × numbers = 33 × 7 = 231.

This question belongs to: Maths Average

Question #2 Report Error

The average of 810,1080,1350 is

A. 1075

B. 1070

C. 1090

D. 1080

Correct Answer: Option D

Explanation:
3240/3=1080.

This question belongs to: Maths Average

Question #3 Report Error

Average of 10 observations 25. Later one 35 replaced by 15, new average?

A. 23

B. 26

C. 24

D. 25

Correct Answer: Option C

Explanation:
Change -20, decrease 2, new 23? Wait 25-2=23.

This question belongs to: Maths Average