The average of squares of first 4 natural numbers is MCQ with Answer and Explanation

The average of squares of first 4 natural numbers is

A. 7.5

B. 8.5

C. 9

D. 6.5

Answer: Option A

(1+4+9+16)/4=30/4=7.5.

This question belongs to: Maths Average

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Question #1 Report Error

The average of 8 consecutive numbers is 25.5. Smallest number?

A. 21

B. 24

C. 22

D. 23

Correct Answer: Option C

Explanation:
Average middle 4.5 and 5.5 =25.5. Smallest =25.5 -3.5=22.

This question belongs to: Maths Average

Question #2 Report Error

The average weight of 6 persons is 65 kg. If a person weighing 80 kg joins, what is the new average?

A. 66.67 kg

B. 68 kg

C. 67.5 kg

D. 67.14 kg

Correct Answer: Option D

Explanation:
Sum=6×65=390. New sum=390+80=470. New avg=470/7=67.14.

This question belongs to: Maths Average

Question #3 Report Error

Average of 1425,1900,2375 is

A. 1910

B. 1890

C. 1895

D. 1900

Correct Answer: Option D

Explanation:
5700/3=1900.

This question belongs to: Maths Average