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

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

A. 15

B. 10

C. 55

D. 11

Answer: Option D

Solution (By JKSSB Mock Tests)

Squares: 1,4,9,16,25. Sum=55. Average=55/5=11.

This question belongs to: Maths Average

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Question #1

Average of 40,60,80,100 is

A. 65

B. 75

C. 70

D. 72

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Correct Answer: Option C

Explanation:
280/4=70.

This question belongs to: Maths Average

Question #2

Average of 12 numbers 1670. If average of 8 is 1665, average of remaining 4?

A. 1680

B. 1675

C. 1682

D. 1678

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Correct Answer: Option A

Explanation:
Sum12=20040. Sum8=13320. Remaining=6720. Average=1680.

This question belongs to: Maths Average

Question #3

Average of 10 numbers 2580. If average of 6 is 2575, average of remaining 4?

A. 2590

B. 2585

C. 2586

D. 2587.5

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Correct Answer: Option D

Explanation:
Sum10=25800. Sum6=15450. Remaining=10350. Average=2587.5.

This question belongs to: Maths Average

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