Average of 21 consecutive numbers is 50. Smallest number? MCQ with Answer and Explanation

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Average of 21 consecutive numbers is 50. Smallest number?

A. 41

B. 42

C. 40

D. 39

Answer: Option C

Solution (By JKSSB Mock Tests)

Middle 11th=50. Smallest=50-10=40.

This question belongs to: Maths Average

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Question #1

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Average of 9 numbers 45. If average of first 5 is 42, average of last 5 is 48, 5th number?

A. 46

B. 48

C. 45

D. 42

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Correct Answer: Option C

Explanation:
Sum9=405. Sum1-5=210. Sum5-9=240. 5th=210+240-405=45.

This question belongs to: Maths Average

Question #2

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Average of 12 numbers 1970. If average of 8 is 1965, average of remaining 4?

A. 1975

B. 1982

C. 1980

D. 1978

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Correct Answer: Option C

Explanation:
Sum12=23640. Sum8=15720. Remaining=7920. Average=1980.

This question belongs to: Maths Average

Question #3

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Average of 10 numbers 1030. If average of 6 is 1025, average of remaining 4?

A. 1037.5

B. 1036

C. 1040

D. 1035

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Correct Answer: Option A

Explanation:
Sum10=10300. Sum6=6150. Remaining=4150. Average=1037.5.

This question belongs to: Maths Average

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