Statistics
Ten quantitative aptitude questions, each marked as you answer.
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What is the range of these numbers: 11, 57, 10, 18, 23, 51, 44, 31, 51?
Answer and working
Answer A
Largest − smallest = 57 − 10 = 47.
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What is the median of these numbers: 31, 10, 54, 26, 39, 17, 41?
Answer and working
Answer A
In order: 10, 17, 26, 31, 39, 41, 54. The middle value is 31.
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What is the median of these numbers: 15, 49, 58, 35, 48, 43, 30, 34, 24?
Answer and working
Answer B
In order: 15, 24, 30, 34, 35, 43, 48, 49, 58. The middle value is 35.
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What is the median of these numbers: 55, 17, 43, 14, 25, 39, 33, 59, 29?
Answer and working
Answer D
In order: 14, 17, 25, 29, 33, 39, 43, 55, 59. The middle value is 33.
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What is the mode of these numbers: 31, 47, 30, 27, 47, 36, 47?
Answer and working
Answer C
47 occurs most often (3 times): 47.
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What is the range of these numbers: 43, 22, 59, 60, 28, 10, 26, 39, 22?
Answer and working
Answer D
Largest − smallest = 60 − 10 = 50.
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What is the mode of these numbers: 55, 47, 37, 53, 47, 31, 47?
Answer and working
Answer C
47 occurs most often (3 times): 47.
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What is the mean of these numbers: 31, 24, 54, 37, 14, 40, 16, 44, 46?
Answer and working
Answer B
Sum 306 ÷ 9 = 34.
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What is the mean of these numbers: 47, 23, 23, 42, 27, 22, 54?
Answer and working
Answer B
Sum 238 ÷ 7 = 34.
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What is the range of these numbers: 57, 14, 60, 42, 19, 27, 13?
Answer and working
Answer A
Largest − smallest = 60 − 13 = 47.
More quantitative aptitude: Percentages, Profit, loss and discount, Simple interest, Compound interest, Ratio and proportion, Averages.