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CA Foundation Sequence and Series — practice questions — page 3

Explore 68 free Sequence and Series questions in CA Foundation Quantitative Aptitude. Open each question or exercise to read its content, reference answers and available explanation.

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Sequence and Series questions and exercises with answers

Showing questions 61–68 of 68.

Which economist built on the contrast of geometric and arithmetic growth in his population essay?Read the answer and worked solution →Which mathematician is said to have summed 1 to 100 by pairing ends at school?Read the answer and worked solution →In an AP, any middle term of three consecutive terms equals the ... of the other two.Read the answer and worked solution →In a harmonic progression, each term is the ... of its neighbours.Read the answer and worked solution →In a positive GP, the square of any term equalsRead the answer and worked solution →An AP has 3rd term 10 and 8th term 25. The sum of its first 10 terms isRead the answer and worked solution →An AP with common difference 0 isRead the answer and worked solution →If the ratio of a GP has absolute value above 1, its termsRead the answer and worked solution →

Worked practice questions

Which economist built on the contrast of geometric and arithmetic growth in his population essay?

  1. T.R. Malthus
  2. J.M. Keynes
  3. David Ricardo
  4. Adam Smith
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Correct answer: A. T.R. Malthus

Malthus used geometric versus arithmetic growth as the basis of his Essay on the Principle of Population.

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Which mathematician is said to have summed 1 to 100 by pairing ends at school?

  1. Gauss
  2. Fermat
  3. Newton
  4. Euler
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Correct answer: A. Gauss

The anecdote credits Carl Friedrich Gauss with finding the pairing method as a schoolboy.

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In an AP, any middle term of three consecutive terms equals the ... of the other two.

  1. geometric mean
  2. their total
  3. arithmetic mean
  4. harmonic mean
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Correct answer: C. arithmetic mean

Equal differences mean the middle term sits halfway between its neighbours, which is their arithmetic mean.

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More Quantitative Aptitude topics

Time Value of MoneyProbabilityPermutations and CombinationsCorrelation and RegressionRatio and Proportion, Indices and LogarithmsSets, Relations and FunctionsMeasures of Central Tendency and DispersionStatistical Representation of Data and Sampling