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  • Question
  • A series of books was published at seven years interval. When the seventh book was issued, the sum of the publication year was 13,524. When was the first book published?


  • Options
  • A. 1932
  • B. 1942
  • C. 1911
  • D. 1917

  • Correct Answer
  • 1911 

    Explanation

    Let us assume the first book published in year x.
    According to question,
    Books are published at seven years interval,
    First edition book published in year = x
    Second edition book published in year = x + 7
    Third edition book published in year = x + 14
    Four edition book published in year = x + 21
    Five edition book published in year = x + 28
    Six edition book published in year = x + 35
    Seven edition book published in year = x + 42
    When the seventh book was issued, the sum of the publication year was 13,524.
    x + x + 7 + x +14 + x +21 + x + 28 + x + 35 + x + 42 =13524
    147 + 7x = 13524
    7x = 13524 -147
    ? x = 13377/7 = 1911
    The first book published in year x = 1911


  • More questions

    • 1. 
      3739 + 164 x 27 =?

    • Options
    • A. 105400
    • B. 4000
    • C. 8200
    • D. 690
    • Discuss
    • 2. 
      A solution of sugar syrup has 15 % sugar. Another solution has 5 % sugar. How many liter of the second solution must be added to 20 liters of the first solution to make a solution of 10 % sugar?

    • Options
    • A. 10
    • B. 5
    • C. 15
    • D. 20
    • Discuss
    • 3. 
      If x = 997, y = 998, z = 999, then the value of x2 + y 2 + z 2 ? xy ? yz ? zx will be

    • Options
    • A. 3
    • B. 9
    • C. 16
    • D. 4
    • Discuss
    • 4. 190, 166, 145, 128, 112, 100, 91

    • Options
    • A. 100
    • B. 166
    • C. 145
    • D. 128
    • E. 112
    • Discuss
    • 5. 
      In how many ways can the letter of the word ' civilization' be arranged?

    • Options
    • A. 12! / 4!
    • B. 12! / 4! -1
    • C. 13! / 5! - 1
    • D. None of these
    • Discuss
    • 6. 
      From 4 officers and 8 Jawans in how many ways can 6 be chosen to include at least one officer?

    • Options
    • A. 896
    • B. 986
    • C. 886
    • D. 996
    • Discuss
    • 7. 
      The average age of a man and his son is 27 yr. The ratio of their ages is 8 : 1, respectively. What will be the son's age after 6 yr?

    • Options
    • A. 6 yr
    • B. 14 yr
    • C. 12 yr
    • D. 8 yr
    • Discuss
    • 8. 
      If nP r= 720 nC r than the value r is?

    • Options
    • A. 6
    • B. 5
    • C. 4
    • D. 7
    • Discuss
    • 9. 
      The average daily wages of staff, consisting of supervisors and labourers, of a company is Rs. 50. The average wages of supervisors is Rs. 150 while that of labourers is Rs. 40 per day. If the number of supervisors is 15, find the number of labourers in the company.

    • Options
    • A. 150
    • B. 175
    • C. 180
    • D. 200
    • Discuss
    • 10. 
      If a fraction is multiplied by itself and then divided by the reciprocal of the same fraction, the result is 18 26/ 27. find the fraction?

    • Options
    • A. 8/27
    • B. 11/3
    • C. 22/3
    • D. 32/3
    • Discuss


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