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Averages in Aptitude MCQ Quiz (Multiple Choice Questions And Answers)

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66. The average of the two-digit numbers, which remain the same when the digits interchange their positions, is:

  •  55
  • 50
  • 65
  • 60

67. The average of non-zero number and its square is 5 times the number. The number is:

  • 9
  • 18
  • 27
  • 36

68. The average of five consecutive odd numbers is 61. What is the difference between the highest and lowest numbers?

  • 8
  • 16
  • 4
  • 3

69. A family consists of grandparents, parents and three grandchildren. The average age of the grandparents is 67 years, that of the parents is 35 years and that of the grandchildren is 6 years. What is the average age of the family?

  • 40
  • 31.7142857142857
  • 31
  • 32

70. A library has an average of 510 visitors on Sunday and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is:

  • 280
  •  285
  • 290
  • 295