logo

CuriousTab

CuriousTab

Discussion


Home Aptitude Average See What Others Are Saying!
  • Question
  • 3 yr ago, the average age of a family of 5 members was 17 yr. Even after the birth of a child, the aveage is same today. Find out the age of child.


  • Options
  • A. 1 yr
  • B. 3 yr
  • C. 21/2
  • D. 2 yr

  • Correct Answer
  • 2 yr 

    Explanation

    3 yr ago, total age of 5 members of the family = 17 x 5 = 85 yr
    Present age of all the members of the family = 85 + 3 x 5 = 100 yr
    Let the age of the child = N yr
    Present avrage age of family = (100 + N) / 6
    [At present total number of members = 5 + 1 = 6]
    17 = 100N / 6
    ? 102 = 100 + N
    ? N = 2 yr


  • More questions

    • 1. 
      log √8 is equal to:
      log 8

    • Options
    • A.
      1
      √8
    • B.
      1
      4
    • C.
      1
      2
    • D.
      1
      8
    • Discuss
    • 2. 
      The value of 1 + 1 + 1 is:
      log3 60 log4 60 log5 60

    • Options
    • A. 0
    • B. 1
    • C. 5
    • D. 60
    • Discuss
    • 3. 
      .009 = .01
      ?

    • Options
    • A. .0009
    • B. .09
    • C. .9
    • D. 9
    • Discuss
    • 4. 
      Evaluate : (2.39)2 - (1.61)2
      2.39 - 1.61

    • Options
    • A. 2
    • B. 4
    • C. 6
    • D. 8
    • Discuss
    • 5. If 3√5 + √125 = 17.88, then what will be the value of √80 + 6√5?


    • Options
    • A. 13.41
    • B. 20.46
    • C. 21.66
    • D. 22.35
    • Discuss
    • 6. 
      The value of 0.1 x 0.1 x 0.1 + 0.02 x 0.02 x 0.02 is:
      0.2 x 0.2 x 0.2 + 0.04 x 0.04 x 0.04

    • Options
    • A. 0.0125
    • B. 0.125
    • C. 0.25
    • D. 0.5
    • Discuss
    • 7. 
      √3 - 1 2 simplifies to:
      √3

    • Options
    • A.
      3
      4
    • B.
      4
      √3
    • C.
      4
      3
    • D. None of these
    • Discuss
    • 8. 
      Which of the following fractions is greater than 3 and less than 5 ?
      4 6

    • Options
    • A.
      1
      2
    • B.
      2
      3
    • C.
      4
      5
    • D.
      9
      10
    • Discuss
    • 9. 
      What should come in place of both x in the equation x = √162 .
      √128 x

    • Options
    • A. 12
    • B. 14
    • C. 144
    • D. 196
    • Discuss
    • 10. 
      If (x/4) + (y/3) = 10/24 and (x/2) + y = 1, then the value of x + y is

    • Options
    • A. 1
    • B. 3/2
    • C. 2
    • D. 4
    • Discuss


    Comments

    There are no comments.

Enter a new Comment