Quantitative Aptitude Practice Question and Answer

Q:A man went downstream for 28 km in a motor boat and immediately returned. It took the man twice as long to make the return trip. If the speed of the river flow were twice as high, the trip downstream and back would take 672 minutes. Find the speed of the boat in still water and the speed of the river flow. 46329 0

  • 1
    12 km/hr, 3 km/hr
    Correct
    Wrong
  • 2
    9 km/hr, 3 km/hr
    Correct
    Wrong
  • 3
    8 km/hr, 2 km/hr
    Correct
    Wrong
  • 4
    9 km/hr, 6 km/hr
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 2. "9 km/hr, 3 km/hr"
Explanation :

Answer: B) 9 km/hr, 3 km/hr Explanation: Let the speed of the boat = p kmph Let the speed of the river flow = q kmph From the given data, 2 x 28p + q = 28p - q   => 56p - 56q -28p - 28q = 0 => 28p = 84q => p = 3q. Now, given that if 283q + 2q + 283q - 2q = 67260=> 285q + 28q = 67260=> q = 3 kmph=> x  =3q = 9 kmph   Hence, the speed of the boat = p kmph = 9 kmph and the speed of the river flow = q kmph = 3 kmph.

  • Show AnswerHide Answer
  • Workspace

Answer : 3. "8.57 min"
Explanation :

Answer: C) 8.57 min Explanation: 1/10 + 1/15 = 1/6 x 3 = 1/2 1 - 1/2 = 1/2 1/10 + 1/15 - 1/x = 1/2 x = 8.57 min

  • Show AnswerHide Answer
  • Workspace

Answer : 3. "118.08L"
Explanation :

Answer: C) 118.08L Explanation: The amount of petrol left after 4 operations   = 200 × 1-402004   = 200 × 454   = 200 × 256625   = 81.92 litres   Hence the amount of kerosene = 200 - 81.92 = 118. 08 litres

Q:

The total number of females are what percent of the total number of males in the organization?

14608 2

  • 1
    90
    Correct
    Wrong
  • 2
    70
    Correct
    Wrong
  • 3
    80
    Correct
    Wrong
  • 4
    60
    Correct
    Wrong
  • 5
    None of these
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 3. "80"

  • Show AnswerHide Answer
  • Workspace

Answer : 3. "1400"
Explanation :

Answer: C) 1400 Explanation: Given the ratio of the circumference of front wheel  is 40 inches and back wheel is 70 inches  Distance covered = Circumference of the wheel × No. of Revolutions made by the wheel If n is the number of revolutions made by back wheel, the number of revolutions made by front wheel is n+15 Distance covered by both the wheels is the same 40*(n+3)=70n n=20                   Front wheel    :      Back Wheel  Circumference       40      :      70  Revolutions           35      :      20   Distance covered  :  40×35 = 70×20 = 1400 inches.

Q:From a container of wine, a thief has stolen 15 litres of wine and replaced it with same quantity of water. He again repeated the same process. Thus, in three attempts the ratio of wine and water became 343 : 169. The initial amount of wine in the container was: 10591 1

  • 1
    75 litres
    Correct
    Wrong
  • 2
    100 litres
    Correct
    Wrong
  • 3
    150 litres
    Correct
    Wrong
  • 4
    120 litres
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 4. "120 litres"
Explanation :

Answer: D) 120 litres Explanation: wine(left)wine(added) = 343169   It means  wine(left)wine(initial amount) = 343512    (since 343 + 169 = 512)    Thus,  343x = 512x1 - 15k3    343512 = 783 = 1 - 15k3    1-15k=78=1-18    Thus the initial amount of wine was 120 liters.

  • Show AnswerHide Answer
  • Workspace

Answer : 3. "51 min"
Explanation :

Answer: C) 51 min Explanation: The work to be done = Capacity of reservoir  = 30 litres.  1st Minute ---> inlet pipe opened ---> 5 lit filled  2nd minute ---> inlet pipe closed; outlet pipe opened ---> 4 lit emptied   In 2 minutes (5 litres - 4 litres = 1lit) is filled into the reservoir. It takes 2 minutes to fill 1lit ---> it takes 50 minutes to fill 25 litres into the reservoir.     In the 51st minute inlet pipe is opened and the reservoir is filled.

Q:Find the next number in the number series? 6, 6, 9, 18, 45, ? 7812 0

  • 1
    87
    Correct
    Wrong
  • 2
    99.75
    Correct
    Wrong
  • 3
    115.5
    Correct
    Wrong
  • 4
    135
    Correct
    Wrong
  • Show AnswerHide Answer
  • Workspace

Answer : 4. "135"
Explanation :

Answer: D) 135 Explanation: The given number series is 6, 6, 9, 18, 45, ? Here the series follows a pattern that, 6  6 x 1 = 6 6 x 1.5 = 9 9 x 2 = 18 18 x 2.5 = 45 45 x 3 = 135   Hence, the next number in the given number series is 135.

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully

      Report Error

    Please Enter Message
    Error Reported Successfully