Quantitative Aptitude Practice Question and Answer

Q: Rajan's present age is three times his daughter's and nine-thirteenth of his mother's present age. The sum of the present ages of all three of them is 125 years. What is the difference between the present ages of Rajan's daughter and Rajan's mather ? 2292 0

  • 1
    32 years
    Correct
    Wrong
  • 2
    48 years
    Correct
    Wrong
  • 3
    62 years
    Correct
    Wrong
  • 4
    50 years
    Correct
    Wrong
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Answer : 4. "50 years"
Explanation :

Answer: D) 50 years Explanation: Let Rajan's present age be 'x' years.=> Then his daughter's present age is = x/3 years.His mother's present age = 13x/9 yearsNow, according to the question,x + x/3 + 13x/9 = 125=> x = 125x9/25 = 45Therefore, required difference = 13x/9 - x/3 = 13x - 3x/9 = 10x/9=> 10 x 45/9 = 50 years.

Q: A,B and C enter into a partnership in the ratio  72:43:65. After 4 months, A increases his share by 50%. If the total profit at the end of one year be Rs. 21600, then B's share in the profit is : 2283 0

  • 1
    Rs. 4000
    Correct
    Wrong
  • 2
    Rs. 6000
    Correct
    Wrong
  • 3
    Rs. 9000
    Correct
    Wrong
  • 4
    Rs. 3000
    Correct
    Wrong
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Answer : 1. "Rs. 4000"
Explanation :

Answer: A) Rs. 4000 Explanation: Given ratio of initial investments = 72:43:65 = 105 : 40 : 36.  Let the initial investments be 105x, 40x and 36x.   ∴A:B:C = 105x×4 + 150100×105x×8 : 40x×12 : 36x×12                  = 1680x : 480x : 432x = 35 : 10 : 9.   Hence, B's share = 21600×1054 = Rs. 4000.

Q: 7, 11, 19, 35, ? Find the next number in the given number series? 2280 0

  • 1
    131
    Correct
    Wrong
  • 2
    94
    Correct
    Wrong
  • 3
    83
    Correct
    Wrong
  • 4
    67
    Correct
    Wrong
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Answer : 4. "67"
Explanation :

Answer: D) 67 Explanation: Here the given series 7, 11, 19, 35, ? follows a pattern that (x 2 - 3) i.e, 7 7 x 2 - 3 = 11 11 x 2 - 3 = 19 19 x 2 - 3 = 35 35 x 2 - 3 = 67 67 x 2 - 3 = 131   Hence the next number in the given number series is 67.

Q: The ratio between boys and girl’s in a school is 4:6 respectively. If the number of boys is increased by 200 the ratio becomes 5:6 respectively. How many girls are there in the school? 2278 0

  • 1
    1200
    Correct
    Wrong
  • 2
    800
    Correct
    Wrong
  • 3
    1000
    Correct
    Wrong
  • 4
    500
    Correct
    Wrong
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Answer : 1. "1200"

Q: A certain sum of money is invested for one year at a certain rate of simple interest. If the rate of interest is 3% higher, then the invest earned will be 25% more than the interest earned earlier. What is the earlier rate of interest ? 2272 0

  • 1
    4% p.a.
    Correct
    Wrong
  • 2
    6% p.a.
    Correct
    Wrong
  • 3
    8% p.a.
    Correct
    Wrong
  • 4
    12% p.a.
    Correct
    Wrong
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Answer : 4. "12% p.a."
Explanation :

Answer: D) 12% p.a. Explanation: If the interest earned is 25% more than the earlier interest then the rate of interest also should be 25% higher than the earlier rate. Let the earlier rate of interest be x%. Now it will be (x + 3)% % increase = (x + 3) - x/x * 100 = 25=> x = 12%

Q: Find the odd man out from the given alternatives ? 2271 0

  • 1
    97
    Correct
    Wrong
  • 2
    233
    Correct
    Wrong
  • 3
    437
    Correct
    Wrong
  • 4
    599
    Correct
    Wrong
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Answer : 3. "437"
Explanation :

Answer: C) 437 Explanation: Except 437 all others are prime numbers.

Q: On selling 36 oranges one incurs a loss equal to selling Price of 4 oranges. What will be the loss%? 2264 0

  • 1
    10%
    Correct
    Wrong
  • 2
    34%
    Correct
    Wrong
  • 3
    13%
    Correct
    Wrong
  • 4
    14%
    Correct
    Wrong
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Answer : 1. "10%"

Q: Total number of students in 3 classes of a school is 333 . The number of students in class 1 and 2 are in 3:5 ratio and 2 and 3 class are 7:11 ratio . What is the strength of class that has highest number of students ? 2261 0

  • 1
    125
    Correct
    Wrong
  • 2
    155
    Correct
    Wrong
  • 3
    135
    Correct
    Wrong
  • 4
    165
    Correct
    Wrong
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Answer : 4. "165"
Explanation :

Answer: D) 165 Explanation: Ratio C1:C2 = 3:5 and C2:C3 = 7:11So C1:C2:C3 = 21 : 35 : 55Let the strength of three classes are 21x, 35x and 55x respectively, then Given that 21x + 35x + 55x = 333=> 111x = 333 or x=3So strength of the class with highest number of students =55x = 55x3 = 165.

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